10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

––––––––––––––––––––––––––––––––––––––––––––––––––––

xQUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2017

OR

oTRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from __________ to __________

Commission File Number: 000-51402

––––––––––––––––––––––––––––––––––––––––––––––––––––––––––

FEDERAL HOME LOAN BANK OF BOSTON

(Exact name of registrant as specified in its charter) 

Federally chartered corporation (State or other jurisdiction of incorporation or organization)	04-6002575 (I.R.S. employer identification number)
800 Boylston Street Boston, MA (Address of principal executive offices)	02199 (Zip code)

(617) 292-9600

(Registrant's telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. x Yes  o No

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). x Yes  o No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer," "accelerated filer,” "smaller reporting company," and emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer o	Accelerated filer o
Non-accelerated filer x (Do not check if a smaller reporting company)	Smaller reporting company o Emerging growth company o

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  o Yes  x No 

Indicate the number of shares outstanding of each of the issuer's classes of common stock, as of the latest practicable date.

	Shares outstanding as of April 30, 2017
Class A Stock, par value $100	zero
Class B Stock, par value $100	25,379,782

Federal Home Loan Bank of Boston

Form 10-Q

Table of Contents

PART I.	FINANCIAL INFORMATION	3
Item 1.	Financial Statements (unaudited)	3
	Statements of Condition	3
	Statements of Operations	4
	Statements of Comprehensive Income	5
	Statements of Capital	6
	Statements of Cash Flows	7
	Notes to Financial Statements	9
	Note 1 — Basis of Presentation	9
	Note 2 — Summary of Significant Accounting Policies	9
	Note 3 — Recently Issued and Adopted Accounting Guidance	9
	Note 4 — Trading Securities	10
	Note 5 — Available-for-Sale Securities	10
	Note 6 — Held-to-Maturity Securities	12
	Note 7 — Other-Than-Temporary Impairment	15
	Note 8 — Advances	16
	Note 9 — Mortgage Loans Held for Portfolio	18
	Note 10 — Allowance for Credit Losses	18
	Note 11 — Derivatives and Hedging Activities	21
	Note 12 — Deposits	26
	Note 13 — Consolidated Obligations	27
	Note 14 — Affordable Housing Program	28
	Note 15 — Capital	28
	Note 16 — Accumulated Other Comprehensive Loss	29
	Note 17 — Fair Value	30
	Note 18 — Commitments and Contingencies	35
	Note 19 — Transactions with Shareholders	36
	Note 20 — Subsequent Events	37
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	38
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	66
Item 4.	Controls and Procedures	71
PART II.	OTHER INFORMATION	71
Item 1.	Legal Proceedings	71
Item 1A.	Risk Factors	71
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	71
Item 3.	Defaults Upon Senior Securities	71
Item 4.	Mine Safety Disclosures	71
Item 5.	Other Information	71
Item 6.	Exhibits	72

2

PART I. FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

FEDERAL HOME LOAN BANK OF BOSTON STATEMENTS OF CONDITION (dollars and shares in thousands, except par value) (unaudited)
	March 31, 2017			December 31, 2016
ASSETS
Cash and due from banks	$	12,817		$	520,031
Interest-bearing deposits	246,317			278
Securities purchased under agreements to resell	2,999,000			5,999,000
Federal funds sold	5,150,000			2,700,000
Investment securities:
Trading securities	516,150			612,622
Available-for-sale securities - includes $4,657 and $7,968 pledged as collateral at March 31, 2017, and December 31, 2016, respectively that may be repledged	6,299,801			6,588,664
Held-to-maturity securities - includes $17,127 and $23,618 pledged as collateral at March 31, 2017, and December 31, 2016, respectively that may be repledged (a)	2,004,511			2,130,767
Total investment securities	8,820,462			9,332,053
Advances	35,479,424			39,099,339
Mortgage loans held for portfolio, net of allowance for credit losses of $625 and $650 at March 31, 2017, and December 31, 2016, respectively	3,675,598			3,693,894
Accrued interest receivable	78,816			84,653
Premises, software, and equipment, net	5,500			5,211
Derivative assets, net	52,693			61,598
Other assets	48,175			49,529
Total Assets	$	56,568,802		$	61,545,586
LIABILITIES
Deposits
Interest-bearing	$	468,755		$	444,897
Non-interest-bearing	21,513			37,266
Total deposits	490,268			482,163
Consolidated obligations (COs):
Bonds	27,978,423			27,171,434
Discount notes	24,179,050			30,053,964
Total consolidated obligations	52,157,473			57,225,398
Mandatorily redeemable capital stock	32,677			32,687
Accrued interest payable	100,964			80,822
Affordable Housing Program (AHP) payable	80,170			81,627
Derivative liabilities, net	325,083			357,876
Other liabilities	36,306			40,235
Total liabilities	53,222,941			58,300,808
Commitments and contingencies (Note 18)
CAPITAL
Capital stock – Class B – putable ($100 par value), 24,587 shares and 24,113 shares issued and outstanding at March 31, 2017, and December 31, 2016, respectively	2,458,667			2,411,306
Retained earnings:
Unrestricted	994,011			987,711
Restricted	236,755			229,275
Total retained earnings	1,230,766			1,216,986
Accumulated other comprehensive loss	(343,572		)	(383,514		)
Total capital	3,345,861			3,244,778
Total Liabilities and Capital	$	56,568,802		$	61,545,586

_______________________________________

(a)   Fair values of held-to-maturity securities were $2,249,437 and $2,372,290 at March 31, 2017, and December 31, 2016, respectively.

The accompanying notes are an integral part of these financial statements.

3

FEDERAL HOME LOAN BANK OF BOSTON STATEMENTS OF OPERATIONS (dollars in thousands) (unaudited)
	For the Three Months Ended March 31,
	2017			2016
INTEREST INCOME
Advances	$	106,583		$	78,219
Prepayment fees on advances, net	164			2,069
Securities purchased under agreements to resell	4,418			3,193
Federal funds sold	10,284			5,616
Investment securities:
Trading securities	2,553			2,236
Available-for-sale securities	24,664			25,145
Held-to-maturity securities	20,354			22,170
Prepayment fees on investments	65			325
Total investment securities	47,636			49,876
Mortgage loans held for portfolio	29,947			31,076
Other	59			107
Total interest income	199,091			170,156
INTEREST EXPENSE
Consolidated obligations:
Bonds	98,175			90,860
Discount notes	37,579			22,697
Total consolidated obligations	135,754			113,557
Deposits	502			115
Mandatorily redeemable capital stock	329			379
Other borrowings	2			1
Total interest expense	136,587			114,052
NET INTEREST INCOME	62,504			56,104
(Reduction of) provision for credit losses	(51		)	11
NET INTEREST INCOME AFTER (REDUCTION OF) PROVISION FOR CREDIT LOSSES	62,555			56,093
OTHER INCOME (LOSS)
Total other-than-temporary impairment losses on investment securities	(53		)	(442		)
Net amount of impairment losses reclassified from accumulated other comprehensive loss	(365		)	(905		)
Net other-than-temporary impairment losses on investment securities, credit portion	(418		)	(1,347		)
Loss on early extinguishment of debt	—			(558		)
Service fees	2,012			1,968
Net unrealized (losses) gains on trading securities	(1,414		)	1,873
Net gains (losses) on derivatives and hedging activities	36			(6,235		)
Other	(207		)	(38		)
Total other income	9			(4,337		)
OTHER EXPENSE
Compensation and benefits	10,838			10,327
Other operating expenses	5,884			5,252
Federal Housing Finance Agency (the FHFA)	1,002			1,003
Office of Finance	842			816
Other	2,408			1,536
Total other expense	20,974			18,934
INCOME BEFORE ASSESSMENTS	41,590			32,822
AHP	4,192			3,320
NET INCOME	$	37,398		$	29,502

The accompanying notes are an integral part of these financial statements.

4

FEDERAL HOME LOAN BANK OF BOSTON STATEMENTS OF COMPREHENSIVE INCOME (dollars in thousands) (unaudited)
	For the Three Months Ended March 31,
	2017			2016
Net income	$	37,398		$	29,502
Other comprehensive income:
Net unrealized gains on available-for-sale securities	26,906			51,830
Net noncredit portion of other-than-temporary impairment losses on held-to-maturity securities
Net amount of impairment losses reclassified to non-interest income	365			905
Accretion of noncredit portion	8,296			9,141
Total net noncredit portion of other-than-temporary impairment losses on held-to-maturity securities	8,661			10,046
Net unrealized gains (losses) relating to hedging activities
Unrealized losses	(138		)	(17,039		)
Reclassification adjustment for previously deferred hedging gains and losses included in net income	4,319			7,211
Total net unrealized gains (losses) relating to hedging activities	4,181			(9,828		)
Pension and postretirement benefits	194			119
Total other comprehensive income	39,942			52,167
Comprehensive income	$	77,340		$	81,669

The accompanying notes are an integral part of these financial statements.

5

FEDERAL HOME LOAN BANK OF BOSTON STATEMENTS OF CAPITAL THREE MONTHS ENDED MARCH 31, 2017 AND 2016 (dollars and shares in thousands) (unaudited)
	Capital Stock Class B – Putable					Retained Earnings								Accumulated Other Comprehensive Loss
	Shares		Par Value			Unrestricted			Restricted		Total						Total Capital
BALANCE, DECEMBER 31, 2015	23,367		$	2,336,662		$	934,214		$	194,634	$	1,128,848		$	(442,597	)	$	3,022,913
Comprehensive income						23,602			5,900		29,502			52,167			81,669
Proceeds from sale of capital stock	697		69,730														69,730
Repurchase of capital stock	(1,053	)	(105,313		)												(105,313		)
Shares reclassified to mandatorily redeemable capital stock	(1	)	(40		)												(40		)
Cash dividends on capital stock						(19,529		)			(19,529		)				(19,529		)
BALANCE, MARCH 31, 2016	23,010		$	2,301,039		$	938,287		$	200,534	$	1,138,821		$	(390,430	)	$	3,049,430
BALANCE, DECEMBER 31, 2016	24,113		$	2,411,306		$	987,711		$	229,275	$	1,216,986		$	(383,514	)	$	3,244,778
Comprehensive income						29,918			7,480		37,398			39,942			77,340
Proceeds from sale of capital stock	1,820		181,947														181,947
Repurchase of capital stock	(1,346	)	(134,586		)												(134,586		)
Cash dividends on capital stock						(23,618		)			(23,618		)				(23,618		)
BALANCE, MARCH 31, 2017	24,587		$	2,458,667		$	994,011		$	236,755	$	1,230,766		$	(343,572	)	$	3,345,861

The accompanying notes are an integral part of these financial statements.

6

FEDERAL HOME LOAN BANK OF BOSTON STATEMENTS OF CASH FLOWS (dollars in thousands) (unaudited)
	For the Three Months Ended March 31,
	2017			2016
OPERATING ACTIVITIES
Net income	$	37,398		$	29,502
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	(4,855		)	(8,153		)
(Reduction of) provision for credit losses	(51		)	11
Change in net fair-value adjustments on derivatives and hedging activities	(3,811		)	6,317
Net other-than-temporary impairment losses on investment securities, credit portion	418			1,347
Loss on early extinguishment of debt	—			558
Other adjustments	1,597			656
Net change in:
Market value of trading securities	1,414			(1,873		)
Accrued interest receivable	5,837			4,798
Other assets	(2,404		)	(1,190		)
Accrued interest payable	20,142			11,890
Other liabilities	(5,724		)	(3,217		)
Total adjustments	12,563			11,144
Net cash provided by operating activities	49,961			40,646
INVESTING ACTIVITIES
Net change in:
Interest-bearing deposits	(225,734		)	(87,084		)
Securities purchased under agreements to resell	3,000,000			(324,000		)
Federal funds sold	(2,450,000		)	(1,370,000		)
Premises, software, and equipment	(786		)	(385		)
Trading securities:
Proceeds from long-term	403,333			4,231
Purchases of long-term	(308,671		)	—
Available-for-sale securities:
Proceeds from long-term	298,387			216,181
Purchases of long-term	—			(850,766		)
Held-to-maturity securities:
Proceeds from long-term	146,485			134,411
Advances to members:
Proceeds	124,105,993			88,178,413
Disbursements	(120,511,148		)	(86,556,909		)
Mortgage loans held for portfolio:
Proceeds	122,979			106,852
Purchases	(108,181		)	(102,896		)
Proceeds from sale of foreclosed assets	1,384			1,595
Net cash provided by (used in) investing activities	4,474,041			(650,357		)
FINANCING ACTIVITIES
Net change in deposits	8,105			79,270
Net payments on derivatives with a financing element	(2,353		)	(3,386		)
Net proceeds from issuance of consolidated obligations:

7

Discount notes	38,926,960			36,534,002
Bonds	2,094,792			5,722,758
Payments for maturing and retiring consolidated obligations:
Discount notes	(44,804,024		)	(38,657,232		)
Bonds	(1,278,430		)	(3,191,164		)
Proceeds from issuance of capital stock	181,947			69,730
Payments for redemption of mandatorily redeemable capital stock	(10		)	(6,785		)
Payments for repurchase of capital stock	(134,586		)	(105,313		)
Cash dividends paid	(23,617		)	(19,529		)
Net cash (used in) provided by financing activities	(5,031,216		)	422,351
Net decrease in cash and due from banks	(507,214		)	(187,360		)
Cash and due from banks at beginning of the period	520,031			254,218
Cash and due from banks at end of the period	$	12,817		$	66,858
Supplemental disclosures:
Interest paid	$	128,146		$	112,927
AHP payments	$	5,385		$	1,990
Noncash transfers of mortgage loans held for portfolio to other assets	$	940		$	721

The accompanying notes are an integral part of these financial statements. 

8

Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

Note 1 — Basis of Presentation

The accompanying unaudited financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) for interim financial information. Accordingly, they do not include all of the information and footnotes required by GAAP for complete annual financial statements. In the opinion of management, all adjustments considered necessary have been included. All such adjustments consist of normal recurring accruals. The presentation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. The results of operations for interim periods are not necessarily indicative of the results to be expected for the year ending December 31, 2017. The unaudited financial statements should be read in conjunction with the Federal Home Loan Bank of Boston's audited financial statements and related notes in our Annual Report on Form 10-K for the year ended December 31, 2016, filed with the Securities and Exchange Commission (the SEC) on March 24, 2017 (the 2016 Annual Report). Unless otherwise indicated or the context requires otherwise, all references in this discussion to “the Bank,” "we," "us," "our," or similar references mean the Federal Home Loan Bank of Boston.

Note 2 — Summary of Significant Accounting Policies

As of March 31, 2017, we have not made any significant changes to the significant accounting policies described in Item 8 — Financial Statements and Supplementary Data — Note 18 — Fair Values in the 2016 Annual Report other than described below.

We utilize two derivatives clearing organizations (DCOs), for all cleared derivative transactions, LCH.Clearnet LLC and CME Clearing. Effective January 3, 2017, CME Clearing made certain amendments to its rulebook changing the legal characterization of variation margin payments to be daily settlement payments, rather than collateral transfers. We continue to characterize our variation margin related at LCH.Clearnet LLC contracts as cash collateral. At both DCOs, initial margin is considered cash collateral.

Note 3 — Recently Issued and Adopted Accounting Guidance

Premium Amortization on Purchased Callable Debt Securities.On March 30, 2017, the Financial Accounting Standards Board (FASB) issued amended guidance to shorten the amortization period for certain purchased callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. This guidance affects all entities that hold investments in callable debt securities that have an amortized cost basis in excess of the amount that is repayable by the issuer at the earliest call date (that is, at a premium). This guidance is effective for us for interim and annual periods beginning on January 1, 2019, and early adoption is permitted. This guidance should be applied using a modified retrospective method through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. We are in the process of evaluating this guidance and its effect on our financial condition, results of operations, and cash flows.

Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. On March 10, 2017, the FASB issued amended guidance to improve the presentation of net periodic pension cost and net periodic postretirement benefit cost. The amendments require that employers disaggregate the service cost component from the other components of net benefit cost. The amendments also provide explicit guidance on how to present the service cost component and the other components of net benefit cost in the income statement and allow only the service cost component of net benefit cost to be eligible for capitalization. This guidance is effective for us for interim and annual periods beginning on January 1, 2018, and early adoption is permitted. This guidance should be applied retrospectively for the presentation of the service cost component and the other components of net periodic pension cost and net periodic postretirement benefit cost in the income statement and prospectively, on and after the effective date, for the capitalization of the service cost component of net periodic pension cost and net periodic postretirement benefit in assets. We are in the process of evaluating this guidance and its effect on our financial condition, results of operations, and cash flows.

Contingent Put and Call Options in Debt Instruments. On March 14, 2016, the FASB issued amendments to clarify the requirements for assessing whether contingent call (put) options that can accelerate the payment of principal on debt instruments are clearly and closely related to their debt hosts. Specifically, the updated guidance clarifies what steps are required when assessing whether the economic characteristics and risks of call (put) options are clearly and closely related to

9

Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

the economic characteristics and risks of their debt hosts, which is one of the criteria for bifurcating an embedded derivative. Consequently, when a call (put) option is contingently exercisable, an entity does not have to assess whether the event that triggers the ability to exercise a call (put) option is related to interest rates or credit risks. We adopted this guidance on January 1, 2017. The adoption of this guidance did not have any effect on our financial condition, results of operations, and cash flows.

Note 4 — Trading Securities

Major Security Types. Our trading securities as of March 31, 2017, and December 31, 2016, were (dollars in thousands):

	March 31, 2017		December 31, 2016
U.S. Treasury obligations	$	308,698	$	399,521
Mortgage backed securities (MBS)
U.S. government-guaranteed – single-family	8,050		8,494
GSEs – single-family	644		768
GSEs – multifamily	198,758		203,839
	207,452		213,101
Total	$	516,150	$	612,622

Net unrealized losses or gains on trading securities for the three months ended March 31, 2017, and 2016, amounted to net losses of $1.4 million and net gains of $1.9 million for securities held on March 31, 2017, and 2016, respectively.

We do not participate in speculative trading practices and typically hold these investments over a longer time horizon.

Note 5 — Available-for-Sale Securities

Major Security Types. Our available-for-sale securities as of March 31, 2017, were (dollars in thousands):

			Amounts Recorded in Accumulated Other Comprehensive Loss
	Amortized Cost (1)		Unrealized Gains		Unrealized Losses			Fair  Value
State or local housing-finance-agency obligations (HFA securities)	$	9,350	$	—	$	(1,166	)	$	8,184
Supranational institutions	447,485		—		(25,146		)	422,339
U.S. government-owned corporations	313,779		—		(37,163		)	276,616
GSEs	129,336		—		(10,992		)	118,344
	899,950		—		(74,467		)	825,483
MBS
U.S. government guaranteed – single-family	119,919		62		(2,303		)	117,678
U.S. government guaranteed – multifamily	512,927		—		(2,795		)	510,132
GSEs – single-family	4,208,100		3,950		(36,542		)	4,175,508
GSEs – multifamily	668,808		2,192		—			671,000
	5,509,754		6,204		(41,640		)	5,474,318
Total	$	6,409,704	$	6,204	$	(116,107	)	$	6,299,801

_______________________

(1) Amortized cost of available-for-sale securities includes adjustments made to the cost basis of an investment for accretion, amortization, collection of cash, and fair-value hedge accounting adjustments.

Our available-for-sale securities as of December 31, 2016, were (dollars in thousands):

10

Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

			Amounts Recorded in Accumulated Other Comprehensive Loss
	Amortized Cost (1)		Unrealized Gains		Unrealized Losses			Fair  Value
HFA securities	$	9,350	$	—	$	(1,204	)	$	8,146
Supranational institutions	452,021		—		(29,401		)	422,620
U.S. government-owned corporations	317,588		—		(45,631		)	271,957
GSEs	130,798		—		(13,330		)	117,468
	909,757		—		(89,566		)	820,191
MBS
U.S. government guaranteed – single-family	127,032		16		(2,321		)	124,727
U.S. government guaranteed – multifamily	565,593		45		(2,277		)	563,361
GSEs – single-family	4,447,803		1,765		(45,713		)	4,403,855
GSEs – multifamily	675,288		1,242		—			676,530
	5,815,716		3,068		(50,311		)	5,768,473
Total	$	6,725,473	$	3,068	$	(139,877	)	$	6,588,664

_______________________

(1) Amortized cost of available-for-sale securities includes adjustments made to the cost basis of an investment for accretion, amortization, collection of cash, and fair-value hedge accounting adjustments.

The following table summarizes our available-for-sale securities with unrealized losses as of March 31, 2017, which are aggregated by major security type and length of time that individual securities have been in a continuous unrealized loss position (dollars in thousands):

	Less than 12 Months					12 Months or More					Total
	Fair  Value		Unrealized  Losses			Fair  Value		Unrealized  Losses			Fair  Value		Unrealized  Losses
HFA securities	$	8,184	$	(1,166	)	$	—	$	—		$	8,184	$	(1,166	)
Supranational institutions	—		—			422,339		(25,146		)	422,339		(25,146		)
U.S. government-owned corporations	—		—			276,616		(37,163		)	276,616		(37,163		)
GSEs	—		—			118,344		(10,992		)	118,344		(10,992		)
	8,184		(1,166		)	817,299		(73,301		)	825,483		(74,467		)
MBS
U.S. government guaranteed – single-family	—		—			86,435		(2,303		)	86,435		(2,303		)
U.S. government guaranteed – multifamily	364,121		(1,760		)	146,011		(1,035		)	510,132		(2,795		)
GSEs – single-family	3,017,265		(30,967		)	327,482		(5,575		)	3,344,747		(36,542		)
	3,381,386		(32,727		)	559,928		(8,913		)	3,941,314		(41,640		)
Total temporarily impaired	$	3,389,570	$	(33,893	)	$	1,377,227	$	(82,214	)	$	4,766,797	$	(116,107	)

The following table summarizes our available-for-sale securities with unrealized losses as of December 31, 2016, which are aggregated by major security type and length of time that individual securities have been in a continuous unrealized loss position (dollars in thousands):

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Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

	Less than 12 Months					12 Months or More					Total
	Fair  Value		Unrealized  Losses			Fair  Value		Unrealized  Losses			Fair  Value		Unrealized  Losses
HFA securities	$	8,146	$	(1,204	)	$	—	$	—		$	8,146	$	(1,204	)
Supranational institutions	—		—			422,620		(29,401		)	422,620		(29,401		)
U.S. government-owned corporations	—		—			271,957		(45,631		)	271,957		(45,631		)
GSEs	—		—			117,468		(13,330		)	117,468		(13,330		)
	8,146		(1,204		)	812,045		(88,362		)	820,191		(89,566		)
MBS
U.S. government guaranteed – single-family	31,606		(4		)	90,854		(2,317		)	122,460		(2,321		)
U.S. government guaranteed – multifamily	326,126		(1,261		)	165,246		(1,016		)	491,372		(2,277		)
GSEs – single-family	3,517,094		(39,181		)	351,331		(6,532		)	3,868,425		(45,713		)
	3,874,826		(40,446		)	607,431		(9,865		)	4,482,257		(50,311		)
Total temporarily impaired	$	3,882,972	$	(41,650	)	$	1,419,476	$	(98,227	)	$	5,302,448	$	(139,877	)

Redemption Terms. The amortized cost and fair value of our available-for-sale securities by contractual maturity at March 31, 2017, and December 31, 2016, were (dollars in thousands):

	March 31, 2017				December 31, 2016
Year of Maturity	Amortized Cost		Fair  Value		Amortized Cost		Fair  Value
Due in one year or less	$	—	$	—	$	—	$	—
Due after one year through five years	9,350		8,184		9,350		8,146
Due after five years through 10 years	169,829		160,476		171,589		161,746
Due after 10 years	720,771		656,823		728,818		650,299
	899,950		825,483		909,757		820,191
MBS (1)	5,509,754		5,474,318		5,815,716		5,768,473
Total	$	6,409,704	$	6,299,801	$	6,725,473	$	6,588,664

_______________________

(1) MBS are not presented by contractual maturity because their expected maturities will likely differ from contractual maturities because borrowers of the underlying loans may have the right to call or prepay obligations with or without call or prepayment fees.

Note 6 — Held-to-Maturity Securities

Major Security Types. Our held-to-maturity securities as of March 31, 2017, were (dollars in thousands):

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Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

	Amortized Cost		Other-Than-Temporary Impairment Recognized in Accumulated Other Comprehensive Loss			Carrying Value		Gross Unrecognized Holding Gains		Gross Unrecognized Holding Losses			Fair Value
U.S. agency obligations	$	1,922	$	—		$	1,922	$	41	$	—		$	1,963
HFA securities	161,289		—			161,289		11		(17,212		)	144,088
	163,211		—			163,211		52		(17,212		)	146,051
MBS
U.S. government guaranteed – single-family	12,073		—			12,073		243		—			12,316
U.S. government guaranteed – multifamily	1,489		—			1,489		—		(3		)	1,486
GSEs – single-family	744,548		—			744,548		15,430		(455		)	759,523
GSEs – multifamily	296,207		—			296,207		10,735		—			306,942
Private-label – residential	957,620		(183,165		)	774,455		243,699		(7,609		)	1,010,545
Asset-backed securities (ABS) backed by home equity loans	13,080		(552		)	12,528		554		(508		)	12,574
	2,025,017		(183,717		)	1,841,300		270,661		(8,575		)	2,103,386
Total	$	2,188,228	$	(183,717	)	$	2,004,511	$	270,713	$	(25,787	)	$	2,249,437

Our held-to-maturity securities as of December 31, 2016, were (dollars in thousands):

	Amortized Cost		Other-Than-Temporary Impairment Recognized in Accumulated Other Comprehensive Loss			Carrying Value		Gross Unrecognized Holding Gains		Gross Unrecognized Holding Losses			Fair Value
U.S. agency obligations	$	2,159	$	—		$	2,159	$	56	$	—		$	2,215
HFA securities	162,568		—			162,568		11		(19,291		)	143,288
	164,727		—			164,727		67		(19,291		)	145,503
MBS
U.S. government guaranteed – single-family	12,719		—			12,719		246		—			12,965
U.S. government guaranteed – multifamily	1,532		—			1,532		—		—			1,532
GSEs – single-family	812,836		—			812,836		16,881		(519		)	829,198
GSEs – multifamily	318,667		—			318,667		11,692		—			330,359
Private-label – residential	999,149		(191,804		)	807,345		240,818		(8,373		)	1,039,790
ABS backed by home equity loans	13,515		(574		)	12,941		602		(600		)	12,943
	2,158,418		(192,378		)	1,966,040		270,239		(9,492		)	2,226,787
Total	$	2,323,145	$	(192,378	)	$	2,130,767	$	270,306	$	(28,783	)	$	2,372,290

The following table summarizes our held-to-maturity securities with unrealized losses as of March 31, 2017, which are aggregated by major security type and length of time that individual securities have been in a continuous unrealized loss position (dollars in thousands).

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Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

	Less than 12 Months					12 Months or More					Total
	Fair Value		Unrealized Losses			Fair  Value		Unrealized Losses			Fair Value		Unrealized Losses
HFA securities	$	—	$	—		$	141,759	$	(17,212	)	$	141,759	$	(17,212	)
MBS
U.S. government guaranteed - multifamily	1,486		(3		)	—		—			1,486		(3		)
GSEs – single-family	21,376		(331		)	23,144		(124		)	44,520		(455		)
Private-label – residential	14,825		(115		)	326,790		(23,148		)	341,615		(23,263		)
ABS backed by home equity loans	—		—			11,584		(656		)	11,584		(656		)
	37,687		(449		)	361,518		(23,928		)	399,205		(24,377		)
Total	$	37,687	$	(449	)	$	503,277	$	(41,140	)	$	540,964	$	(41,589	)

The following table summarizes our held-to-maturity securities with unrealized losses as of December 31, 2016, which are aggregated by major security type and length of time that individual securities have been in a continuous unrealized loss position (dollars in thousands).

	Less than 12 Months					12 Months or More					Total
	Fair Value		Unrealized Losses			Fair  Value		Unrealized Losses			Fair Value		Unrealized Losses
HFA securities	$	—	$	—		$	140,959	$	(19,291	)	$	140,959	$	(19,291	)
MBS
GSEs – single-family	83,291		(393		)	13,405		(126		)	96,696		(519		)
Private-label – residential	16,915		(128		)	397,407		(28,781		)	414,322		(28,909		)
ABS backed by home equity loans	—		—			11,898		(720		)	11,898		(720		)
	100,206		(521		)	422,710		(29,627		)	522,916		(30,148		)
Total	$	100,206	$	(521	)	$	563,669	$	(48,918	)	$	663,875	$	(49,439	)

Redemption Terms. The amortized cost, carrying value, and fair value of our held-to-maturity securities by contractual maturity at March 31, 2017, and December 31, 2016, are shown below (dollars in thousands). Expected maturities of some securities and MBS may differ from contractual maturities because borrowers of the underlying loans may have the right to call or prepay their obligations with or without call or prepayment fees.

	March 31, 2017						December 31, 2016
Year of Maturity	Amortized Cost		Carrying Value (1)		Fair Value		Amortized Cost		Carrying Value (1)		Fair Value
Due in one year or less	$	—	$	—	$	—	$	—	$	—	$	—
Due after one year through five years	16,401		16,401		16,446		16,637		16,637		16,663
Due after five years through 10 years	—		—		—		—		—		—
Due after 10 years	146,810		146,810		129,605		148,090		148,090		128,840
	163,211		163,211		146,051		164,727		164,727		145,503
MBS (2)	2,025,017		1,841,300		2,103,386		2,158,418		1,966,040		2,226,787
Total	$	2,188,228	$	2,004,511	$	2,249,437	$	2,323,145	$	2,130,767	$	2,372,290

_______________________

(1) Carrying value of held-to-maturity securities represents the sum of amortized cost and the amount of noncredit-related other-than-temporary impairment recognized in accumulated other comprehensive loss.

14

Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

(2) MBS are not presented by contractual maturity because their expected maturities will likely differ from contractual maturities because borrowers of the underlying loans may have the right to call or prepay their obligations with or without call or prepayment fees.

Note 7 — Other-Than-Temporary Impairment

We evaluate our individual available-for-sale and held-to-maturity securities for other-than-temporary impairment each quarter.

Available-for-Sale Securities

We determined that none of our available-for-sale securities were other-than-temporarily impaired at March 31, 2017. At March 31, 2017, we held certain available-for-sale securities in an unrealized loss position. These unrealized losses reflect the impact of normal yield and spread fluctuations attendant with security markets. We consider these unrealized losses temporary because we expect to recover the entire amortized cost basis on these available-for-sale securities in an unrealized loss position and neither intend to sell these securities nor is it more likely than not that we will be required to sell these securities before the anticipated recovery of each security's remaining amortized cost basis. Additionally, there have been no shortfalls of principal or interest on any available-for-sale security.

Held-to-Maturity Securities

HFA Securities and Agency MBS. We have reviewed our investments in HFA securities and agency MBS and have determined that all unrealized losses are temporary. We do not intend to sell the investments nor is it more likely than not that we will be required to sell the investments before recovery of the amortized cost basis. We do not consider these investments to be other-than-temporarily impaired at March 31, 2017.

Private-Label Residential MBS and ABS Backed by Home Equity Loans. For those securities for which a credit loss was recognized during the three months endedMarch 31, 2017, the following table presents a summary of the average projected values over the remaining lives of the securities for the significant inputs used to measure the amount of the credit loss recognized in earnings, as well as related current credit enhancement. Credit enhancement is defined as the percentage of subordinated tranches, over-collateralization, and other credit enhancement, if any, in a security structure that will generally absorb losses before we will experience a credit loss on the security. The calculated averages represent the dollar-weighted average of Alt-A other-than-temporarily impaired private-label residential MBS (dollars in thousands).

			Weighted Average of Significant Inputs						Weighted Average Current Credit Enhancement
Private-label MBS by Classification	Par Value		Projected Prepayment Rates		Projected Default Rates		Projected Loss Severities
Alt-A - Private-label residential MBS (1)	$	46,262	7.7	%	31.7	%	37.6	%	4.4	%

_______________________

(1) Securities are classified based upon the current performance characteristics of the underlying loan pool and therefore the manner in which the loan pool backing the security has been modeled (as prime, Alt-A, or subprime), rather than their classification of the security at the time of issuance.

The following table sets forth our securities for which other-than-temporary impairment credit losses were recognized during the life of the security through March 31, 2017 (dollars in thousands). Securities are classified in the table below based on their classifications at the time of issuance.

	March 31, 2017
Other-Than-Temporarily Impaired Investment (1)	Par Value		Amortized Cost		Carrying Value		Fair Value
Private-label residential MBS – Prime	$	37,589	$	32,394	$	25,666	$	33,369
Private-label residential MBS – Alt-A	1,062,245		786,567		610,130		846,087
ABS backed by home equity loans – Subprime	3,670		3,359		2,808		3,362
Total other-than-temporarily impaired securities	$	1,103,504	$	822,320	$	638,604	$	882,818

_______________________

15

Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

(1) We have instituted litigation related to certain of the private-label MBS in which we invested. Our complaint asserts, among others, claims for untrue or misleading statements in the sale of securities. It is possible that classifications of private-label MBS as provided herein when based on classification at the time of issuance as disclosed by those securities' issuance documents, as well as other statements about the securities, are inaccurate.

The following table presents a roll-forward of the amounts related to credit losses recognized in earnings. The roll-forward is the amount of credit losses on investment securities for which we recognized a portion of other-than-temporary impairment charges into accumulated other comprehensive loss (dollars in thousands).

	For the Three Months Ended March 31,
	2017			2016
Balance at beginning of period	$	490,404		$	533,888
Additions:
Additional credit losses for which an other-than-temporary impairment charge was previously recognized(1)	418			1,347
Reductions:
Increase in cash flows expected to be collected which are recognized over the remaining life of the security(2)	(8,601		)	(9,426		)
Balance at end of period	$	482,221		$	525,809

_______________________

(1) For the three monthsMarch 31, 2017 and 2016, additional credit losses for which an other-than-temporary impairment charge was previously recognized relate to securities that were also previously impaired prior to January 1, 2017 and 2016, respectively.

(2) Represents amounts accreted as interest income during the current period.

Note 8 — Advances

General Terms. At both March 31, 2017, and December 31, 2016, we had advances outstanding with interest rates ranging from zero percent to 7.72 percent as summarized below (dollars in thousands).

	March 31, 2017					December 31, 2016
Year of Contractual Maturity	Amount			Weighted Average Rate		Amount			Weighted Average Rate
Overdrawn demand-deposit accounts	$	7,935		1.21	%	$	3,780		0.92	%
Due in one year or less	17,444,622			1.22		18,783,802			1.05
Due after one year through two years	8,673,994			1.31		10,966,780			1.15
Due after two years through three years	2,821,139			1.72		2,508,459			1.67
Due after three years through four years	2,011,518			1.74		2,177,432			1.64
Due after four years through five years	1,889,679			1.86		2,041,269			1.80
Thereafter	2,671,123			1.63		2,633,333			1.70
Total par value	35,520,010			1.38	%	39,114,855			1.23	%
Premiums	21,143					22,633
Discounts	(28,551		)			(25,847		)
Fair value of bifurcated derivatives (1)	(576		)			(153		)
Hedging adjustments	(32,602		)			(12,149		)
Total	$	35,479,424				$	39,099,339

_________________________

(1) At March 31, 2017, and December 31, 2016, we had certain advances with embedded features that met the requirements to be separated from the host contract and designated as stand-alone derivatives.

16

Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

At March 31, 2017, and December 31, 2016, we had callable advances and floating-rate advances that may be prepaid on a floating-rate reset date without prepayment or termination fees outstanding totaling $5.9 billion and $7.9 billion, respectively.

The following table sets forth our advances outstanding by the year of contractual maturity or next call date for callable advances (dollars in thousands):

Year of Contractual Maturity or Next Call Date (1), Par Value	March 31, 2017		December 31, 2016
Overdrawn demand-deposit accounts	$	7,935	$	3,780
Due in one year or less	23,108,797		26,447,977
Due after one year through two years	3,410,994		3,693,780
Due after two years through three years	2,821,139		2,508,459
Due after three years through four years	1,826,318		2,002,232
Due after four years through five years	1,739,679		1,891,269
Thereafter	2,605,148		2,567,358
Total par value	$	35,520,010	$	39,114,855

_______________________

(1) Also includes certain floating-rate advances that may be contractually prepaid by the borrower on a floating-rate reset date without incurring prepayment or termination fees.

At March 31, 2017, and December 31, 2016, we had putable advances outstanding totaling $3.3 billion and $3.4 billion, respectively.

The following table sets forth our advances outstanding by the year of contractual maturity or next put date for putable advances (dollars in thousands):

Year of Contractual Maturity or Next Put Date, Par Value	March 31, 2017		December 31, 2016
Overdrawn demand-deposit accounts	$	7,935	$	3,780
Due in one year or less	19,278,622		20,788,552
Due after one year through two years	8,991,244		10,946,530
Due after two years through three years	2,723,139		2,455,709
Due after three years through four years	1,842,518		1,974,932
Due after four years through five years	1,594,179		1,736,769
Thereafter	1,082,373		1,208,583
Total par value	$	35,520,010	$	39,114,855

Interest-Rate-Payment Terms. The following table details interest-rate-payment types for our outstanding advances (dollars in thousands):

Par value of advances	March 31, 2017		December 31, 2016
Fixed-rate	$	28,953,692	$	30,526,192
Variable-rate	6,566,318		8,588,663
Total par value	$	35,520,010	$	39,114,855

Credit-Risk Exposure and Security Terms. At March 31, 2017, and December 31, 2016, we had $12.4 billion and $16.2 billion, respectively, of advances issued to members with at least $1.0 billion of advances outstanding. These advances were made to six borrowers at both March 31, 2017, and December 31, 2016, representing 35.0 percent and 41.5 percent, respectively, of total par value of outstanding advances. For information related to our credit risk on advances and allowance for credit losses, see Note 10 — Allowance for Credit Losses.

17

Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

Note 9 — Mortgage Loans Held for Portfolio

We invest in mortgage loans through the Mortgage Partnership Finance^® (MPF^® program). These mortgage loans are either guaranteed or insured by federal agencies, as is the case with government mortgage loans, or are credit-enhanced by the related entity that sold the loan (a participating financial institution), as is the case with conventional mortgage loans. All such investments are held for portfolio.

The following table presents certain characteristics of these investments (dollars in thousands):

	March 31, 2017			December 31, 2016
Real estate
Fixed-rate 15-year single-family mortgages	$	509,001		$	528,486
Fixed-rate 20- and 30-year single-family mortgages	3,100,731			3,098,476
Premiums	66,437			67,523
Discounts	(1,681		)	(1,696		)
Deferred derivative gains, net	1,735			1,755
Total mortgage loans held for portfolio	3,676,223			3,694,544
Less: allowance for credit losses	(625		)	(650		)
Total mortgage loans, net of allowance for credit losses	$	3,675,598		$	3,693,894

The following table details the par value of mortgage loans held for portfolio (dollars in thousands):

	March 31, 2017		December 31, 2016
Conventional mortgage loans	$	3,228,586	$	3,235,835
Government mortgage loans	381,146		391,127
Total par value	$	3,609,732	$	3,626,962

See Note 10 — Allowance for Credit Losses for information related to our credit risk from our investments in mortgage loans and allowance for credit losses based on these investments.

"Mortgage Partnership Finance," and "MPF" are registered trademarks of the Federal Home Loan Bank of Chicago.

Note 10 — Allowance for Credit Losses

An allowance for credit losses is a valuation allowance separately established for each identified portfolio segment, if necessary, to provide for probable losses inherent in our portfolio as of the statement of condition date. To the extent necessary, an allowance for credit losses for off-balance-sheet credit exposure is recorded as a liability.

For additional information see Item 8 — Financial Statements and Supplementary Data — Note 10 — Allowance for Credit Losses in the 2016 Annual Report.

Secured Member Credit Products

We manage our credit exposure to secured member credit products through an integrated approach that generally includes establishing a credit limit for each borrower, an ongoing review of each borrower's financial condition, and collateral and lending policies that are intended to limit risk of loss while balancing borrowers' needs for a reliable source of funding.

At March 31, 2017, and December 31, 2016, none of our secured member credit products outstanding were past due, on nonaccrual status, or considered impaired. In addition, there were no troubled debt restructurings related to credit products during the three months ended March 31, 2017 and 2016.

18

Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

Based upon the collateral held as security, our credit extension and collateral policies, management's credit analysis, and the repayment history on secured member credit products, we have not recorded any allowance for credit losses on our secured member credit products at March 31, 2017, and December 31, 2016. At March 31, 2017, and December 31, 2016, no liability to reflect an allowance for credit losses for off-balance-sheet credit exposures was recorded. See Note 18 — Commitments and Contingencies for additional information on our off-balance-sheet credit exposure.

For additional information see Item 8 — Financial Statements and Supplementary Data — Note 10 — Allowance for Credit Losses in the 2016 Annual Report.

Government MortgageLoans Held for Portfolio

Based on our assessment of our servicers for our government loans, there is no allowance for credit losses for the government mortgage loan portfolio as of March 31, 2017, and December 31, 2016. In addition, these mortgage loans are not placed on nonaccrual status due to the government guarantee or insurance on these loans and the contractual obligation of the loan servicers to repurchase their related loans when certain criteria are met.

For additional information see Item 8 — Financial Statements and Supplementary Data — Note 10 — Allowance for Credit Losses in the 2016 Annual Report.

Conventional Mortgage Loans Held for Portfolio

For information on our conventional mortgage loans held for portfolio see Item 8 — Financial Statements and Supplementary Data — Note 10 — Allowance for Credit Losses in the 2016 Annual Report.

Credit Quality Indicators. Key credit quality indicators for mortgage loans include the migration of past due loans, nonaccrual loans, loans in process of foreclosure, and impaired loans. The tables below set forth certain key credit quality indicators for our investments in mortgage loans at March 31, 2017, and December 31, 2016 (dollars in thousands):

	March 31, 2017
	Recorded Investment in Conventional Mortgage Loans			Recorded Investment in Government Mortgage Loans			Total
Past due 30-59 days delinquent	$	27,972		$	14,051		$	42,023
Past due 60-89 days delinquent	7,066			3,647			10,713
Past due 90 days or more delinquent	14,464			5,093			19,557
Total past due	49,502			22,791			72,293
Total current loans	3,253,714			368,795			3,622,509
Total mortgage loans	$	3,303,216		$	391,586		$	3,694,802
Other delinquency statistics
In process of foreclosure, included above (1)	$	7,193		$	1,003		$	8,196
Serious delinquency rate (2)	0.46		%	1.30		%	0.55		%
Past due 90 days or more still accruing interest	$	—		$	5,093		$	5,093
Loans on nonaccrual status (3)	$	14,753		$	—		$	14,753

_______________________

(1) Includes loans where the decision of foreclosure or similar alternative such as pursuit of deed-in-lieu of foreclosure has been reported.

(2) Loans that are 90 days or more past due or in the process of foreclosure expressed as a percentage of the recorded investment in the total loan portfolio class.

(3) Includes conventional mortgage loans with contractual principal or interest payments 90 days or more past due and not accruing interest as well as loans modified within the previous six months under our temporary loan modification plan.

19

Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

	December 31, 2016
	Recorded Investment in Conventional Mortgage Loans			Recorded Investment in Government Mortgage Loans			Total
Past due 30-59 days delinquent	$	26,757		$	14,878		$	41,635
Past due 60-89 days delinquent	5,508			3,846			9,354
Past due 90 days or more delinquent	16,379			5,807			22,186
Total past due	48,644			24,531			73,175
Total current loans	3,262,671			377,438			3,640,109
Total mortgage loans	$	3,311,315		$	401,969		$	3,713,284
Other delinquency statistics
In process of foreclosure, included above (1)	$	7,495		$	1,502		$	8,997
Serious delinquency rate (2)	0.53		%	1.44		%	0.63		%
Past due 90 days or more still accruing interest	$	—		$	5,807		$	5,807
Loans on nonaccrual status (3)	$	16,940		$	—		$	16,940

_______________________

(1) Includes loans where the decision of foreclosure or similar alternative such as pursuit of deed-in-lieu of foreclosure has been reported.

(2) Loans that are 90 days or more past due or in the process of foreclosure expressed as a percentage of the recorded investment in the total loan portfolio class.

(3) Includes conventional mortgage loans with contractual principal or interest payments 90 days or more past due and not accruing interest as well as loans modified within the previous six months under our temporary loan modification plan.

For information on how we collectively and individually evaluate mortgage loans for impairment see Item 8 — Financial Statements and Supplementary Data — Note 10 — Allowance for Credit Losses in the 2016 Annual Report.

Individually Evaluated Impaired Loans. The following tables present the recorded investment, par value and any related allowance for impaired loans individually assessed for impairment at March 31, 2017, and December 31, 2016, and the average recorded investment and interest income recognized on these loans during the three months ended March 31, 2017 and 2016 (dollars in thousands).

	As of March 31, 2017				As of December 31, 2016
	Recorded Investment		Par Value		Recorded Investment		Par Value
Individually evaluated impaired mortgage loans with no related allowance	$	21,352	$	21,311	$	22,945	$	22,905

	For the Three Months Ended March 31,
	2017				2016
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
Individually evaluated impaired mortgage loans with no related allowance	$	21,699	$	116	$	25,841	$	80

Credit Enhancements. Our allowance for credit losses factors in the credit enhancements associated with conventional mortgage loans under the MPF program. These credit enhancements apply after the homeowner's equity is exhausted and can include primary and/or supplemental mortgage insurance or other kinds of credit enhancement. The credit-enhancement amounts estimated to protect us against credit losses are determined through the use of a model. Any incurred losses that would be recovered from the credit enhancements are not reserved as part of our allowance for loan losses. In such cases, a receivable is generally established to reflect the expected recovery from credit-enhancement arrangements.

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Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

Previously, conventional mortgage loans were required to be credit enhanced so that the risk of loss was limited to the losses equivalent to an investment in a double-A rated MBS at the time of purchase. The FHFA final rule on acquired member assets (AMA) went into effect on January 18, 2017, allowing each FHLBank to utilize its own model to determine the credit enhancement for AMA loan assets and pool loans in lieu of a nationally recognized statistical ratings organization (NRSRO) ratings model. Upon effectiveness of the final AMA rule, we determined that assets delivered to us must be credit enhanced at our determined “AMA investment grade” of a double-A rated MBS. In March 2017, we determined that assets delivered to us must be credit enhanced at our revised determination of “AMA investment grade” of a single-A-minus rated MBS. This revision had no impact on the March 31, 2017, allowance for credit losses. We share the risk of credit losses on our investments in mortgage loans with the related participating financial institution by structuring potential losses on these investments into layers with respect to each master commitment. We analyze the risk characteristics of our mortgage loans using a third-party model to determine the credit enhancement amount at the time of purchase. This credit-enhancement amount is broken into a first-loss account and a credit-enhancement obligation of each participating financial institution, which may be calculated based on the risk analysis to equal the difference between the amounts needed for the master commitment to have a rating equivalent to a single-A-minus rated MBS and our initial first-loss account exposure.

Roll-Forward of Allowance for Credit Losses on Mortgage Loans. The following table presents a roll-forward of the allowance for credit losses on conventional mortgage loans for the three months ended March 31, 2017 and 2016, as well as the recorded investment in mortgage loans by impairment methodology at March 31, 2017 and 2016 (dollars in thousands). The recorded investment in a loan is the par amount of the loan, adjusted for accrued interest, unamortized premiums or discounts, deferred derivative gains and losses, and direct write-downs. The recorded investment is net of any valuation allowance.

	For the Three Months Ended March 31,
	2017			2016
Allowance for credit losses
Balance, beginning of period	$	650		$	1,025
Recoveries (charge-offs)	26			(11		)
(Reduction of) provision for credit losses	(51		)	11
Balance, end of period	$	625		$	1,025
Ending balance, individually evaluated for impairment	$	—		$	—
Ending balance, collectively evaluated for impairment	$	625		$	1,025
Recorded investment, end of period (1)
Individually evaluated for impairment	$	21,352		$	25,316
Collectively evaluated for impairment	$	3,281,864		$	3,151,522

_________________________

(1) These amounts exclude government mortgage loans because we make no allowance for credit losses based on our investments in government mortgage loans, as discussed above under — Government Mortgage Loans Held for Portfolio.

Note 11 — Derivatives and Hedging Activities

The following table presents the notional amount and fair value of derivatives (excluding fair value adjustments related to variation margin for daily settled contracts) and total derivatives assets and liabilities. Total derivative asset and liabilities include the effect of netting adjustments, cash collateral, and variation margin for daily settled contracts as of March 31, 2017, and December 31, 2016 (dollars in thousands):

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Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

	March 31, 2017								December 31, 2016
	Notional Amount of Derivatives		Derivative Assets			Derivative Liabilities			Notional Amount of Derivatives		Derivative Assets		Derivative Liabilities
Derivatives designated as hedging instruments
Interest-rate swaps	$	17,424,429	$	58,357		$	(375,167	)	$	18,215,809	$	52,715	$	(413,026	)
Forward-start interest-rate swaps	527,800		—			(36,253		)	527,800		—		(36,250		)
Total derivatives designated as hedging instruments	17,952,229		58,357			(411,420		)	18,743,609		52,715		(449,276		)
Derivatives not designated as hedging instruments
Economic hedges:
Interest-rate swaps	1,099,500		1,995			(9,011		)	1,199,000		2,293		(10,840		)
Mortgage-delivery commitments (1)	37,827		202			(9		)	22,524		70		(171		)
Total derivatives not designated as hedging instruments	1,137,327		2,197			(9,020		)	1,221,524		2,363		(11,011		)
Total notional amount of derivatives	$	19,089,556							$	19,965,133
Total derivatives before netting and collateral adjustments			60,554			(420,440		)			55,078		(460,287		)
Netting adjustments, cash collateral, and variation margin for daily settled contracts including related accrued interest (2)			(7,861		)	95,357					6,520		102,411
Derivative assets and derivative liabilities			$	52,693		$	(325,083	)			$	61,598	$	(357,876	)

_______________________

(1) Mortgage-delivery commitments are classified as derivatives with changes in fair value recorded in other income.

(2) Amounts represent the effect of master-netting agreements intended to allow us to settle positive and negative positions with the same counterparty. Cash collateral and related accrued interest posted was $57.7 million and $109.8 million at March 31, 2017, and December 31, 2016, respectively. The change in cash collateral posted is included in the net change in interest-bearing deposits in the statement of cash flows. Cash collateral and related accrued interest received was $851,000 and $850,000 at March 31, 2017, and December 31, 2016, respectively. Variation margin for daily settled contracts was $30.6 million at March 31, 2017.

Net (losses) gains on derivatives and hedging activities recorded in Other Income (Loss) for the three months endedMarch 31, 2017 and 2016, were as follows (dollars in thousands):

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Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

	For the Three Months Ended March 31,
	2017			2016
Derivatives designated as hedging instruments
Interest-rate swaps	$	(659	)	$	(3,033	)
Forward-start interest-rate swaps	134			(346		)
Total net losses related to derivatives designated as hedging instruments	(525		)	(3,379		)
Derivatives not designated as hedging instruments:
Economic hedges:
Interest-rate swaps	153			(3,472		)
Mortgage-delivery commitments	357			616
Total net gains (losses) related to derivatives not designated as hedging instruments	510			(2,856		)
Other(1)	51			—
Net gains (losses) on derivatives and hedging activities	$	36		$	(6,235	)

______________

(1) Consists of price alignment amount on derivatives for which variation margin is characterized as a daily settlement amount.

The following tables present, by type of hedged item, the gains (losses) on derivatives and the related hedged items in fair-value hedge relationships and the impact of those derivatives on our net interest income for the three months endedMarch 31, 2017 and 2016 (dollars in thousands):

	For the Three Months Ended March 31, 2017
	Gain/(Loss) on Derivative		Gain/(Loss) on Hedged Item			Net Fair-Value Hedge Ineffectiveness			Effect of Derivatives on Net Interest Income (1)
Hedged Item:
Advances	$	21,095	$	(20,453	)	$	642		$	(13,405	)
Investments	10,268		(9,808		)	460			(8,341		)
COs – bonds	76		(1,837		)	(1,761		)	4,641
Total	$	31,439	$	(32,098	)	$	(659	)	$	(17,105	)

	For the Three Months Ended March 31, 2016
	Gain/(Loss) on Derivative			Gain/(Loss) on Hedged Item			Net Fair-Value Hedge Ineffectiveness			Effect of Derivatives on Net Interest Income (1)
Hedged Item:
Advances	$	(68,456	)	$	68,233		$	(223	)	$	(30,124	)
Investments	(49,455		)	49,839			384			(9,011		)
COs – bonds	10,267			(13,461		)	(3,194		)	8,072
Total	$	(107,644	)	$	104,611		$	(3,033	)	$	(31,063	)

______________

(1) The net interest on derivatives in fair-value hedge relationships is presented in the statement of operations as interest income or interest expense of the respective hedged item.

The following table presents the losses recognized in accumulated other comprehensive loss, the losses reclassified from accumulated other comprehensive loss into income, and the effect of our hedging activities on our net losses on derivatives and

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Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

hedging activities in the statement of income for our forward-start interest-rate swaps associated with hedged CO bonds in cash-flow hedge relationships (dollars in thousands).

Derivatives and Hedged Items in Cash Flow Hedging Relationships	Losses Recognized in Other Comprehensive Loss on Derivatives (Effective Portion)			Location of Losses Reclassified from Accumulated Other Comprehensive Loss into Net Income (Effective Portion)	Losses Reclassified from Accumulated Other Comprehensive Loss into Net Income (Effective Portion)			Gains (Losses) Recognized in Net Losses on Derivatives and Hedging Activities (Ineffective Portion)
Interest-rate swaps - CO bonds
For the Three Months Ended March 31, 2017	$	(138	)	Interest expense	$	(4,315	)	$	134
For the Three Months Ended March 31, 2016	(17,039		)	Interest expense	(7,208		)	(346		)

For the three months endedMarch 31, 2017 and 2016, there were no reclassifications from accumulated other comprehensive loss into earnings as a result of the discontinuance of cash-flow hedges because the original forecasted transactions were not expected to occur by the end of the originally specified time period or within a two-month period thereafter. As of March 31, 2017, the maximum length of time over which we are hedging our exposure to the variability in future cash flows for forecasted transactions is eight years.

As of March 31, 2017, the amount of deferred net losses on derivatives accumulated in other comprehensive loss related to cash flow hedges expected to be reclassified to earnings during the next 12 months is $7.2 million.

Managing Credit Risk on Derivatives. We enter into derivatives that we clear (cleared derivatives) with a DCO, our counterparty for such derivatives. We also enter into derivatives that are not cleared (uncleared derivatives) under master-netting agreements. Certain of our uncleared derivatives master-netting agreements contain provisions that require us to post additional collateral with our uncleared derivatives counterparties if our credit ratings are lowered. Under the terms that govern such agreements, if our credit rating is lowered by Moody's Investors Services (Moody's) or Standard & Poor's Rating Service (S&P) to a certain level, we are required to deliver additional collateral on uncleared derivatives in a net liability position. In the event of a split between such credit ratings, the lower rating governs. The aggregate fair value of all uncleared derivatives with these provisions that were in a net-liability position (before cash collateral and related accrued interest) at March 31, 2017, was $355.3 million for which we had delivered collateral with a post-haircut value of $324.7 million in accordance with the terms of the master-netting agreements. Securities collateral is subject to valuation haircuts in accordance with the terms of the master-netting arrangements. The following table sets forth the post-haircut value of incremental collateral that certain uncleared derivatives counterparties could have required us to deliver based on incremental credit rating downgrades at March 31, 2017.

Post Haircut Value of Incremental Collateral to be Delivered  as of March 31, 2017 (dollars in thousands)
Ratings Downgrade (1)
From	To	Incremental Collateral
AA+	AA or AA-	$	11,638
AA-	A+, A or A-	12,399
A-	below A-	16,808

_______________________

(1) Ratings are expressed in this table according to S&P's conventions but include the equivalent of such rating by Moody's. If there is a split rating, the lower rating is used.

For cleared derivatives, the DCO is our counterparty. The DCO notifies the clearing member of the required initial and variation margin and our agent (clearing member) in turn notifies us. We utilize two DCOs, for all cleared derivative transactions, LCH.Clearnet LLC and CME Clearing. Effective January 3, 2017, CME Clearing made certain amendments to its rulebook, changing the legal characterization of variation margin payments to be daily settlement payments, rather than collateral. We continue to characterize our variation margin related to LCH.Clearnet LLC contracts as cash collateral. At both DCOs, initial margin is considered cash collateral. We post initial margin and exchange variation margin through a clearing

24

Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

member who acts as our agent to the DCO and who guarantees our performance to the DCO, subject to the terms of relevant agreements. These arrangements expose us to credit risk in the event that one of our clearing members or one of the DCOs fails to meet its obligations. The use of cleared derivatives is intended to mitigate credit risk exposure because the DCO, which is fully secured at all times through margin received from its clearing members, is substituted for the credit risk exposure of individual counterparties in uncleared derivatives, and collateral is posted at least once daily for changes in the fair value of cleared derivatives through a clearing member.

We have analyzed the rights, rules, and regulations governing our cleared derivatives and determined that those rights, rules, and regulations should result in a net claim through each of our clearing members with the related DCO upon an event of default including a bankruptcy, insolvency or similar proceeding involving the DCO or one of our clearing members, or both. For this purpose, net claim generally means a single net amount reflecting the aggregation of all amounts indirectly owed by us to the relevant DCO and indirectly payable to us from the relevant DCO. Based on this analysis, we are presenting a net derivative receivable or payable for all of our transactions through a particular clearing member with a particular DCO.

For cleared derivatives, the DCO determines initial margin requirements. We clear our trades via clearing members of the DCOs. The clearing members who act as our agent to the DCOs are U.S. Commodity Futures Trading Commission (the CFTC)- registered futures commission merchants. Our clearing members may require us to post margin in excess of DCO requirements based on our credit or other considerations, including but not limited to, credit rating downgrades. We were not required to post any such excess margin by our clearing members based on credit considerations at March 31, 2017.

Offsetting of Certain Derivatives. We present derivatives, any related cash collateral, including initial and certain variation margin, received or pledged, and associated accrued interest, on a net basis by counterparty.

The following table presents separately the fair value of derivatives that are subject to netting due to a legal right of offset based on the terms of our master netting arrangements or similar agreements as of March 31, 2017, and December 31, 2016 and the fair value of derivatives that are not subject to such netting (dollars in thousands). Such netting includes any related cash collateral received from or pledged to counterparties and variation margin for daily settled contracts.

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Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

	March 31, 2017						December 31, 2016
	Derivative Assets			Derivative Liabilities			Derivative Assets			Derivative Liabilities
Derivatives meeting netting requirements
Gross recognized amount
Uncleared derivatives	$	13,350		$	(367,754	)	$	12,594		$	(405,310	)
Cleared derivatives	47,002			(52,677		)	42,414			(54,806		)
Total gross recognized amount	60,352			(420,431		)	55,008			(460,116		)
Gross amounts of netting adjustments, cash collateral, and variation margin for daily settled contracts
Uncleared derivatives	(12,518		)	42,680			(12,028		)	47,605
Cleared derivatives	4,657			52,677			18,548			54,806
Total gross amounts of netting adjustments, cash collateral, and variation margin for daily settled contracts	(7,861		)	95,357			6,520			102,411
Net amounts after netting adjustments, cash collateral, and variation margin for daily settled contracts
Uncleared derivatives	832			(325,074		)	566			(357,705		)
Cleared derivatives	51,659			—			60,962			—
Total net amounts after netting adjustments, cash collateral, and variation margin for daily settled contracts	52,491			(325,074		)	61,528			(357,705		)
Derivatives not meeting netting requirements
Mortgage delivery commitments	202			(9		)	70			(171		)
Total derivative assets and total derivative liabilities
Uncleared derivatives	832			(325,074		)	566			(357,705		)
Cleared derivatives	51,659			—			60,962			—
Mortgage delivery commitments	202			(9		)	70			(171		)
Total derivative assets and total derivative liabilities presented in the statement of condition	52,693			(325,083		)	61,598			(357,876		)
Non-cash collateral received or pledged not offset (1)
Can be sold or repledged
Uncleared derivatives	—			21,063			—			30,306
Cannot be sold or repledged
Uncleared derivatives	—			278,113			—			290,444
Total non-cash collateral received or pledged, not offset	—			299,176			—			320,750
Net amount
Uncleared derivatives	832			(25,898		)	566			(36,955		)
Cleared derivatives	51,659			—			60,962			—
Mortgage delivery commitments	202			(9		)	70			(171		)
Total net amount	$	52,693		$	(25,907	)	$	61,598		$	(37,126	)

_______________________

(1) Includes non-cash collateral at fair value. Any overcollateralization with a counterparty is not included in the determination of the net amount. At March 31, 2017, and December 31, 2016, we had additional net credit exposure of $1.1 million and $2.0 million, respectively, due to instances where our collateral pledged to a counterparty exceeded our net derivative liability position.

Note 12 — Deposits

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Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

We offer demand and overnight deposits for members and qualifying nonmembers. In addition, we offer short-term interest-bearing deposit programs to members. Members that service mortgage loans may deposit funds collected in connection with mortgage loans pending disbursement of such funds to the owners of the mortgage loans. We classify these items as "other" in the following table.

The following table details interest- and noninterest-bearing deposits (dollars in thousands):

	March 31, 2017		December 31, 2016
Interest-bearing
Demand and overnight	$	465,931	$	440,731
Other	2,824		4,166
Noninterest-bearing
Other	21,513		37,266
Total deposits	$	490,268	$	482,163

Note 13 — Consolidated Obligations

COs - Bonds. The following table sets forth the outstanding CO bonds for which we were primarily liable at March 31, 2017, and December 31, 2016, by year of contractual maturity (dollars in thousands):

	March 31, 2017					December 31, 2016
Year of Contractual Maturity	Amount			Weighted Average Rate (1)		Amount			Weighted Average Rate (1)
Due in one year or less	$	11,252,735		1.37	%	$	8,734,955		1.43	%
Due after one year through two years	6,436,440			1.31		7,752,420			1.19
Due after two years through three years	3,197,930			1.71		3,297,120			1.63
Due after three years through four years	1,361,695			1.89		1,637,335			1.87
Due after four years through five years	2,551,775			1.68		2,574,375			1.65
Thereafter	3,147,595			2.73		3,135,745			2.70
Total par value	27,948,170			1.60	%	27,131,950			1.58	%
Premiums	106,776					118,145
Discounts	(14,606		)			(14,906		)
Hedging adjustments	(61,917		)			(63,755		)
	$	27,978,423				$	27,171,434

_______________________

(1) The CO bonds' weighted-average rate excludes concession fees.

Our CO bonds outstanding at March 31, 2017, and December 31, 2016, included (dollars in thousands):

	March 31, 2017		December 31, 2016
Par value of CO bonds
Noncallable and nonputable	$	23,290,170	$	22,388,950
Callable	4,658,000		4,743,000
Total par value	$	27,948,170	$	27,131,950

The following is a summary of the CO bonds for which we were primarily liable at March 31, 2017, and December 31, 2016, by year of contractual maturity or next call date for callable CO bonds (dollars in thousands):

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Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

Year of Contractual Maturity or Next Call Date	March 31, 2017		December 31, 2016
Due in one year or less	$	15,067,735	$	12,858,955
Due after one year through two years	5,916,440		7,013,420
Due after two years through three years	2,979,930		2,904,120
Due after three years through four years	1,013,695		1,289,335
Due after four years through five years	1,284,775		1,242,375
Thereafter	1,685,595		1,823,745
Total par value	$	27,948,170	$	27,131,950

The following table sets forth the CO bonds for which we were primarily liable by interest-rate-payment type at March 31, 2017, and December 31, 2016 (dollars in thousands):

	March 31, 2017		December 31, 2016
Par value of CO bonds
Fixed-rate	$	20,386,170	$	20,289,950
Simple variable-rate	6,005,000		5,300,000
Step-up	1,557,000		1,542,000
Total par value	$	27,948,170	$	27,131,950

COs – Discount Notes. Outstanding CO discount notes for which we were primarily liable, all of which are due within one year, were as follows (dollars in thousands):

	Book Value		Par Value		Weighted Average Rate (1)
March 31, 2017	$	24,179,050	$	24,193,530	0.65	%
December 31, 2016	$	30,053,964	$	30,070,103	0.47	%

_______________________

(1) The CO discount notes' weighted-average rate represents a yield to maturity excluding concession fees.

Note 14 — Affordable Housing Program

The following table presents a roll-forward of the AHP liability for the three months endedMarch 31, 2017, and year ended December 31, 2016 (dollars in thousands):

	March 31, 2017			December 31, 2016
Balance at beginning of period	$	81,627		$	82,081
AHP expense for the period	4,192			19,397
AHP direct grant disbursements	(5,385		)	(18,575		)
AHP subsidy for AHP advance disbursements	(267		)	(1,378		)
Return of previously disbursed grants and subsidies	3			102
Balance at end of period	$	80,170		$	81,627

Note 15 — Capital

We are subject to capital requirements under our capital plan, the Federal Home Loan Bank Act of 1932, as amended (the FHLBank Act), and FHFA regulations:

1. Risk-based capital. We are required to maintain at all times permanent capital, defined as Class B stock, including Class B stock classified as mandatorily redeemable capital stock, and retained earnings, in an amount at least equal to the sum of our credit-risk capital requirement, market-risk capital requirement, and operations-risk capital requirement, calculated in

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Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

accordance with FHFA rules and regulations, referred to herein as the risk-based capital requirement. Only permanent capital satisfies the risk-based capital requirement.

2. Total regulatory capital. We are required to maintain at all times a total capital-to-assets ratio of at least four percent. Total regulatory capital is the sum of permanent capital, the amount paid-in for Class A stock, the amount of any general loss allowance if consistent with GAAP and not established for specific assets, and other amounts from sources determined by the FHFA as available to absorb losses. We have never issued Class A stock.

3. Leverage capital. We are required to maintain at all times a leverage capital-to-assets ratio of at least five percent. Leverage capital is defined as the sum of permanent capital weighted 1.5 times and all other capital without a weighting factor.

The FHFA may require us to maintain a greater amount of permanent capital than is required as defined by the risk-based capital requirements.

The following tables demonstrate our compliance with our regulatory capital requirements at March 31, 2017, and December 31, 2016 (dollars in thousands):

Risk-Based Capital Requirements	March 31, 2017		December 31, 2016
Permanent capital
Class B capital stock	$	2,458,667	$	2,411,306
Mandatorily redeemable capital stock	32,677		32,687
Retained earnings	1,230,766		1,216,986
Total permanent capital	$	3,722,110	$	3,660,979
Risk-based capital requirement
Credit-risk capital	$	352,679	$	355,182
Market-risk capital	168,602		118,765
Operations-risk capital	156,385		142,184
Total risk-based capital requirement	$	677,666	$	616,131
Permanent capital in excess of risk-based capital requirement	$	3,044,444	$	3,044,848

	March 31, 2017						December 31, 2016
	Required			Actual			Required			Actual
Capital Ratio
Risk-based capital	$	677,666		$	3,722,110		$	616,131		$	3,660,979
Total regulatory capital	$	2,262,752		$	3,722,110		$	2,461,823		$	3,660,979
Total capital-to-asset ratio	4.0		%	6.6		%	4.0		%	5.9		%
Leverage Ratio
Leverage capital	$	2,828,440		$	5,583,165		$	3,077,279		$	5,491,469
Leverage capital-to-assets ratio	5.0		%	9.9		%	5.0		%	8.9		%

Note 16 — Accumulated Other Comprehensive Loss

The following table presents a summary of changes in accumulated other comprehensive loss for the three months endedMarch 31, 2017 and 2016 (dollars in thousands):

29

Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

	Net Unrealized Loss on Available-for-sale Securities			Noncredit Portion of Other-than-temporary Impairment Losses on Held-to-maturity Securities			Net Unrealized Loss Relating to Hedging Activities			Pension and Postretirement Benefits			Total Accumulated Other Comprehensive Loss
Balance, December 31, 2015	$	(137,718	)	$	(229,785	)	$	(71,237	)	$	(3,857	)	$	(442,597	)
Other comprehensive income (loss) before reclassifications:
Net unrealized gains (losses)	51,830			—			(17,039		)	—			34,791
Noncredit other-than-temporary impairment losses	—			(8		)	—			—			(8		)
Accretion of noncredit loss	—			9,141			—			—			9,141
Net actuarial gain	—			—			—			1			1
Reclassifications from other comprehensive income to net income
Noncredit other-than-temporary impairment losses reclassified to credit loss (1)	—			913			—			—			913
Amortization - hedging activities (2)	—			—			7,211			—			7,211
Amortization - pension and postretirement benefits (3)	—			—			—			118			118
Other comprehensive income (loss)	51,830			10,046			(9,828		)	119			52,167
Balance, March 31, 2016	$	(85,888	)	$	(219,739	)	$	(81,065	)	$	(3,738	)	$	(390,430	)
Balance, December 31, 2016	$	(136,809	)	$	(192,379	)	$	(48,187	)	$	(6,139	)	$	(383,514	)
Other comprehensive income (loss) before reclassifications:
Net unrealized gains (losses)	26,906			—			(138		)	—			26,768
Accretion of noncredit loss	—			8,296			—			—			8,296
Reclassifications from other comprehensive income to net income
Noncredit other-than-temporary impairment losses reclassified to credit loss (1)	—			365			—			—			365
Amortization - hedging activities (4)	—			—			4,319			—			4,319
Amortization - pension and postretirement benefits (3)	—			—			—			194			194
Other comprehensive income	26,906			8,661			4,181			194			39,942
Balance, March 31, 2017	$	(109,903	)	$	(183,718	)	$	(44,006	)	$	(5,945	)	$	(343,572	)

_______________________

(1) Recorded in net amount of impairment losses reclassified to (from) accumulated other comprehensive loss in the statement of operations.

(2) Amortization of hedging activities includes $7.2 million recorded in CO bond interest expense and $4,000 recorded in net gains (losses) on derivatives and hedging activities in the statement of operations.

(3) Recorded in other operating expenses in the statement of operations.

(4) Amortization of hedging activities includes $4.3 million recorded in CO bond interest expense and $4,000 recorded in net gains (losses) on derivatives and hedging activities in the statement of operations.

Note 17— Fair Values

A fair-value hierarchy is used to prioritize the inputs of valuation techniques used to measure fair value. A description of the application of the fair-value hierarchy, valuation techniques, and significant inputs is disclosed in Item 8 — Financial Statements and Supplementary Data — Note 18 — Fair Values in the 2016 Annual Report. There have been no material

30

Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

changes in the fair-value hierarchy classification of financial assets and liabilities, valuation techniques, or significant inputs during the three months endedMarch 31, 2017.

The carrying values, fair values, and fair-value hierarchy of our financial instruments at March 31, 2017, and December 31, 2016, were as follows (dollars in thousands). These fair values do not represent an estimate of our overall market value as a going concern, which would take into account, among other things, our future business opportunities and the net profitability of our assets and liabilities.

	March 31, 2017
	Carrying Value			Total Fair Value			Level 1			Level 2			Level 3		Netting Adjustments and Cash Collateral
Financial instruments
Assets:
Cash and due from banks	$	12,817		$	12,817		$	12,817		$	—		$	—	$	—
Interest-bearing deposits	246,317			246,317			246,317			—			—		—
Securities purchased under agreements to resell	2,999,000			2,998,891			—			2,998,891			—		—
Federal funds sold	5,150,000			5,149,928			—			5,149,928			—		—
Trading securities(1)	516,150			516,150			—			516,150			—		—
Available-for-sale securities(1)	6,299,801			6,299,801			—			6,291,617			8,184		—
Held-to-maturity securities	2,004,511			2,249,437			—			1,082,230			1,167,207		—
Advances	35,479,424			35,643,128			—			35,643,128			—		—
Mortgage loans, net	3,675,598			3,708,652			—			3,682,550			26,102		—
Accrued interest receivable	78,816			78,816			—			78,816			—		—
Derivative assets(1)	52,693			52,693			—			60,554			—		(7,861		)
Other assets (1)	21,046			21,046			11,652			9,394			—		—
Liabilities:
Deposits	(490,268		)	(490,263		)	—			(490,263		)	—		—
COs:
Bonds	(27,978,423		)	(28,100,611		)	—			(28,100,611		)	—		—
Discount notes	(24,179,050		)	(24,177,609		)	—			(24,177,609		)	—		—
Mandatorily redeemable capital stock	(32,677		)	(32,677		)	(32,677		)	—			—		—
Accrued interest payable	(100,964		)	(100,964		)	—			(100,964		)	—		—
Derivative liabilities(1)	(325,083		)	(325,083		)	—			(420,440		)	—		95,357
Other:
Commitments to extend credit for advances	—			(4,811		)	—			(4,811		)	—		—
Standby letters of credit	(1,040		)	(1,040		)	—			(1,040		)	—		—

_______________________

(1) Carried at fair value on a recurring basis.

31

Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

	December 31, 2016
	Carrying Value			Total Fair Value			Level 1			Level 2			Level 3		Netting Adjustments and Cash Collateral
Financial instruments
Assets:
Cash and due from banks	$	520,031		$	520,031		$	520,031		$	—		$	—	$	—
Interest-bearing deposits	278			278			278			—			—		—
Securities purchased under agreements to resell	5,999,000			5,998,799			—			5,998,799			—		—
Federal funds sold	2,700,000			2,699,949			—			2,699,949			—		—
Trading securities(1)	612,622			612,622			—			612,622			—		—
Available-for-sale securities(1)	6,588,664			6,588,664			—			6,580,518			8,146		—
Held-to-maturity securities	2,130,767			2,372,290			—			1,176,269			1,196,021		—
Advances	39,099,339			39,273,044			—			39,273,044			—		—
Mortgage loans, net	3,693,894			3,736,548			—			3,708,123			28,425		—
Accrued interest receivable	84,653			84,653			—			84,653			—		—
Derivative assets(1)	61,598			61,598			—			55,078			—		6,520
Other assets(1)	17,779			17,779			8,394			9,385			—		—
Liabilities:
Deposits	(482,163		)	(482,158		)	—			(482,158		)	—		—
COs:
Bonds	(27,171,434		)	(27,298,499		)	—			(27,298,499		)	—		—
Discount notes	(30,053,964		)	(30,054,085		)	—			(30,054,085		)	—		—
Mandatorily redeemable capital stock	(32,687		)	(32,687		)	(32,687		)	—			—		—
Accrued interest payable	(80,822		)	(80,822		)	—			(80,822		)	—		—
Derivative liabilities(1)	(357,876		)	(357,876		)	—			(460,287		)	—		102,411
Other:
Commitments to extend credit for advances	—			(4,412		)	—			(4,412		)	—		—
Standby letters of credit	(1,064		)	(1,064		)	—			(1,064		)	—		—

_______________________

(1) Carried at fair value on a recurring basis.

Fair Value Measured on a Recurring Basis.

The following tables present our assets and liabilities that are measured at fair value on the statement of condition, which are recorded on a recurring basis at March 31, 2017, and December 31, 2016, by fair-value hierarchy level (dollars in thousands):

32

Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

	March 31, 2017
	Level 1		Level 2			Level 3		Netting Adjustment (1)			Total
Assets:
Trading securities:
U.S. Treasury obligations	$	—	$	308,698		$	—	$	—		$	308,698
U.S. government-guaranteed – single-family MBS	—		8,050			—		—			8,050
GSEs – single-family MBS	—		644			—		—			644
GSEs – multifamily MBS	—		198,758			—		—			198,758
Total trading securities	—		516,150			—		—			516,150
Available-for-sale securities:
State or local HFA securities	—		—			8,184		—			8,184
Supranational institutions	—		422,339			—		—			422,339
U.S. government-owned corporations	—		276,616			—		—			276,616
GSEs	—		118,344			—		—			118,344
U.S. government guaranteed – single-family MBS	—		117,678			—		—			117,678
U.S. government guaranteed – multifamily MBS	—		510,132			—		—			510,132
GSEs – single-family MBS	—		4,175,508			—		—			4,175,508
GSEs – multifamily MBS	—		671,000			—		—			671,000
Total available-for-sale securities	—		6,291,617			8,184		—			6,299,801
Derivative assets:
Interest-rate-exchange agreements	—		60,352			—		(7,861		)	52,491
Mortgage delivery commitments	—		202			—		—			202
Total derivative assets	—		60,554			—		(7,861		)	52,693
Other assets	11,652		9,394			—		—			21,046
Total assets at fair value	$	11,652	$	6,877,715		$	8,184	$	(7,861	)	$	6,889,690
Liabilities:
Derivative liabilities
Interest-rate-exchange agreements	$	—	$	(420,431	)	$	—	$	95,357		$	(325,074	)
Mortgage delivery commitments	—		(9		)	—		—			(9		)
Total liabilities at fair value	$	—	$	(420,440	)	$	—	$	95,357		$	(325,083	)

_______________________

(1) These amounts represent the application of the netting requirements which allow us to settle positive and negative positions and also cash collateral and related accrued interest held or placed with the same clearing member and/or counterparty.

33

Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

	December 31, 2016
	Level 1		Level 2			Level 3		Netting Adjustment (1)		Total
Assets:
Trading securities:
U.S. Treasury obligations	$	—	$	399,521		$	—	$	—	$	399,521
U.S. government-guaranteed – single-family MBS	—		8,494			—		—		8,494
GSEs – single-family MBS	—		768			—		—		768
GSEs – multifamily MBS	—		203,839			—		—		203,839
Total trading securities	—		612,622			—		—		612,622
Available-for-sale securities:
State or local HFA securities	—		—			8,146		—		8,146
Supranational institutions	—		422,620			—		—		422,620
U.S. government-owned corporations	—		271,957			—		—		271,957
GSEs	—		117,468			—		—		117,468
U.S. government guaranteed – single-family MBS	—		124,727			—		—		124,727
U.S. government guaranteed – multifamily MBS	—		563,361			—		—		563,361
GSEs – single-family MBS	—		4,403,855			—		—		4,403,855
GSEs – multifamily MBS	—		676,530			—		—		676,530
Total available-for-sale securities	—		6,580,518			8,146		—		6,588,664
Derivative assets:
Interest-rate-exchange agreements	—		55,008			—		6,520		61,528
Mortgage delivery commitments	—		70			—		—		70
Total derivative assets	—		55,078			—		6,520		61,598
Other assets	8,394		9,385			—		—		17,779
Total assets at fair value	$	8,394	$	7,257,603		$	8,146	$	6,520	$	7,280,663
Liabilities:
Derivative liabilities
Interest-rate-exchange agreements	$	—	$	(460,116	)	$	—	$	102,411	$	(357,705	)
Mortgage delivery commitments	—		(171		)	—		—		(171		)
Total liabilities at fair value	$	—	$	(460,287	)	$	—	$	102,411	$	(357,876	)

_______________________

(1) These amounts represent the application of the netting requirements which allow us to settle positive and negative positions and also cash collateral and related accrued interest held or placed with the same clearing member and/or counterparty.

The following table presents a reconciliation of available-for-sale securities that are measured at fair value on a recurring basis

using significant unobservable inputs (Level 3) during the three months endedMarch 31, 2017. There were no Level 3 available-for-sale securities during the three months endedMarch 31, 2016 (dollars in thousands).

	March 31, 2017
Balance at beginning of period	$	8,146
Purchases	—
Unrealized gains included in other comprehensive income	38
Balance at end of period	$	8,184

34

Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

Fair Value on a Nonrecurring Basis

We measure certain held-to-maturity investment securities, mortgage loans held for portfolio, and real-estate-owned property (REO) at fair value on a nonrecurring basis, that is, they are not measured at fair value on an ongoing basis but are subject to fair-value adjustments only in certain circumstances (for example, upon recognizing an other-than-temporary impairment on a held-to-maturity security).

The following tables present financial assets by level within the fair-value hierarchy which were recorded at fair value on a nonrecurring basis. The fair values presented are as of the date the fair value adjustment was recorded (dollars in thousands).

	March 31, 2017
	Level 1		Level 2		Level 3		Total
Held-to-maturity securities:
Private-label residential MBS	$	—	$	—	$	5,264	$	5,264
Mortgage loans held for portfolio	—		—		5,145		5,145
REO	—		—		544		544
Total assets recorded at fair value on a nonrecurring basis	$	—	$	—	$	10,953	$	10,953

	December 31, 2016
	Level 1		Level 2		Level 3		Total
Held-to-maturity securities:
Private-label residential MBS	$	—	$	—	$	8,498	$	8,498
Mortgage loans held for portfolio	—		—		5,618		5,618
REO	—		—		786		786
Total assets recorded at fair value on a nonrecurring basis	$	—	$	—	$	14,902	$	14,902

Note 18 — Commitments and Contingencies

Joint and Several Liability. COs are backed by the financial resources of the FHLBanks. The FHFA has authority to require any FHLBank to repay all or a portion of the principal and interest on COs for which another FHLBank is the primary obligor. No FHLBank has ever been asked or required to repay the principal or interest on any CO on behalf of another FHLBank. We evaluate the financial condition of the other FHLBanks primarily based on known regulatory actions, publicly available financial information, and individual long-term credit-rating action as of each period-end presented. Based on this evaluation, as of March 31, 2017, and through the filing of this report, we believe there is a remote likelihood that we will be required to repay the principal or interest on any CO on behalf of another FHLBank.

We have considered applicable FASB guidance and determined it is not necessary to recognize a liability for the fair value of our joint and several liability for all of the COs. The joint and several obligation is mandated by the FHLBank Act and FHFA regulations and is not the result of an arms-length transaction among the FHLBanks. The FHLBanks have no control over the amount of the guaranty or the determination of how each FHLBank would perform under the joint and several obligation. Because the FHLBanks are subject to the authority of the FHFA as it relates to decisions involving the allocation of the joint and several liability for the FHLBanks' COs, the FHLBanks' joint and several obligation is excluded from the initial recognition and measurement provisions. Accordingly, we have not recognized a liability for our joint and several obligation related to other FHLBanks' COs at March 31, 2017, and December 31, 2016. The par amounts of other FHLBanks' outstanding COs for which we are jointly and severally liable totaled $907.1 billion and $932.1 billion at March 31, 2017, and December 31, 2016, respectively. See Note 13 — Consolidated Obligations for additional information.

Off-Balance-Sheet Commitments

35

Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

The following table sets forth our off-balance-sheet commitments as of March 31, 2017, and December 31, 2016 (dollars in thousands):

	March 31, 2017						December 31, 2016
	Expire within one year		Expire after one year		Total		Expire within one year		Expire after one year		Total
Standby letters of credit outstanding (1)	$	4,472,318	$	174,997	$	4,647,315	$	4,050,447	$	179,632	$	4,230,079
Commitments for unused lines of credit - advances (2)	1,261,985		—		1,261,985		1,255,140		—		1,255,140
Commitments to make additional advances	33,928		73,193		107,121		44,865		65,972		110,837
Commitments to invest in mortgage loans	37,827		—		37,827		22,524		—		22,524
Unsettled CO bonds, at par	70,750		—		70,750		—		—		—

__________________________

(1) The amount of standby letters of credit outstanding excludes commitments to issue standby letters of credit that expire within one year. At March 31, 2017, and December 31, 2016, these amounts totaled $44.1 million and $2.7 million, respectively. Also excluded are commitments to issue standby letters of credit that expire after one year totaling $285,000 at December 31, 2016.

(2) Commitments for unused line-of-credit advances are generally for periods of up to 12 months. Since many of these commitments are not expected to be drawn upon, the total commitment amount does not necessarily indicate future liquidity requirements.

Standby Letters of Credit.A standby letter of credit is a financing arrangement pursuant to which we agree for a fee to fund the associated obligation to a third-party beneficiary should the primary obligor fail to fund such obligation. If we are required to make payment for a beneficiary's draw, our strategy is to take prompt action to recover the funds paid to the third-party beneficiary, including converting the payment amount into a collateralized advance to the primary obligor, withdrawing the payment amount from the primary obligor's demand deposit account with us, or selling collateral pledged by the primary obligor in a commercially reasonable manner to offset the payment amount. The original terms of these standby letters of credit have original expiration periods of up to 20 years, currently expiring no later than 2026. Our unearned fees for the value of the guarantees related to standby letters of credit are recorded in other liabilities and totaled $1.0 million and $1.1 million at March 31, 2017, and December 31, 2016, respectively.

Commitments to Invest in Mortgage Loans. Commitments to invest in mortgage loans are generally for periods not to exceed 45 business days. Such commitments are recorded as derivatives at their fair values on the statement of condition.

Pledged Collateral. We have pledged securities, as collateral, related to derivatives. See Note 11 — Derivatives and Hedging Activities for additional information about our pledged collateral and other credit-risk-related contingent features.

Legal Proceedings. We are subject to various legal proceedings arising in the normal course of business from time to time. We would record an accrual for a loss contingency when it is probable that a loss has been incurred and the amount can be reasonably estimated. Management does not anticipate that the ultimate liability, if any, arising out of these matters will have a material effect on our financial condition, results of operations, or cash flows.

Note 19 — Transactions with Shareholders

Shareholder Concentrations. We consider shareholder concentrations as members or nonmembers whose capital stock holdings (including mandatorily redeemable capital stock) are in excess of 10 percent of total capital stock outstanding. The following tables present transactions with shareholders whose holdings of capital stock exceed 10 percent or more of total capital stock outstanding at March 31, 2017, and December 31, 2016 (dollars in thousands):

36

Table of Contents	FEDERAL HOME LOAN BANK OF BOSTON
	NOTES TO FINANCIAL STATEMENTS
	(unaudited)

	Capital Stock Outstanding		Percent of Total		Par Value of Advances		Percent of Total Par Value of Advances		Total Accrued Interest Receivable		Percent of Total Accrued Interest Receivable on Advances
As of March 31, 2017
Citizens Bank, N.A.	$	352,223	14.1	%	$	5,260,581	14.8	%	$	2,345	6.2	%
As of December 31, 2016
Citizens Bank, N.A.	$	357,508	14.6	%	$	7,260,446	18.6	%	$	2,625	7.3	%

We held sufficient collateral to support the advances to the above institution such that we do not expect to incur any credit losses on these advances.

We recognized interest income on outstanding advances and fees on letters of credit from Citizens Bank, N.A. during the three months endedMarch 31, 2017 and 2016, as follows (dollars in thousands):

	For the Three Months Ended March 31,
Citizens Bank, N.A.	2017		2016
Interest income on advances	$	14,111	$	8,204
Fees on letters of credit	745		840

Transactions with Directors' Institutions. We provide, in the ordinary course of business, products and services to members whose officers or directors serve on our board of directors. In accordance with FHFA regulations, transactions with directors' institutions are conducted on the same terms as those with any other member.

The following table presents the outstanding balances of capital stock, advances, and accrued interest receivable with members whose officers or directors serve on our board of directors, and those balances as a percentage of our total balance as reported on our statement of condition (dollars in thousands):

	Capital Stock Outstanding		Percent of Total		Par Value of Advances		Percent of Total Par Value of Advances		Total Accrued Interest Receivable		Percent of Total Accrued Interest Receivable on Advances
As of March 31, 2017	$	82,433	3.3	%	$	1,319,925	3.7	%	$	1,564	4.2	%
As of December 31, 2016	91,374		3.7		1,554,753		4.0		1,631		4.5

Note 20 — Subsequent Events

On April 3, 2017, we conducted a partial repurchase of excess capital stock under the Excess Stock Management Program in the amount of $180.2 million.

On April 18, 2017, the board of directors declared a cash dividend at an annualized rate of 4.08 percent based on capital stock balances outstanding during the first quarter of 2017. The dividend, including dividends on mandatorily redeemable capital stock, amounted to $25.2 million and was paid on May 2, 2017.

37

ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Forward-Looking Statements

This report includes statements describing anticipated developments, projections, estimates, or future predictions of ours that are “forward-looking statements.” These statements may use forward-looking terminology such as, but not limited to, “anticipates,” “believes,” “expects,” “plans,” “intends,” “may,” “could,” “estimates,” “assumes,” “should,” “will,” “likely,” or their negatives or other variations on these terms. We caution that, by their nature, forward-looking statements are subject to a number of risks or uncertainties, including the risk factors set forth in Item 1A — Risk Factors in the 2016 Annual Report and Part II — Item 1A — Risk Factors of this quarterly report and the risks set forth below. Accordingly, we caution that actual results could differ materially from those expressed or implied in these forward-looking statements or could impact the extent to which a particular objective, projection, estimate, or prediction is realized. As a result, you are cautioned not to place undue reliance on such statements. These forward-looking statements speak only as of the date they are made, and we do not undertake to update any forward-looking statement herein or that may be made from time to time on our behalf.

Forward-looking statements in this report may include, among others, our expectations for:

• income, retained earnings, and dividend payouts;

• repurchases of stock in excess of a shareholder’s total stock investment requirement (excess stock);

• credit losses on advances and investments in mortgage loans and ABS, particularly private-label MBS;

• balance-sheet changes and components thereof, such as changes in advances balances and the size of our portfolio of investments in mortgage loans;

• our minimum retained earnings target; and

• the interest-rate environment in which we do business.

Actual results may differ from forward-looking statements for many reasons, including, but not limited to:

• changes in interest rates, the rate of inflation (or deflation), housing prices, employment rates, and the general economy, including changes resulting from changes in U.S. fiscal policy or ratings of the U.S. federal government;

• changes in demand for our advances and other products;

• the willingness of our members to do business with us;

• changes in the financial health of our members;

• changes in borrower defaults on mortgage loans;

• changes in the credit performance and loss severities of our investments;

• changes in prepayment rates on advances and investments;

• the value of collateral we hold as security for obligations of our members and counterparties;

• issues and events across the FHLBank System and in the political arena that may lead to executive branch, legislative, regulatory, judicial, or other developments impacting demand for COs, our financial obligations with respect to COs, our ability to access the capital markets, our members, the manner in which we operate, or the organization and structure of the FHLBank System;

• competitive forces including, without limitation, other sources of funding available to our members, other entities borrowing funds in the capital markets, and our ability to attract and retain skilled employees;

• the pace of technological change and our ability to develop and support technology and information systems sufficient to manage the risks of our business effectively;

• the loss of members due to, among other ways, member withdrawals, mergers and acquisitions;

• changes in investor demand for COs;

• changes in the terms or availability of derivatives and other agreements we enter into in support of our business operations;

• the timing and volume of market activity;

• the volatility of reported results due to changes in the fair value of certain assets and liabilities, including, but not limited to, private-label MBS;

• our ability to introduce new (or adequately adapt current) products and services and successfully manage the risks associated with our products and services, including new types of collateral used to secure advances;

38

• losses arising from litigation filed against us or one or more of the other FHLBanks;

• gains resulting from legal claims we have;

• losses arising from our joint and several liability on COs;

• significant business disruptions resulting from vendor or third-party failure, natural or other disasters, cyberincidents, acts of war, or terrorism; and

• new accounting standards.

The Management's Discussion and Analysis of Financial Condition and Results of Operations should be read in conjunction with our interim financial statements and notes, which begin on page three, and the 2016 Annual Report.

EXECUTIVE SUMMARY

For the three months endedMarch 31, 2017, net income increased to $37.4 million, from $29.5 million for the three months endedMarch 31, 2016. The increase was primarily due to a $6.5 million increase in net interest income after provision for credit losses, and a $6.3 million increase in gains on derivatives and hedging activities, partially offset by a $3.3 million increase in net unrealized losses on trading securities. Our return on average equity was 4.56 percent for the three months endedMarch 31, 2017, compared with 3.88 percent for the three months endedMarch 31, 2016, an increase of 68 basis points. Our financial condition continued to strengthen with retained earnings of $1.2 billion at March 31, 2017, a surplus of $530.8 million over our minimum retained earnings target, as we continued to satisfy all regulatory capital requirements as of March 31, 2017.

On April 18, 2017, our board of directors declared a cash dividend that was equivalent to an annual yield of 4.08 percent, the approximate daily average three-month London Interbank Offered Rate (LIBOR) yield for the first quarter of 2017 plus 300 basis points.

Net Interest Margin

For the three months endedMarch 31, 2017, net interest margin was 0.43 percent, an increase of four basis points from the three months endedMarch 31, 2016. The improvement of net interest margin benefited from improvement in net interest spread and modest increase in interest rates, though interest rates remained low compared to historical standards as discussed under — Economic Conditions — Interest-Rate Environment.

Advances Balances

We continue to deliver on our primary mission, supplying liquidity and funding to our members, with advances balances of $35.5 billion at March 31, 2017, down from $39.1 billion at December 31, 2016. The decrease in advances was broad based, with variable-rate advances and short-term fixed rate advances most significantly represented. We cannot predict whether this trend will continue.

Accretable yields from investments in private-label MBS

For the three months endedMarch 31, 2017 and 2016, we recognized $8.6 million and $9.4 million, respectively, in interest income resulting from the increased accretable yields of certain private-label MBS for which we had previously recognized credit losses. For a discussion of this accounting treatment, see Item 8 — Financial Statements and Supplementary Data — Notes to the Financial Statements — Note 1 — Summary of Significant Accounting Policies — Investment Securities — Other-than-Temporary Impairment — Interest Income Recognition in the 2016 Annual Report.

The amortized cost of our total investments in private-label MBS and ABS backed by home-equity loans has declined to $1.0 billion at March 31, 2017. Other-than-temporary impairment credit losses were $418,000 for the three months endedMarch 31, 2017.

Repurchases of Excess Stock

Under the excess stock management program adopted by our board of directors on July 24, 2015, we repurchased $134.6 million of excess stock from shareholders on a pro rata basis in the quarter ending March 31, 2017. In addition, in April 2017 we repurchased $180.2 million of excess stock under the excess stock management program and announced that at close of business on May 31, 2017, we would reduce the activity-based stock investment requirement (ABSIR) for certain advances and on June 1, 2017, we would initiate daily repurchases of excess stock under different parameters. For additional information see

39

— Item 1 — Business — Capital Resources in the 2016 Annual Report, Item 7 — Management’s Discussion and Analysis of Financial Condition and Results of Operations — Liquidity and Capital Resources — Internal Capital Practices and Policies — Excess Stock Management Program in the 2016 Annual Report and as further described below under Liquidity and Capital Resources — Internal Capital Practices and Policies.

Regulatory Developments

The FHFA has issued or proposed regulations as described in — Legislative and Regulatory Developments. Such developments affect the way we conduct business and could impact the way we satisfy our mission as well as the value of our membership. Recent executive branch efforts at regulatory reform may affect the development or implementation of new regulations affecting us.

ECONOMIC CONDITIONS

Economic Environment

In the first quarter of 2017, the U.S. labor market continued to strengthen, and economic activity continued to expand at a moderate pace. Job gains were strong in January and February at over 200,000 jobs added per month and slowed in March with the addition of 98,000 jobs. At March 31, 2017, the nationwide unemployment rate had declined slightly to 4.5 percent. Household spending has continued to rise moderately and business investment has increased slightly. Real Gross Domestic Product increased at an annual rate of 0.7 percent in the first quarter.

Interest-Rate Environment

On March 15, 2017, the Federal Open Market Committee (FOMC) announced that it had decided to increase the target range for the federal funds rate to 0.75 percent to 1 percent. Following the announcement, long-term Treasury yields declined slightly.On May 3, 2017, the FOMC announced that the target range would remain unchanged but that it expects economic conditions to develop “in a manner that will warrant gradual increases in the federal funds rate.”

The following chart illustrates the interest-rate environment.

	Three Months Average		Ending rate
	March 31, 2017	March 31, 2016	March 31, 2017	December 31, 2016
Federal funds effective rate	0.70%	0.37%	0.82%	0.55%
3-month LIBOR	1.07%	0.63%	1.15%	1.00%
3-month U.S. Treasury yield	0.59%	0.28%	0.75%	0.50%
2-year U.S. Treasury yield	1.23%	0.83%	1.25%	1.19%
5-year U.S. Treasury yield	1.94%	1.36%	1.92%	1.93%
10-year U.S. Treasury yield	2.44%	1.91%	2.39%	2.44%

________________

Source: Bloomberg

SELECTED FINANCIAL DATA

The following financial highlights for the statement of condition for December 31, 2016, have been derived from our audited financial statements. Financial highlights for the quarter-ends have been derived from our unaudited financial statements.

40

SELECTED FINANCIAL DATA
STATEMENT OF CONDITION
(dollars in thousands)
	March 31, 2017			December 31, 2016			September 30, 2016			June 30, 2016			March 31, 2016
Statement of Condition
Total assets	$	56,568,802		$	61,545,586		$	60,543,301		$	62,160,154		$	58,669,046
Investments(1)	17,215,779			18,031,331			19,264,484			19,676,487			20,319,265
Advances	35,479,424			39,099,339			37,195,148			38,241,920			34,524,912
Mortgage loans held for portfolio, net(2)	3,675,598			3,693,894			3,714,283			3,628,464			3,575,262
Deposits and other borrowings	490,268			482,163			610,783			634,995			562,622
Consolidated obligations:
Bonds	27,978,423			27,171,434			27,345,898			27,139,771			27,961,818
Discount notes	24,179,050			30,053,964			28,725,374			30,483,963			26,358,590
Total consolidated obligations	52,157,473			57,225,398			56,071,272			57,623,734			54,320,408
Mandatorily redeemable capital stock	32,677			32,687			33,812			35,076			35,244
Class B capital stock outstanding-putable(3)	2,458,667			2,411,306			2,333,262			2,353,698			2,301,039
Unrestricted retained earnings	994,011			987,711			962,798			955,126			938,287
Restricted retained earnings	236,755			229,275			217,343			210,031			200,534
Total retained earnings	1,230,766			1,216,986			1,180,141			1,165,157			1,138,821
Accumulated other comprehensive loss	(343,572		)	(383,514		)	(360,644		)	(358,342		)	(390,430		)
Total capital	3,345,861			3,244,778			3,152,759			3,160,513			3,049,430
Other Information
Total regulatory capital ratio(4)	6.58		%	5.95		%	5.86		%	5.72		%	5.92		%

_______________________

(1) Investments include available-for-sale securities, held-to-maturity securities, trading securities, interest-bearing deposits, securities purchased under agreements to resell and federal funds sold.

(2) The allowance for credit losses amounted to $625,000, $650,000, $800,000, $900,000, and $1.0 million,for the quarters ended March 31, 2017, December 31, 2016, September 30, 2016, June 30, 2016, and March 31, 2016, respectively.

(3) Capital stock is putable at the option of a member, subject to applicable restrictions.

(4) Total regulatory capital ratio is capital stock (including mandatorily redeemable capital stock) plus total retained earnings as a percentage of total assets. See Item 1 — Notes to Financial Statements — Note 15 — Capital.

41

SELECTED FINANCIAL DATA
RESULTS OF OPERATIONS AND OTHER INFORMATION
(dollars in thousands)
	Results of Operations for the Three Months Ended
	March 31, 2017			December 31, 2016			September 30, 2016			June 30, 2016			March 31, 2016
Net interest income	$	62,504		$	76,287		$	64,779		$	54,579		$	56,104
(Reduction of) provision for credit losses	(51		)	(83		)	(94		)	(111		)	11
Net impairment losses on held-to-maturity securities recognized in earnings	(418		)	(589		)	(371		)	(1,003		)	(1,347		)
Litigation settlements	—			19,627			—			19,584			—
Other income (loss)	427			1,272			(3,072		)	(1,787		)	(2,990		)
Other expense	20,974			30,351			20,773			18,688			18,934
AHP assessments	4,192			6,666			4,099			5,312			3,320
Net income	$	37,398		$	59,663		$	36,558		$	47,484		$	29,502
Other Information
Dividends declared	$	23,619		$	22,818		$	21,574		$	21,148		$	19,529
Dividend payout ratio	63.16		%	38.24		%	59.01		%	44.54		%	66.20		%
Weighted-average dividend rate(1)	3.94			3.80			3.65			3.63			3.42
Return on average equity(2)	4.56			7.38			4.55			6.09			3.88
Return on average assets	0.25			0.40			0.25			0.32			0.20
Net interest margin(3)	0.43			0.51			0.45			0.37			0.39
Average equity to average assets	5.55			5.39			5.48			5.31			5.20

_______________________

(1) Weighted-average dividend rate is the dividend amount declared divided by the average daily balance of capital stock eligible for dividends during the preceding quarter.

(2) Return on average equity is net income divided by the total of the average daily balance of outstanding Class B capital stock, accumulated other comprehensive loss, and total retained earnings.

(3) Net interest margin is net interest income before provision for credit losses as a percentage of average earning assets.

RESULTS OF OPERATIONS

Net Income

Net income increased to $37.4 million for the three months endedMarch 31, 2017, from $29.5 million for the three months endedMarch 31, 2016. The reasons for the increase are discussed above within — Executive Summary.

Net Interest Income

Net interest income after provision for credit losses for the three months endedMarch 31, 2017 was $62.6 million, compared with $56.1 million for the same period in 2016. The $6.5 million increase in net interest income after provision for credit losses was primarily attributable to a $1.0 billion increase in average earning assets, from $58.6 billion for the three months endedMarch 31, 2016, to $59.6 billion for the three months endedMarch 31, 2017. The increase in average earning assets was driven by a $2.5 billion increase in average advances balances partially offset by a $1.6 billion decrease in average investments balances. For additional information see — Rate and Volume Analysis. Net interest income also benefited from a slight increase in net interest margin as discussed under — Executive Summary. Offsetting the increase to net interest income after provision for credit losses was a $2.2 milliondecrease in net prepayment fees from advances and investments from $2.4 million in the three months endedMarch 31, 2016, to $229,000 in the three months endedMarch 31, 2017.

Net interest spread was 0.36 percent for the three months endedMarch 31, 2017, a two basis point increase from the same period in 2016, and net interest margin was 0.43 percent, a four basis point increase from the same period in 2016. The increase in net interest spread reflects an 18 basis point increase in the average yield on earning assets and a 16 basis point increase in the average yield on interest-bearing liabilities.

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The following table presents major categories of average balances, related interest income/expense, and average yields for interest-earning assets and interest-bearing liabilities. Our primary source of earnings is net interest income, which is the interest earned on advances, mortgage loans, and investments less interest paid on COs, deposits, and other sources of funds.

Net Interest Spread and Margin (dollars in thousands)
	For the Three Months Ended March 31,
	2017							2016
	Average Balance			Interest Income / Expense		Average Yield(1)		Average Balance			Interest Income / Expense		Average Yield(1)
Assets
Advances	$	37,753,835		$	106,747	1.15	%	$	35,283,805		$	80,288	0.92	%
Securities purchased under agreements to resell	3,065,667			4,418		0.58		4,017,505			3,193		0.32
Federal funds sold	5,877,000			10,284		0.71		6,270,253			5,616		0.36
Investment securities(2)	9,155,405			47,636		2.11		9,296,338			49,876		2.16
Mortgage loans	3,673,168			29,947		3.31		3,577,828			31,076		3.49
Other earning assets	72,618			59		0.33		160,183			107		0.27
Total interest-earning assets	59,597,693			199,091		1.35		58,605,912			170,156		1.17
Other non-interest-earning assets	403,446							314,104
Fair-value adjustments on investment securities	(56,436		)					(22,874		)
Total assets	$	59,944,703		$	199,091	1.35	%	$	58,897,142		$	170,156	1.16	%
Liabilities and capital
Consolidated obligations
Discount notes	$	27,681,790		$	37,579	0.55	%	$	27,874,080		$	22,697	0.33	%
Bonds	27,763,168			98,175		1.43		26,635,280			90,860		1.37
Deposits	451,900			502		0.45		479,533			115		0.10
Mandatorily redeemable capital stock	32,683			329		4.08		41,910			379		3.64
Other borrowings	1,111			2		0.73		1,232			1		0.33
Total interest-bearing liabilities	55,930,652			136,587		0.99		55,032,035			114,052		0.83
Other non-interest-bearing liabilities	688,382							804,824
Total capital	3,325,669							3,060,283
Total liabilities and capital	$	59,944,703		$	136,587	0.92	%	$	58,897,142		$	114,052	0.78	%
Net interest income				$	62,504						$	56,104
Net interest spread						0.36	%						0.34	%
Net interest margin						0.43	%						0.39	%

_________________________

(1) Yields are annualized

(2) The average balances of held-to-maturity securities and available-for-sale securities are reflected at amortized cost; therefore the resulting yields do not give effect to changes in fair value or the noncredit component of a previously recognized other-than-temporary impairment reflected in accumulated other comprehensive loss.

Rate and Volume Analysis

Changes in both average balances (volume) and interest rates influence changes in net interest income and net interest margin. The following table summarizes changes in interest income and interest expense for the three months endedMarch 31, 2017 and 2016. Changes in interest income and interest expense that are not identifiable as either volume-related or rate-related, but are equally attributable to both volume and rate changes, have been allocated to the volume and rate categories based upon the proportion of the absolute value of the volume and rate changes.

43

Rate and Volume Analysis (dollars in thousands)
	For the Three Months Ended  March 31, 2017 vs. 2016
	Increase (Decrease) due to
	Volume			Rate			Total
Interest income
Advances	$	5,925		$	20,534		$	26,459
Securities purchased under agreements to resell	(895		)	2,120			1,225
Federal funds sold	(373		)	5,041			4,668
Investment securities	(748		)	(1,492		)	(2,240		)
Mortgage loans	813			(1,942		)	(1,129		)
Other earning assets	(68		)	20			(48		)
Total interest income	4,654			24,281			28,935
Interest expense
Consolidated obligations
Discount notes	(158		)	15,040			14,882
Bonds	3,924			3,391			7,315
Deposits	(7		)	394			387
Mandatorily redeemable capital stock	(90		)	40			(50		)
Other borrowings	—			1			1
Total interest expense	3,669			18,866			22,535
Change in net interest income	$	985		$	5,415		$	6,400

Average Balance of Advances Outstanding

The average balance of total advances increased $2.5 billion, or 7.0 percent, for the three months endedMarch 31, 2017, compared with the same period in 2016. However, advances balances declined by $3.6 billion over the three month period ended March 31, 2017. We cannot predict whether this trend will continue. The following table summarizes average balances of advances outstanding during the three months endedMarch 31, 2017 and 2016, by product type.

44

Average Balance of Advances Outstanding by Product Type (dollars in thousands)
	For the Three Months Ended March 31,
	2017			2016
Fixed-rate advances—par value
Long-term	$	13,300,970		$	13,699,962
Short-term	11,692,882			10,888,199
Putable	2,634,528			1,947,964
Overnight	1,435,293			931,167
Amortizing	857,935			872,937
All other fixed-rate advances	46,333			96,615
	29,967,941			28,436,844
Variable-rate indexed advances—par value
Simple variable (1)	7,246,067			6,388,990
Putable	519,883			255,072
All other variable-rate indexed advances	42,749			43,526
	7,808,699			6,687,588
Total average par value	37,776,640			35,124,432
Net premiums	(4,635		)	5,950
Market value of bifurcated derivatives	(211		)	3,183
Hedging adjustments	(17,959		)	150,240
Total average balance of advances	$	37,753,835		$	35,283,805

_____________________

(1) Includes floating-rate advances that may be contractually prepaid by the borrower on a floating-rate reset date without incurring prepayment or termination fees.

In addition, the average balance of fixed-rate advances that were hedged with interest-rate swaps to yield an effective floating rate totaled $9.5 billion for the three months endedMarch 31, 2017. Therefore, a significant portion of our advances, including overnight advances, short-term fixed-rate advances, fixed-rate putable advances, certain fixed-rate bullet advances, and variable-rate advances, either earn a short-term interest rate or are swapped to a short-term index, resulting in yields that closely follow short-term market interest-rate trends. The average balance of all such advances totaled $30.4 billion for the three months endedMarch 31, 2017, representing 80.6 percent of the total average balance of advances outstanding during the three months endedMarch 31, 2017. The average balance of all such advances totaled $27.2 billion for the three months endedMarch 31, 2016, representing 77.1 percent of the total average balance of advances outstanding during the three months endedMarch 31, 2016.

For the three months endedMarch 31, 2017 and 2016, net prepayment fees on advances and investments were $229,000 and $2.4 million, respectively. Prepayment-fee income is unpredictable and inconsistent from period to period, occurring only when advances and investments are prepaid prior to the scheduled maturity or repricing dates, and generally when prevailing reinvestment yields are lower than those of the prepaid advances.

Average Balance of Investments

Average short-term money-market investments, consisting of interest-bearing deposits, securities purchased under agreements to resell, and federal funds sold, decreased $1.4 billion, or 13.7 percent, for the three months endedMarch 31, 2017, compared with the same period in 2016. The yield earned on short-term money-market investments is highly correlated to short-term market interest rates. As a result of the FOMC’s target range for the federal funds rate, average yields on overnight federal funds sold increased from 0.36 percent during the three months endedMarch 31, 2016 to 0.71 percent during the three months endedMarch 31, 2017, while average yields on securities purchased under agreements to resell increased from 0.32 percent for the three months endedMarch 31, 2016 to 0.58 percent for the three months endedMarch 31, 2017. These investments are used for liquidity management and to manage our leverage ratio in response to fluctuations in other asset balances. For the three

45

months endedMarch 31, 2017, average balances of securities purchased under agreements to resell decreased $1.0 billion and average balances of federal funds sold decreased $393.3 million in comparison to the three months endedMarch 31, 2016.

Average investment-securities balances decreased $140.9 million, or 1.5 percent, for the three months endedMarch 31, 2017, compared with the same period in 2016, a decrease consisting primarily of a $546.9 million decrease in MBS and a $408.0 million increase in U.S. Treasury obligations.

Average Balance of COs

Average CO balances increased$935.6 million, or 1.7 percent, for the three months endedMarch 31, 2017, compared with the same period in 2016, resulting from our increased funding needs principally due to the increase in our average advances balances. This overall increase consisted of an increase of $1.1 billion in CO bonds and a decrease of $192.3 million in CO discount notes.

The average balance of CO discount notes represented approximately 49.9 percent of total average COs during the three months endedMarch 31, 2017, compared with 51.1 percent of total average COs during the three months endedMarch 31, 2016. The average balance of CO bonds represented 50.1 percent and 48.9 percent of total average COs outstanding during the three months endedMarch 31, 2017 and 2016, respectively.

Impact of Derivatives and Hedging Activities

Net interest income includes interest accrued on interest-rate-exchange agreements that are associated with advances, investments, deposits, and debt instruments that qualify for hedge accounting. We generally use derivative instruments that qualify for hedge accounting as interest-rate risk-management tools. These derivatives serve to stabilize net interest income and net interest margin when interest rates fluctuate. Accordingly, the impact of derivatives on net interest income and net interest margin should be viewed in the overall context of our risk-management strategy. The following tables show the net effect of derivatives and hedging activities on net interest income, net gains (losses) on derivatives and hedging activities, and net unrealized gains (losses) on trading securities for the three months endedMarch 31, 2017 and 2016 (dollars in thousands).

	For the Three Months Ended March 31, 2017
Net Effect of Derivatives and Hedging Activities	Advances			Investments			Mortgage Loans			CO Bonds			Other		Total
Net interest income
Amortization / accretion of hedging activities in net interest income (1)	$	(683	)	$	—		$	(81	)	$	(103	)	$	—	$	(867	)
Net interest settlements included in net interest income (2)	(13,405		)	(8,341		)	—			4,641			—		(17,105		)
Total net interest income	(14,088		)	(8,341		)	(81		)	4,538			—		(17,972		)
Net gains (losses) on derivatives and hedging activities
Gains (losses) on fair-value hedges	642			460			—			(1,761		)	—		(659		)
Gains on cash-flow hedges	—			—			—			134			—		134
(Losses) gains on derivatives not receiving hedge accounting	(5		)	154			—			4			—		153
Mortgage delivery commitments	—			—			357			—			—		357
Other (3)	—			—			—			—			51		51
Net gain (losses) on derivatives and hedging activities	637			614			357			(1,623		)	51		36
Subtotal	(13,451		)	(7,727		)	276			2,915			51		(17,936		)
Net losses on trading securities	—			(1,414		)	—			—			—		(1,414		)
Total net effect of derivatives and hedging activities	$	(13,451	)	$	(9,141	)	$	276		$	2,915		$	51	$	(19,350	)

46

_____________________

(1) Represents the amortization/accretion of hedging fair-value adjustments and cash-flow hedge amortization reclassified from accumulated other comprehensive loss.

(2) Represents interest income/expense on derivatives included in net interest income.

(3) Amount in Other includes the price alignment amount on derivatives for which variation margin is characterized as a daily settlement amount, as further described in Item 1 —Notes to the Financial Statements — Note 11 — Derivatives and Hedging Activities.

	For the Three Months Ended March 31, 2016
Net Effect of Derivatives and Hedging Activities	Advances			Investments			Mortgage Loans			CO Bonds			Total
Net interest income
Amortization / accretion of hedging activities in net interest income (1)	$	(831	)	$	—		$	(93	)	$	(2,224	)	$	(3,148	)
Net interest settlements included in net interest income (2)	(30,124		)	(9,011		)	—			8,072			(31,063		)
Total net interest income	(30,955		)	(9,011		)	(93		)	5,848			(34,211		)
Net (losses) gains on derivatives and hedging activities
(Losses) gains on fair-value hedges	(223		)	384			—			(3,194		)	(3,033		)
Losses on cash-flow hedges	—			—			—			(346		)	(346		)
(Losses) gains on derivatives not receiving hedge accounting (3)	(21		)	(3,491		)	—			40			(3,472		)
Mortgage delivery commitments	—			—			616			—			616
Net (losses) gains on derivatives and hedging activities	(244		)	(3,107		)	616			(3,500		)	(6,235		)
Subtotal	(31,199		)	(12,118		)	523			2,348			(40,446		)
Net gains on trading securities	—			1,873			—			—			1,873
Total net effect of derivatives and hedging activities	$	(31,199	)	$	(10,245	)	$	523		$	2,348		$	(38,573	)

_____________________

(1) Represents the amortization/accretion of hedging fair-value adjustments.

(2) Represents interest income/expense on derivatives included in net interest income.

Interest paid and received on interest-rate-exchange agreements that are economic hedges is classified as net losses on derivatives and hedging activities in other income. As shown under — Other Income (Loss) below, interest accruals on derivatives classified as economic hedges totaled a net expense of $1.3 million and $1.5 million for the three months endedMarch 31, 2017 and 2016, respectively.

Other Income (Loss)

The following table presents a summary of other income (loss) for the three months endedMarch 31, 2017 and 2016. Additionally, detail on the components of net gains (losses) on derivatives and hedging activities is provided, indicating the source of these gains and losses by type of hedging relationship and hedge accounting treatment.

47

Other Income (Loss) (dollars in thousands)
	For the Three Months Ended March 31,
	2017			2016
Gains (losses) on derivatives and hedging activities:
Net losses related to fair-value hedge ineffectiveness	$	(659	)	$	(3,033	)
Net gains (losses) related to cash-flow hedge ineffectiveness	134			(346		)
Net unrealized gains (losses) related to derivatives not receiving hedge accounting associated with:
Advances	(5		)	(21		)
Trading securities	1,442			(1,921		)
CO Bonds	29			8
Mortgage delivery commitments	357			616
Net interest-accruals related to derivatives not receiving hedge accounting	(1,313		)	(1,538		)
Other(1)	51			—
Net gains (losses) on derivatives and hedging activities	36			(6,235		)
Net other-than-temporary impairment credit losses on held-to-maturity securities recognized in income	(418		)	(1,347		)
Loss on early extinguishment of debt	—			(558		)
Service-fee income	2,012			1,968
Net unrealized (losses) gains on trading securities	(1,414		)	1,873
Other	(207		)	(38		)
Total other income (loss)	$	9		$	(4,337	)

______________

(1) Consists of price alignment amount on derivatives for which variation margin is characterized as a daily settlement amount.

FINANCIAL CONDITION

Advances

At March 31, 2017, the advances portfolio totaled $35.5 billion, a decrease of $3.6 billion compared with $39.1 billion at December 31, 2016.

The following table summarizes advances outstanding by product type at March 31, 2017, and December 31, 2016.

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Advances Outstanding by Product Type (dollars in thousands)
	March 31, 2017				December 31, 2016
	Par Value		Percent of Total		Par Value		Percent of Total
Fixed-rate advances
Long-term	$	13,289,508	37.4	%	$	13,051,558	33.4	%
Short-term	10,750,997		30.3		12,260,502		31.3
Putable	2,679,550		7.6		2,735,050		7.0
Overnight	1,284,298		3.6		1,577,162		4.0
Amortizing	899,339		2.5		861,920		2.2
All other fixed-rate advances	50,000		0.1		40,000		0.1
	28,953,692		81.5		30,526,192		78.0
Variable-rate advances
Simple variable (1)	5,905,783		16.6		7,895,783		20.2
Putable	578,500		1.6		616,000		1.6
All other variable-rate indexed advances	82,035		0.3		76,880		0.2
	6,566,318		18.5		8,588,663		22.0
Total par value	$	35,520,010	100.0	%	$	39,114,855	100.0	%

_____________________

(1) Includes floating-rate advances that may be contractually prepaid by the borrower on a floating-rate reset date without incurring prepayment or termination fees.

See Item 1 — Notes to the Financial Statements — Note 8 — Advances for disclosures relating to redemption terms of the advances portfolio.

At March 31, 2017, we had advances outstanding to 314, or 70.4 percent, of our 446 members. At December 31, 2016, we had advances outstanding to 315, or 70.5 percent, of our 447 members.

Advances Credit Risk

We endeavor to minimize credit risk on advances by monitoring the financial condition of our borrowers and by holding sufficient collateral to protect the Bank from credit losses. All pledged collateral is subject to haircuts assigned based on our opinion of the risk that such collateral presents. We are prohibited by Section 10(a) of the FHLBank Act from making advances without sufficient collateral to secure the advance. We have never experienced a credit loss on an advance.

We assign each non-insurance company borrower to one of the following three credit status categories based primarily on our assessment of the borrower's overall financial condition and other factors:

• Category-1: members that are generally in satisfactory financial condition;

• Category-2: members that show weakening financial trends in key financial indices and/or regulatory findings; and

• Category-3: members with financial weaknesses that present an elevated level of concern. We also place housing associates and non-member borrowers in Category-3.

We monitor the financial condition of our insurance company members quarterly. We lend to them based on our assessment of their financial condition and their pledge of sufficient amounts of eligible collateral.

The following table provides information regarding advances outstanding with our borrowers in Category-1, Category-2, Category-3, and insurance company members, at March 31, 2017, along with their corresponding collateral balances.

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Advances Outstanding by Borrower Credit Status Category As of March 31, 2017 (dollars in thousands)
	Number of Borrowers	Par Value of Advances Outstanding		Discounted Collateral		Ratio of Discounted Collateral to Advances
Category-1	269	$	32,090,708	$	82,363,243	256.7	%
Category-2	16	441,964		861,795		195.0
Category-3	16	431,321		665,785		154.4
Insurance companies	21	2,556,017		3,838,770		150.2
Total	322	$	35,520,010	$	87,729,593	247.0	%

The method by which a borrower pledges collateral is dependent upon the category to which it is assigned and on the type of collateral that the borrower pledges. Moreover, borrowers in Category-1 are permitted to specifically list and identify single-family residential mortgage loans at a lower discount than is allowed if the collateral is not specifically listed and identified.

Based on the financial reviews and other conditions of the members, the Bank may adjust the credit status category of a member from time to time. Due to their weaker profile, the Bank requires Category-3 members to deliver collateral to the Bank or its custodian. Based upon the method by which borrowers pledge collateral to us, the following table shows the total potential lending value of the collateral that borrowers have pledged to us, net of our collateral valuation discounts as of March 31, 2017.

Collateral by Pledge Type (dollars in thousands)
	Discounted Collateral
Collateral not specifically listed and identified	$	29,094,547
Collateral specifically listed and identified	53,134,925
Collateral delivered to us	11,866,724

We accept nontraditional and subprime loans that are underwritten in accordance with applicable regulatory guidance as eligible collateral for our advances as discussed under Item 7 — Management's Discussion and Analysis of Financial Condition and Results of Operations — Financial Condition — Advances Credit Risk in the 2016 Annual Report. At both March 31, 2017, and December 31, 2016, the amount of pledged nontraditional and subprime loan collateral was nine percent of total member discounted collateral.

We have not recorded any allowance for credit losses on advances at March 31, 2017, and December 31, 2016, for the reasons discussed in Item 1 — Notes to the Financial Statements — Note 10 — Allowance for Credit Losses.

The following table presents the top five advance-borrowing institutions at March 31, 2017, and the interest earned on outstanding advances to such institutions for the three months endedMarch 31, 2017.

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Top Five Advance-Borrowing Institutions (dollars in thousands)
	March 31, 2017
Name	Par Value of Advances		Percent of Total Par Value of Advances		Weighted-Average Rate (1)		Advances Interest Income for the Three Months Ended March 31, 2017
Citizens Bank, N.A.	$	5,260,581	14.8	%	1.04	%	$	14,111
Webster Bank, N.A.	1,922,823		5.4		1.26		5,729
People's United Bank, N.A.	1,904,974		5.4		0.89		4,730
Berkshire Bank	1,247,800		3.5		0.98		2,674
Massachusetts Mutual Life Insurance Co.	1,100,000		3.1		2.14		5,884
Total of top five advance-borrowing institutions	$	11,436,178	32.2	%			$	33,128

_______________________

(1) Weighted-average rates are based on the contract rate of each advance without taking into consideration the effects of interest-rate-exchange agreements that we may use as hedging instruments.

Investments

At March 31, 2017, investment securities and short-term money-market instruments totaled $17.2 billion, a decrease of $815.6 million from December 31, 2016.

Short-term money-market investments decreased $304.0 million to $8.4 billion at March 31, 2017, compared with December 31, 2016. The decrease was attributable to a $3.0 billion decrease in securities purchased under agreements to resell offset by a $2.5 billion increase in federal funds sold and a $246.0 million increase in interest-bearing deposits.

Investment securities declined$511.6 million to $8.8 billion at March 31, 2017, compared with December 31, 2016. The decrease was attributable to a $424.5 million decrease in MBS and a $90.8 million decrease in U.S. Treasury obligations.

Our MBS investment portfolio consists of the following categories of securities as of March 31, 2017, and December 31, 2016. The percentages in the table below are based on carrying value.

Mortgage-Backed Securities
	March 31, 2017		December 31, 2016
Single-family MBS - U.S. government-guaranteed and GSE	67.2	%	67.5	%
Multifamily MBS - U.S. government-guaranteed and GSE	22.3		22.2
Private-label residential MBS	10.3		10.1
ABS backed by home-equity loans	0.2		0.2
Total MBS	100.0	%	100.0	%

Investments Credit Risk

We are subject to credit risk on unsecured investments consisting primarily of short-term (meaning under one year to maturity and currently consisting only of overnight risk) money-market instruments issued by high-quality financial institutions and long-term (original maturity in excess of one year) debentures issued or guaranteed by U.S. agencies, U.S government-owned corporations, GSEs, and supranational institutions. We place short-term funds with large, high-quality financial institutions with long-term credit ratings no lower than single-A (or equivalent) on an unsecured basis. All of these placements currently expire within one day.

In addition to these unsecured short-term investments, we also make secured investments in the form of securities purchased under agreements to resell secured by U.S. Treasury and agency obligations, whose terms to maturity are up to 35 days. We have also invested in and are subject to secured credit risk related to MBS, ABS, and HFA securities that are directly or indirectly supported by underlying mortgage loans.

51

We actively monitor our investments' credit exposures and the credit quality of our counterparties, including assessments of each counterparty's financial performance, capital adequacy, and sovereign support as well as related market signals. We endeavor to reduce or suspend credit limits and/or seek to reduce existing exposures, as appropriate, as a result of these monitoring activities.

Credit ratings of our investments are provided in the following table.

Credit Ratings of Investments at Carrying Value As of March 31, 2017 (dollars in thousands)
	Long-Term Credit Rating (1)
Investment Category	Triple-A		Double-A		Single-A		Triple-B		Below Triple-B		Unrated
Money-market instruments: (2)
Interest-bearing deposits	$	—	$	317	$	246,000	$	—	$	—	$	—
Securities purchased under agreements to resell	—		—		1,000,000		1,999,000		—		—
Federal funds sold	—		1,275,000		3,875,000		—		—		—
Total money-market instruments	—		1,275,317		5,121,000		1,999,000		—		—
Investment securities:
Non-MBS:
U.S. agency obligations	—		1,922		—		—		—		—
U.S. Treasury obligations	—		308,698		—		—		—		—
U.S. government-owned corporations	—		276,616		—		—		—		—
GSEs	—		118,344		—		—		—		—
Supranational institutions	422,339		—		—		—		—		—
HFA securities	27,729		36,125		105,619		—		—		—
Total non-MBS	450,068		741,705		105,619		—		—		—
MBS:
U.S. government guaranteed - single-family (2)	—		137,801		—		—		—		—
U.S. government guaranteed - multifamily(2)	—		511,621		—		—		—		—
GSE – single-family (2)	—		4,920,700		—		—		—		—
GSE – multifamily (2)	—		1,165,965		—		—		—		—
Private-label – residential	—		3,057		15,840		69,481		680,282		5,795
ABS backed by home-equity loans	595		1,136		5,452		1,569		3,776		—
Total MBS	595		6,740,280		21,292		71,050		684,058		5,795
Total investment securities	450,663		7,481,985		126,911		71,050		684,058		5,795
Total investments	$	450,663	$	8,757,302	$	5,247,911	$	2,070,050	$	684,058	$	5,795

_______________________

(1) Ratings are obtained from Moody's, Fitch, Inc. (Fitch), and S&P and are each as of March 31, 2017. If there is a split rating, the lowest rating is used.

(2) The issuer rating is used for these investments, and if a rating is on negative credit watch, the rating in the next lower rating category is used and then the lowest rating is determined.

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At March 31, 2017, our unsecured credit exposure related to money-market instruments and debentures, including accrued interest, was $6.5 billion to 17 counterparties and issuers, of which $5.2 billion was for federal funds sold, $1.1 billion was for debentures issued by GSEs and supranational institutions, and $247.0 million was for interest-bearing deposits.

Private-Label MBS

Of our $7.9 billion in par value of MBS and ABS investments at March 31, 2017, $1.3 billion in par value are private-label MBS and ABS backed by home equity loans, as set forth in the table below:

Unpaid Principal Balance of Private-Label MBS and ABS Backed by Home Equity Loans by Fixed Rate or Variable Rate (dollars in thousands)
	March 31, 2017						December 31, 2016
Private-label MBS	Fixed Rate (1)		Variable Rate (1)		Total		Fixed Rate (1)		Variable Rate (1)		Total
Private-label residential MBS
Prime	$	8,525	$	96,942	$	105,467	$	8,780	$	102,747	$	111,527
Alt-A	17,771		1,115,275		1,133,046		18,808		1,161,415		1,180,223
Total private-label residential MBS	26,296		1,212,217		1,238,513		27,588		1,264,162		1,291,750
ABS backed by home equity loans
Subprime	—		13,394		13,394		—		13,848		13,848
Total par value of private-label MBS	$	26,296	$	1,225,611	$	1,251,907	$	27,588	$	1,278,010	$	1,305,598

_______________________

 (1) The determination of fixed or variable rate is based upon the contractual coupon type of the security.

The following table provides additional information related to our investments in MBS issued by private trusts and ABS backed by home equity loans. The table sets forth the credit ratings and summary credit enhancements associated with our private-label MBS and ABS. Average current credit enhancements as of March 31, 2017 reflect the percentage of subordinated class outstanding balances as of March 31, 2017, to our senior class outstanding balances as of March 31, 2017, weighted by the par value of our respective senior class securities. Average current credit enhancements as of March 31, 2017, are indicative of the ability of subordinated classes to absorb loan collateral lost principal and interest shortfall before senior classes are impacted.

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Private-Label MBS and ABS Backed by Home Equity As of March 31, 2017 (dollars in thousands)
	Total
Par value by credit rating
Triple-A	$	598
Double-A	4,193
Single-A	21,292
Triple-B	71,049
Below Investment Grade
Double-B	31,804
Single-B	52,214
Triple-C	511,764
Double-C	301,030
Single-C	17,824
Single-D	234,327
Unrated	5,812
Total par value	$	1,251,907
Amortized cost	$	970,700
Gross unrealized gains	76,338
Gross unrealized losses	(23,919		)
Fair value	$	1,023,119
Weighted average percentage of fair value to par value	81.72		%
Original weighted average credit support	27.11
Weighted average credit support	8.53
Weighted average collateral delinquency (1)	20.51

_______________________

 (1) Represents loans that are 60 days or more delinquent.

Mortgage Loans

We invest in mortgages through the MPF program. The MPF program is further described under — Mortgage Loans Credit Risk and in Item 1 — Business — Business Lines — Mortgage Loan Finance in the 2016 Annual Report.

As of March 31, 2017, our mortgage loan investment portfolio totaled $3.7 billion, a decrease of $18.3 million from December 31, 2016. We expect continued competition from Fannie Mae and Freddie Mac for loan investment opportunities.

Mortgage Loans Credit Risk

We are subject to credit risk from the mortgage loans in which we invest due to our exposure to the credit risk of the underlying borrowers and the credit risk of the participating financial institutions when the participating financial institutions retain credit-enhancement and/or servicing obligations. For additional information on the credit risks arising from our participation in the MPF program, see Item 7 — Management's Discussion and Analysis of Financial Condition and Results of Operations — Financial Condition — Mortgage Loans — Mortgage Loans Credit Risk in the 2016 Annual Report.

Although our mortgage loan portfolio includes loans throughout the U.S., concentrations of five percent or greater of the outstanding principal balance of our conventional mortgage loan portfolio are shown in the following table:

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State Concentrations by Outstanding Principal Balance
	Percentage of Total Outstanding Principal Balance of Conventional Mortgage Loans
	March 31, 2017		December 31, 2016
Massachusetts	51	%	51	%
Maine	13		13
Wisconsin	8		9
Connecticut	7		7
New Hampshire	6		6
All others	15		14
Total	100	%	100	%

Allowance for Credit Losses on Mortgage Loans. The allowance for credit losses on mortgage loans was $625,000 at March 31, 2017, compared with $650,000 at December 31, 2016.

For information on the determination of the allowance at March 31, 2017, see Item 1 — Notes to the Financial Statements — Note 10 — Allowance for Credit Losses, and for information on our methodology for estimating the allowance, see Item 7 — Management's Discussion and Analysis of Financial Condition and Results of Operations — Critical Accounting Estimates — Allowance for Loan Losses in the 2016 Annual Report.

We place conventional mortgage loans on nonaccrual status when the contractual principal or interest is 90 days or more past due. Accrued interest on nonaccrual loans is reversed against interest income. We monitor the delinquency levels of the mortgage loan portfolio on a monthly basis. Our investments in conventional mortgage loans that are delinquent are shown in the following table:

Delinquent Mortgage Loans (dollars in thousands)
	March 31, 2017		December 31, 2016
Total par value of government loans past due 90 days or more and still accruing interest	$	4,874	$	5,527
Nonaccrual loans, par value	14,745		16,918
Troubled debt restructurings (not included above)	7,058		6,846

Mortgage Insurance Companies. We are exposed to credit risk from supplemental mortgage insurance (SMI) companies that provide credit enhancement in place of the participating financial institution and for primary mortgage insurance coverage (PMI) on individual loans. As of March 31, 2017, we were the beneficiary of PMI coverage of $78.4 million on $309.5 million of conventional mortgage loans, and SMI coverage of $17.4 million on mortgage pools with a total unpaid principal balance of $133.5 million.

We have analyzed our potential loss exposure to all of the mortgage insurance companies and do not expect incremental losses based on these exposures at this time.

Consolidated Obligations

See — Liquidity and Capital Resources for information regarding our COs.

Derivative Instruments

All derivatives are recorded on the statement of condition at fair value and classified as either derivative assets or derivative liabilities. Bilateral and cleared derivatives outstanding are classified as assets or liabilities according to the net fair value of derivatives aggregated by each counterparty. Derivative assets' net fair value, net of cash collateral and accrued interest, totaled $52.7 million and $61.6 million as of March 31, 2017, and December 31, 2016, respectively. Derivative liabilities' net fair value, net of cash collateral and accrued interest, totaled $325.1 million and $357.9 million as of March 31, 2017, and December 31, 2016, respectively.

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The following table presents a summary of the notional amounts and estimated fair values of our outstanding derivatives, excluding accrued interest, and related hedged item by product and type of accounting treatment as of March 31, 2017, and December 31, 2016. The notional amount represents the hypothetical principal basis used to determine periodic interest payments received and paid. However, the notional amount does not represent an actual amount exchanged or our overall exposure to credit and market risk. The hedge designation “fair value” represents the hedge classification for transactions that qualify for hedge-accounting treatment and hedge changes in fair value attributable to changes in the designated benchmark interest rate, which is LIBOR. The hedge designation "cash flow" represents the hedge classification for transactions that qualify for hedge-accounting treatment and hedge the exposure to variability in expected future cash flows. The hedge designation “economic” represents derivative hedging specific or nonspecific assets, liabilities, or firm commitments that does not qualify or was not designated for fair-value or cash-flow hedge accounting, but are acceptable hedging strategies under our risk-management policy.

Hedged Item and Hedge-Accounting Treatment (dollars in thousands)
			March 31, 2017					December 31, 2016
Hedged Item	Derivative	Designation	Notional Amount		Fair  Value			Notional Amount		Fair Value
Advances (1)	Swaps	Fair value	$	9,600,114	$	32,509		$	9,976,494	$	11,504
	Swaps	Economic	907,500		553			857,000		136
Total associated with advances			10,507,614		33,062			10,833,494		11,640
Available-for-sale securities	Swaps	Fair value	611,915		(280,433		)	611,915		(290,312		)
Trading securities	Swaps	Economic	192,000		(7,837		)	192,000		(9,279		)
COs	Swaps	Fair value	7,212,400		(60,370		)	7,627,400		(60,904		)
	Swaps	Economic	—		—			150,000		(30		)
	Forward starting swaps	Cash Flow	527,800		(36,253		)	527,800		(36,250		)
Total associated with COs			7,740,200		(96,623		)	8,305,200		(97,184		)
Total			19,051,729		(351,831		)	19,942,609		(385,135		)
Mortgage delivery commitments			37,827		193			22,524		(101		)
Total derivatives			$	19,089,556	(351,638		)	$	19,965,133	(385,236		)
Accrued interest					(8,248		)			(19,973		)
Netting adjustments, cash collateral, and variation margin for daily settled contracts including related accrued interest					87,496					108,931
Net derivatives					$	(272,390	)			$	(296,278	)
Derivative asset					$	52,693				$	61,598
Derivative liability					(325,083		)			(357,876		)
Net derivatives					$	(272,390	)			$	(296,278	)

 _______________________

(1) As of March 31, 2017, and December 31, 2016, embedded derivatives separated from the advance contract with notional amounts of $907.5 million and $857.0 million, respectively, and fair values of $(576,000) and $(153,000), respectively, are not included in the table.

The following tables provide a summary of our hedging relationships for fair-value hedges of advances and COs that qualify for hedge accounting by year of contractual maturity. Interest accruals on interest-rate-exchange agreements in qualifying hedge relationships are recorded as interest income on advances and interest expense on COs in the statement of operations. The notional amount of derivatives in qualifying fair-value hedge relationships of advances and COs totals $16.8 billion, representing 88.1 percent of all derivatives outstanding as of March 31, 2017. Economic hedges and cash-flow hedges are not included within the two tables below.

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Fair-Value Hedge Relationships of Advances By Year of Contractual Maturity As of March 31, 2017 (dollars in thousands)
											Weighted-Average Yield (4)
	Derivatives					Advances(2)							Derivatives
Maturity	Notional		Fair Value (1)			Hedged Amount		Fair-Value Adjustment(3)			Advances		Receive Floating Rate		Pay Fixed Rate		Net Receive Result
Due in one year or less	$	2,586,800	$	(10,408	)	$	2,586,800	$	10,298		2.34	%	1.07	%	2.22	%	1.19	%
Due after one year through two years	1,703,460		(1,859		)	1,703,460		1,709			1.85		1.08		1.60		1.33
Due after two years through three years	1,444,686		13,987			1,444,686		(13,903		)	1.56		1.06		1.33		1.29
Due after three years through four years	1,404,703		12,488			1,404,703		(12,602		)	1.88		1.07		1.53		1.42
Due after four years through five years	863,715		4,687			863,715		(4,677		)	2.20		1.10		1.78		1.52
Thereafter	1,596,750		13,614			1,596,750		(13,427		)	0.89		1.08		0.51		1.46
Total	$	9,600,114	$	32,509		$	9,600,114	$	(32,602	)	1.82	%	1.07	%	1.55	%	1.34	%

_______________________

(1) Not included in the fair value is $3.0 million of variation margin received for daily settled contracts.

(2) Included in the advances hedged amount are $2.5 billion of putable advances, which would accelerate the termination date of the derivative and the hedged item if the put option is exercised.

(3) The fair-value adjustment of hedged advances represents the amounts recorded for changes in the fair value attributable to changes in the designated benchmark interest rate, LIBOR.

(4) The yield for floating-rate instruments and the floating-rate leg of interest-rate swaps is the coupon rate in effect as of March 31, 2017.

Fair-Value Hedge Relationships of Consolidated Obligations By Year of Contractual Maturity As of March 31, 2017 (dollars in thousands)
										Weighted-Average Yield (4)
	Derivatives					CO Bonds (2)						Derivatives
Year of Maturity	Notional		Fair Value (1)			Hedged Amount		Fair-Value Adjustment(3)		CO Bonds		Receive Fixed Rate		Pay Floating  Rate		Net Pay Result
Due in one year or less	$	2,237,165	$	(1,703	)	$	2,237,165	$	1,785	0.97	%	1.01	%	1.04	%	1.00	%
Due after one year through two years	2,153,935		(13,232		)	2,153,935		12,771		1.04		0.99		1.01		1.06
Due after two years through three years	561,300		(6,013		)	561,300		5,715		1.08		1.10		1.00		0.98
Due after three years through four years	323,000		(2,752		)	323,000		2,598		1.45		1.45		0.98		0.98
Due after four years through five years	1,282,000		(17,252		)	1,282,000		17,032		1.36		1.36		0.92		0.92
Thereafter	655,000		(19,418		)	655,000		19,102		1.68		1.68		0.95		0.95
Total	$	7,212,400	$	(60,370	)	$	7,212,400	$	59,003	1.16	%	1.15	%	0.99	%	1.00	%

_______________________

(1) Not included in the fair value is $6.7 million of variation margin paid for daily settled contracts.

(2) Included in the CO bonds hedged amount are $3.8 billion of callable CO bonds, which would accelerate the termination date of the derivative and the hedged item if the call option is exercised.

(3) The fair-value adjustment of hedged CO bonds represents the amounts recorded for changes in the fair value attributable to changes in the designated benchmark interest rate, LIBOR, plus remaining unamortized premiums or discounts on hedged CO bonds where applicable.

(4) The yield for floating-rate instruments and the floating-rate leg of interest-rate swaps is the coupon rate in effect as of March 31, 2017.

We may engage in derivatives directly with affiliates of certain of our members that act as derivatives dealers to us. These derivatives are entered into for our own risk-management purposes and are not related to requests from our members to enter into such contracts.

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Derivative Instruments Credit Risk. We are subject to credit risk on derivatives, arising from the possibility of counterparty default on the derivative contract. The amount of unsecured credit exposure to derivative counterparty default is the amount by which the replacement cost of the defaulted derivative contract exceeds the value of any collateral held by us (if the counterparty is the net obligor on the derivative contract) or is exceeded by the value of collateral pledged by us to counterparties (if we are the net obligor on the derivative contract). We accept cash and securities collateral in accordance with the terms of the applicable master netting agreement for uncleared derivatives (principal-to-principal derivatives that are not centrally cleared) from counterparties with whom we are in a current positive fair-value position (i.e., we are in the money) by an amount that exceeds an exposure threshold (if any) defined in our master netting agreement with the counterparty. The resulting net exposure at fair value is reflected in the derivatives table below. We pledge cash and securities collateral in accordance with the terms of the applicable master netting agreement for uncleared derivatives to counterparties with whom we are in a current negative fair-value position (i.e., we are out-of-the-money) by an amount that exceeds an exposure threshold (if any) defined in our master netting agreement with the counterparty. From time to time, due to timing differences or derivatives valuation differences between our calculated derivatives values and those of our counterparties, and to the contractual haircuts applied to securities, we pledge to counterparties cash or securities collateral whose fair value is greater than the current negative fair-value positions with them adjusted for any applicable exposure threshold. Similarly, from time to time, due to timing differences or derivatives valuation differences, we receive from counterparties cash or securities collateral whose fair value is less than the current positive fair-value positions with them adjusted for any applicable exposure threshold. We pledge only cash collateral, including initial and variation margin, for cleared derivatives, but may also pledge securities for initial margin as allowed by the applicable DCO and clearing member. The table below details our counterparty credit exposure as of March 31, 2017.

Derivatives Counterparty Current Credit Exposure As of March 31, 2017 (dollars in thousands)
Credit Rating (1)	Notional Amount		Net Derivatives Fair Value Before Collateral			Cash Collateral Pledged to Counterparty and Variation Margin for Daily Settled Contracts		Non-cash Collateral Pledged to Counterparty		Net Credit Exposure to Counterparties
Asset positions with credit exposure:
Uncleared derivatives
Single-A	$	3,630,750	$	(25,778	)	$	26,610	$	—	$	832
Liability positions with credit exposure:
Uncleared derivatives
Single-A	814,750		(5,519		)	—		5,665		146
Triple-B	803,500		(10,876		)	—		11,813		937
Cleared derivatives	9,714,875		(5,675		)	57,334		—		51,659
Total derivative positions with nonmember counterparties to which we had credit exposure	14,963,875		(47,848		)	83,944		17,478		53,574
Mortgage delivery commitments (2)	37,827		202			—		—		202
Total	$	15,001,702	$	(47,646	)	$	83,944	$	17,478	$	53,776
Derivative positions without credit exposure: (3)
Double-A	$	1,147,500
Single-A	727,300
Triple-B	2,213,055
Total derivative positions without credit exposure	$	4,087,855

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_______________________

(1) Uncleared derivatives counterparty ratings are obtained from Moody's, Fitch, and S&P. Each rating classification includes all rating levels within that category. If there is a split rating, the lowest rating is used. In the case where the obligations are unconditionally and irrevocably guaranteed, the rating of the guarantor is used.

(2) Total fair-value exposures related to commitments to invest in mortgage loans are offset by certain pair-off fees. Commitments to invest in mortgage loans are reflected as derivatives. We do not collateralize these commitments. However, should the participating financial institution fail to deliver the mortgage loans as agreed, the participating financial institution is charged a fee to compensate us for the nonperformance.

(3) These represent derivatives positions with counterparties for which we are in a net liability position and for which we have delivered securities collateral to the counterparty in an amount equal to or less than the net derivative liability, or derivative positions with counterparties for which we are in a net asset position and for which the counterparty has delivered collateral to us in an amount that exceeds our net derivative asset.

For information on our approach to the credit risks arising from our use of derivatives, see Item 7 — Management’s Discussion

and Analysis and Results of Operations — Financial Condition — Derivative Instruments — Derivative Instruments Credit

Risk in the 2016 Annual Report.

LIQUIDITY AND CAPITAL RESOURCES

Our financial structure is designed to enable us to expand and contract our assets, liabilities, and capital in response to changes in membership composition and member credit needs. Our primary source of liquidity is our access to the capital markets through CO issuance, which is described in Item 1 — Business — Consolidated Obligations in the 2016 Annual Report. Outstanding COs and the condition of the market for COs are discussed below under — Debt Financing — Consolidated Obligations. Our equity capital resources are governed by our capital plan, certain portions of which are described under — Capital below as well as by applicable legal and regulatory requirements.

Liquidity

Internal Liquidity Sources / Liquidity Management

We have developed a methodology and policies by which we measure and manage the Bank’s short-term liquidity needs based on projected net cash flow and contingent obligations.

Projected Net Cash Flow. We define projected net cash flow as projected sources of funds less projected uses of funds based on contractual maturities or expected option exercise periods, and settlement of committed asset and liabilities, as applicable. For mortgage-related cash flows and callable debt, we incorporate projected prepayments and call exercise.

Structural Liquidity. We define structural liquidity as projected net cash flow (defined above) less assumed secondary uses of funds, for which we assume the following:

• all maturing advances are renewed;

• member overnight deposits are withdrawn at a rate of 50 percent per day;

• outstanding standby letters of credit are drawn down at a rate of 50 percent spread equally over 86 days;

• uncommitted lines of credit are drawn upon at a rate of 10 percent of the previous day's balance; and

• MPF master commitments are funded at a rate of 10 percent of the previous days' total amount on the first day and at a rate of one percent on each day thereafter.

The above assumptions for secondary uses of funds are in excess of our ordinary experience, and therefore represent a more stressful scenario than we expect to experience. We review these assumptions periodically.

This methodology for measuring projected net cash flow and structural liquidity has been established by management to monitor our liquidity position on a daily basis, and to help ensure that we meet all of our obligations as they come due and to meet our members' potential demand for liquidity from us in all cases. We may adjust the amount of liquidity maintained as market conditions change from time to time using projected net cash flow and structural liquidity measurements.

Liquidity Management Action Triggers. We maintain two liquidity management action triggers:

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• if structural liquidity is less than negative $1.0 billion on or before the fifth business day following the measurement date; and

• if projected net cash flow falls below zero on or before the 21^st day following the measurement date.

We did not breach either of these thresholds at any time during the three months endedMarch 31, 2017. If either of these thresholds are breached, then management of the Bank is notified and determines whether any corrective action is necessary.

The following table presents our projected net cash flow and structural liquidity as of March 31, 2017.

Projected Net Cash Flow and Structural Liquidity As of March 31, 2017 (dollars in thousands)
	5 Business Days		21 Days
Uses of funds
Interest payable	$	7,880	$	28,545
Maturing liabilities	4,081,000		11,214,790
Committed asset settlements	15,000		15,000
Capital outflow	257,159		257,159
MPF delivery commitments	37,827		37,827
Other	3,064		3,064
Gross uses of funds	4,401,930		11,556,385
Sources of funds
Interest receivable	37,412		64,814
Maturing or projected amortization of assets	9,741,136		14,393,206
Committed liability settlements	70,820		70,820
Cash and due from banks	258,817		258,817
Gross sources of funds	10,108,185		14,787,657
Projected net cash flow	5,706,255		$	3,231,272
Less: Secondary uses of funds
Deposit runoff	425,080
Drawdown of standby letters of credit and lines of credit	651,892
Rollover of all maturing advances	2,325,865
Projected funding of MPF master commitments	185,731
Total secondary uses of funds	3,588,568
Structural liquidity	$	2,117,687

Contingency Liquidity. FHFA regulations require that we hold contingency liquidity in an amount sufficient to enable us to cover our operational requirements for a minimum of five business days without access to the CO debt markets. The FHFA defines contingency liquidity as projected sources of funds less uses of funds, excluding reliance on access to the CO debt markets and including funding a portion of outstanding standby letters of credit. For this purpose, outstanding standby letters of credit are assumed to be drawn down at a rate of 50 percent spread equally over 86 days following the measurement date. As defined by FHFA regulations, additional contingent sources of liquidity include the following:

• marketable securities with a maturity greater than one week and less than one year that can be sold;

• self-liquidating assets with a maturity of seven days or less;

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• assets that are generally accepted as collateral in the repurchase agreement market, for which we include 50 percent of unencumbered marketable securities with a maturity greater than one year; and

• irrevocable lines of credit from financial institutions rated not lower than the second highest rating category by an NRSRO.

We complied with this regulatory requirement at all times during the three months ended ended March 31, 2017. As of March 31, 2017 and December 31, 2016, we held a surplus of $10.7 billion and $13.4 billion, respectively, of contingency liquidity for the following five business days, exclusive of access to the proceeds of CO debt issuance.

The following table presents our contingency liquidity as of March 31, 2017.

Contingency Liquidity As of March 31, 2017 (dollars in thousands)
	5 Business Days
Cumulative uses of funds
Interest payable	$	7,880
Maturing liabilities	4,081,000
Committed asset settlements	15,000
Drawdown of standby letters of credit	135,097
Other	3,064
Gross uses of funds	4,242,041
Cumulative sources of funds
Interest receivable	37,412
Maturing or amortizing advances	2,325,865
Committed liability settlements	70,820
Gross sources of funds	2,434,097
Plus: sources of contingency liquidity
Marketable securities	1,060,176
Self-liquidating assets	7,399,000
Cash and due from banks	258,817
Marketable securities available for repo	3,773,371
Total sources of contingency liquidity	12,491,364
Net contingency liquidity	$	10,683,420

Additional Liquidity Requirements. In addition, certain FHFA guidance requires us to maintain sufficient liquidity through short-term investments in an amount at least equal to our anticipated cash outflows under two different scenarios. One scenario assumes that we cannot borrow funds from the capital markets for a period of 15 business days and that during that time we do not renew any maturing, prepaid, and put or called advances. The second scenario assumes that we cannot raise funds in the capital markets for five business days and that during that period we will renew maturing and called advances for all members except very large, highly rated members. We were in compliance with these liquidity requirements at all times during the three months endedMarch 31, 2017.

We are focused on maintaining a liquidity and funding balance between our financial assets and financial liabilities. The FHLBanks work collectively to manage the System-wide liquidity and funding management and the FHLBanks jointly monitor the System’s collective risk arising out of an inability to fully access the capital markets to fund our obligations. In managing and monitoring the amounts of assets that require refunding, we consider contractual maturities of our financial assets, as well as certain assumptions regarding expected cash flows (i.e. estimated prepayments and scheduled amortizations) and other factors in our discretion.

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Balance Sheet Funding Gap Policy. We are sensitive to maintaining an appropriate funding balance between financial assets and financial liabilities and maintain a policy that limits the potential gap between the amount of financial assets and liabilities expected to mature within a one-year time horizon inclusive of projected prepayment and call activity. In addition, this funding gap calculation includes the balance of prepayable advances maturing beyond one year that have a floating rate coupon indexed to periodic discount note auction yields. This balance is included in the funding gap calculation to reflect the matched rate-reset investment of proceeds from discount note issuance. The established policy limits this imbalance to a gap of 20 percent of total assets and sets a management action trigger at a gap of 10 percent of total assets.

At all times during the three months endedMarch 31, 2017, we maintained compliance with these policy limits and did not exceed the management action triggers. During the three months endedMarch 31, 2017, this gap averaged 0.27 percent (the maximum level at any month-end during the quarter was 1.3 percent and the minimum level at any month-end during the quarter was -0.8 percent). As of March 31, 2017, this gap was 1.3 percent, compared with 0.1 percent at December 31, 2016.

During the first quarter of 2017, we also began to measure the funding gap on a three month basis (including advances with a floating rate coupon that is indexed to periodic CO discount note auction yields). This three month gap metric also has the same 20 and 10 percent limit and management action trigger, respectively, as the one-year gap described above. 

Additionally, during the first quarter of 2017 we also began measuring our funding gap assuming repayment of our prepayable floating rate advances at their final maturity, although these advances have floating rate coupons indexed to periodic discount note auction yields. These funding gaps are measured at both the three-month and one-year timeframes and have a management action trigger of 25 percent and a limit of 35 percent.

Funding Concentration Policy. To limit the liquidity risk potentially associated with a high volume of short-term debt refinancing, we have adopted a funding concentration policy that limits the volume of discount notes outstanding as a proportion of total assets, effective March 24, 2017. The policy establishes a management action trigger when discount notes (excluding the amount of discount notes matched to short-term advances) exceed 40 percent of total assets. In addition, we have adopted a separate management action trigger that is triggered when total discount notes exceed 50 percent of asset. Finally, discount notes are limited to 65 percent of total assets or less.

External Sources of Liquidity

Amended and Restated FHLBanks P&I Funding Contingency Plan Agreement. We have a source of emergency external liquidity through the Amended and Restated FHLBanks P&I Funding Contingency Plan Agreement as discussed in Item 7 — Management's Discussion and Analysis of Financial Condition and Results of Operations — Liquidity and Capital Resources — External Sources of Liquidity in the 2016 Annual Report. Under the terms of that agreement, in the event we do not fund our principal and interest payments under a CO by deadlines established in the agreement, the other FHLBanks will be obligated to fund any shortfall to the extent that any of the other FHLBanks has a net positive settlement balance (that is, the amount by which end-of-day proceeds received by such FHLBank from the sale of COs on that day exceeds payments by such FHLBank on COs on the same day) in its account with the Office of Finance on the day the shortfall occurs. We would then be required to repay the funding FHLBanks. We have never drawn funding under this agreement.

Debt Financing — Consolidated Obligations

At March 31, 2017, and December 31, 2016, outstanding COs for which we are primarily liable, including both CO bonds and CO discount notes, totaled $52.2 billion and $57.2 billion, respectively.

CO bonds outstanding for which we are primarily liable include issued callable bonds totaling $4.7 billion at both March 31, 2017, and December 31, 2016.

CO discount notes comprised 46.4 percent and 52.5 percent of the outstanding COs for which we are primarily liable at March 31, 2017, and December 31, 2016, respectively, but accounted for 94.9 percent and 86.5 percent of the proceeds from the issuance of such COs during the three months endedMarch 31, 2017 and 2016, respectively.

Financial Conditions for Consolidated Obligations

Overall, we have experienced relatively low CO issuance costs during the period covered by this report, reflecting continued high demand for all tenors of COs with the strongest demand for short-term COs. We have been able to issue debt in the amounts and structures required to meet our funding and risk-management needs. We note that capacity among our CO

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underwriters has been occasionally somewhat constrained as a result of the imposition of higher capital requirements on many of our underwriters. So far, this development has not impeded our ability to meet our funding needs. Throughout the first quarter of 2017, COs were issued at yields that were generally at or below equivalent-maturity LIBOR swap yields for debt maturing in less than five years, while longer-term issues bore funding costs that were typically higher than equivalent maturity LIBOR swap yields. During the period covered by this report, CO yields generally moved with U.S. dollar interest rate swaps and comparable U.S. Treasury yields. We believe that the market’s reaction to recent changes in FOMC monetary policies will be an important factor that could shape investor demand for debt, including COs, for the remainder of 2017.

Capital

Total capital at March 31, 2017, was $3.3 billion compared with $3.2 billion at year-end 2016.

The FHLBank Act and FHFA regulations specify that each FHLBank is required to satisfy certain minimum regulatory capital requirements. We were in compliance with these requirements at March 31, 2017, as discussed in Item 1 — Notes to the Financial Statements — Note 15 — Capital.

Subject to applicable law, following the expiry of the stock redemption period (which is five years for Class B stock), we redeem capital stock for any member that requests redemption of its excess stock, gives notice of intent to withdraw from membership, or becomes a nonmember due to merger, acquisition, charter termination, or involuntary termination of membership. Capital stock subject to a stock redemption period is reclassified to mandatorily redeemable capital stock in the liability section of the statement of condition. Mandatorily redeemable capital stock totaled $32.7 million at both March 31, 2017, and December 31, 2016. For additional information on the redemption of our capital stock, see Item 1 — Business — Capital Resources — Redemption of Excess Stock and Item 8 — Financial Statements and Supplementary Data —Notes to the Financial Statements — Note 1 — Summary of Significant Accounting Policies — Mandatorily Redeemable Capital Stock in the 2016 Annual Report.

The following table sets forth the amount of mandatorily redeemable capital stock by year of expiry of the redemption-notice period at March 31, 2017, and December 31, 2016 (dollars in thousands).

Expiry of Redemption-Notice Period	March 31, 2017		December 31, 2016
Past redemption date (1)	$	528	$	528
Due in one year or less	4,687		—
Due after one year through two years	128		4,687
Due after two years through three years	27,250		27,378
Due after three years through four years	54		54
Due after four years through five years	—		—
Thereafter (2)	30		40
Total	$	32,677	$	32,687

_______________________

(1) Amount represents mandatorily redeemable capital stock that has reached the end of the five-year redemption-notice period but the member-related activity remains outstanding. Accordingly, these shares of stock will not be redeemed until the activity is no longer outstanding.

(2) Amount represents reclassifications to mandatorily redeemable capital stock resulting from an FHFA rule effective February 19, 2016, that makes captive insurance companies ineligible for membership. Captive insurance company members that were admitted as members prior to September 12, 2014, will have their memberships terminated no later than February 19, 2021. Captive insurance company members that were admitted as members on or after September 12, 2014, had their memberships terminated prior to February 19, 2017.

We have the authority, but are not obliged, to repurchase excess stock, as discussed under Item 1 — Business — Capital Resources — Repurchase of Excess Stock in the 2016 Annual Report and as further discussed below under Liquidity and Capital Resources — Internal Capital Practices and Policies — Repurchase of Excess Stock. At March 31, 2017, and December 31, 2016, excess capital stock totaled $257.2 million and $78.3 million, respectively, as set forth in the following table (dollars in thousands):

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	Membership Stock Investment Requirement		Activity-Based Stock Investment Requirement		Total Stock Investment Requirement (1)		Outstanding Class B Capital Stock (2)		Excess Class B Capital Stock
March 31, 2017	$	694,564	$	1,539,601	$	2,234,185	$	2,491,344	$	257,159
December 31, 2016	670,301		1,695,397		2,365,720		2,443,993		78,273

_______________________

(1) Total stock Investment Requirement is rounded up to the nearest $100 on an individual member basis.

(2) Class B capital stock outstanding includes mandatorily redeemable capital stock.

Capital Rule

The FHFA's regulation on FHLBank capital classification and critical capital levels (the Capital Rule), among other things, establishes criteria for four capital classifications and corrective action requirements for FHLBanks that are classified in any classification other than adequately capitalized. The Capital Rule requires the Director of the FHFA to determine on no less than a quarterly basis the capital classification of each FHLBank. By letter dated March 15, 2017, the Director of the FHFA notified us that, based on December 31, 2016 financial information, we met the definition of adequately capitalized under the Capital Rule.

For additional information on the Capital Rule, see Item 7 — Management's Discussion and Analysis of Financial Condition and Results of Operations — Liquidity and Capital Resources — Capital — Capital Rule in the 2016 Annual Report.

Internal Capital Practices and Policies

We also take steps as we believe prudent beyond legal or regulatory requirements in an effort to protect our capital, reflected in our targeted capital ratio operating range, internal minimum capital requirement in excess of regulatory requirements, minimum retained earnings target, and limitations on dividends.

Targeted Capital Ratio Operating Range

We target an operating capital ratio range as required by FHFA regulations. Currently, this range is set at 4.0 percent to 7.5 percent. Our capital ratio was 6.6 percent at March 31, 2017.

Internal Minimum Capital Requirement in Excess of Regulatory Requirements

To provide further protection for our capital base, we maintain an internal minimum capital requirement whereby the amount of paid-in capital stock and retained earnings (together, our actual regulatory capital) must exceed four percent of our total assets plus an amount we measure as our risk exposure with 99 percent confidence using our economic capital model (together, our internal minimum capital requirement). As of March 31, 2017, this internal minimum capital requirement equaled $2.8 billion, which was satisfied by our actual regulatory capital of $3.7 billion.

Reduction of Activity-Based Stock Investment Requirement

On April 18, 2017, we announced that we would reduce the ABSIR for advances with original maturities of more than three months from 4.5 percent to 4.0 percent. On May 1, 2017, we provided written notice to shareholders of the effective date of this change, which is the close of business on May 31, 2017. We are reducing our ABSIR to gain efficiency in our capital structure, as we currently exceed internal and regulatory minimum capital requirements.

If the pending reduction in our ABSIR had been in effect as of March 31, 2017, the amount of excess stock would have increased by approximately $128 million. Any such increase in the amount of excess stock that results from the change in ABSIR on May 31, 2017, will be subject to the daily repurchase of excess stock on June 1, 2017.

Repurchases of Excess Stock

We used the Excess Stock Management Program in the quarter ending March 31, 2017, to unilaterally repurchase $134.6 million of excess stock from shareholders on a pro rata basis. In addition, on April 3, 2017, we conducted a partial repurchase of excess capital stock under the Excess Stock Management Program in the amount of $180.2 million. These excess stock repurchase transactions were initiated in response to the decline in advances that we experienced during the quarter ending March 31, 2017.

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On May 1, 2017, we provided a notice to our shareholders that we would replace our existing system of making periodic repurchases of excess capital stock when aggregate excess stock balances exceeded $200 million. We announced that on June 1, 2017, we would begin daily repurchases of excess stock held by any shareholder whose excess stock exceeds the lesser of $10.0 million or 25 percent of the shareholder's total stock investment requirement, subject to a minimum repurchase of $100,000.

Off-Balance-Sheet Arrangements and Aggregate Contractual Obligations

Our significant off-balance-sheet arrangements consist of the following:

• commitments that obligate us for additional advances;

 • standby letters of credit;

 • commitments for unused lines-of-credit advances; and

 • unsettled COs.

Off-balance-sheet arrangements are more fully discussed in Item 8 — Financial Statements and Supplementary Data — Notes to the Financial Statements — Note 19 — Commitments and Contingencies in the 2016 Annual Report.

CRITICAL ACCOUNTING ESTIMATES

The preparation of financial statements in accordance with GAAP requires management to make a number of judgments, estimates, and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities (if applicable), and the reported amounts of income and expenses during the reported periods. Although management believes these judgments, estimates, and assumptions to be reasonably accurate, actual results may differ.

We have identified five accounting estimates that we believe are critical because they require us to make subjective or complex judgments about matters that are inherently uncertain, and because of the likelihood that materially different amounts would be reported under different conditions or using different assumptions. These estimates include accounting for derivatives, the use of fair-value estimates, accounting for deferred premiums and discounts on prepayable assets, the allowance for loan losses, and other-than-temporary-impairment of investment securities. The Audit Committee of our board of directors has reviewed these estimates. The assumptions involved in applying these policies are discussed in Item 7 — Management's Discussion and Analysis of Financial Condition and Results of Operations — Critical Accounting Estimates in the 2016 Annual Report.

As of March 31, 2017, we have not made any significant changes to the estimates and assumptions used in applying our critical accounting policies and estimates from those used to prepare our audited financial statements.

RECENT ACCOUNTING DEVELOPMENTS

See Item 1 —Notes to the Financial Statements — Note 3 — Recently Issued and Adopted Accounting Guidance for a discussion of recent accounting developments impacting or that could impact us.

LEGISLATIVE AND REGULATORY DEVELOPMENTS

Recent significant regulatory actions and developments are summarized below.

FHFA Final Rule on Acquired Member Assets.On December 19, 2016, the FHFA published the final Acquired Member Assets (AMA) rule, which governs an FHLBank’s ability to purchase and hold certain types of mortgage loans from its members. The final rule, effective January 18, 2017, has, among other things:

• expanded the types of assets that qualify as AMA to include (i) mortgage loans insured or guaranteed by a department or agency of the U.S. government that exceed the conforming loan limits and (ii) certificates representing interests in whole loans under certain conditions;

• modified the credit risk-sharing requirement, allowing an FHLBank to utilize its own model to determine the credit enhancement for eligible AMA loan assets and pool loans in lieu of a nationally recognized statistical ratings organization (NRSRO) ratings model. The assets delivered must now be credit enhanced by the member to at least the FHLBank determined “AMA investment grade” level instead of to a specific NRSRO rating; and

• retained the option to allow a member to meet its credit enhancement obligation by purchasing loan-level SMI or pool-level

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insurance once an FHLBank has established standards for qualified insurers.

We do not anticipate that the final rule will have a negative effect on the volume of AMA loan assets or on our costs of operation. After the effectiveness of the AMA regulation, our methodology to set the credit enhancement amount at an “AMA investment grade” required that the risk of loss be limited to the losses equivalent to an investor in a double-A rated MBS at the time of purchase. As of March 2017, we have set our “AMA investment grade” at single-A-minus rated MBS. We expect that setting the new credit enhancement level may provide a modest increase in volume of AMA assets in 2017.

FHFA Final Rule on New Business Activities.On December 19, 2016, the FHFA issued a final rule effective January 18, 2017, that, among other things, reduces the scope of new business activities (NBAs) for which a FHLBank must seek approval from the FHFA. Under the final rule, acceptance of new types of legally permissible collateral by the FHLBanks will not constitute a new business activity or require approval from the FHFA prior to acceptance. Instead, the FHFA will review new collateral types as part of the annual exam process. In addition, the final rule establishes certain timelines for FHFA review and approval of NBA notices. The final rule also clarifies the protocol for FHFA review of NBAs.

We do not anticipate that the final rule will materially affect the Bank.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Sources and Types of Market and Interest-Rate Risk

Our balance sheet is comprised of different portfolios that require different types of market- and interest-rate-risk management strategies. Sources and types of market and interest-rate risk are described in Item 7A — Quantitative and Qualitative Disclosures About Market Risk — Sources and Types of Market and Interest-Rate Risk in the 2016 Annual Report.

Strategies to Manage Market and Interest-Rate Risk

General

We use various strategies and techniques in an effort to manage our market and interest-rate risk including the following and combinations of the following:

• the issuance of COs that can be used to match interest-rate-risk exposures of our assets (at March 31, 2017, fixed-rate noncallable debt, not hedged by interest-rate swaps, amounted to $13.9 billion, compared with $13.5 billion at December 31, 2016);

• the use of derivatives and/or COs with embedded call options to hedge the interest-rate risk of our debt (at March 31, 2017, fixed-rate callable debt not hedged by interest-rate swaps amounted to $832.0 million compared with $667.0 million at December 31, 2016);

• the issuance of CO bonds together with interest-rate swaps that receive a coupon that offsets the bond coupon and any optionality embedded in the bond, thereby effectively creating a floating-rate liability (total CO bond debt used in conjunction with interest-rate-exchange agreements was $7.2 billion, or 25.8 percent of our total outstanding CO bonds at March 31, 2017, compared with $7.6 billion, or 28.1 percent of total outstanding CO bonds, at December 31, 2016);

• contractual provisions for certain advances that require borrowers to pay us prepayment fees, to make us financially indifferent if the borrower prepays such advances prior to maturity; and

• the use of callable debt for a portion of our investments in mortgage loans to manage the interest-rate and prepayment risks from these investments.

Each of the foregoing strategies and techniques is more fully discussed under Item 7A — Quantitative and Qualitative Disclosures About Market Risk — Strategies to Manage Market and Interest-Rate Risk in the 2016 Annual Report.

Measurement of Market and Interest-Rate Risk and Related Policy Constraints

We measure our exposure to market and interest-rate risk using several techniques applied to the balance sheet and to certain portfolios within the balance sheet. Principal among these measurements as applied to the balance sheet is the potential future change in market value of equity (MVE) and interest income due to potential changes in interest rates, interest-rate volatility, spreads, and market prices. We also measure Value at Risk (VaR), duration of equity, convexity, and the other metrics discussed below.

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MVE is the net economic value of total assets and liabilities, including any off-balance-sheet items. In contrast to the GAAP-based shareholder's equity account, MVE represents the shareholder's equity account in present-value terms. Specifically, MVE equals the difference between the estimated market value of our assets and the estimated market value of our liabilities.

MVE, and in particular, the ratio of MVE to the book value of equity (BVE), is a measure of the current value of shareholder investment based on market rates, spreads, prices, and volatility at the reporting date. However, these valuations may not be fully representative of future realized prices. Valuations are based on market curves and prices of individual assets, liabilities, and derivatives, and therefore embed elements of option, credit, and liquidity risk which may not be representative of future net income to be earned from the spread between asset yields and funding costs. Further, MVE does not consider future new business activities, or income or expense derived from sources other than financial assets or liabilities.

We measure our exposure to market and interest-rate risk using several metrics, including:

• the ratio of MVE to BVE;

• the ratio of MVE to the par value of our Class B Stock (Par Stock), which we refer to as the MVE to Par Stock ratio;

• the ratio of MVE to the market value of assets, which we refer to as the economic capital ratio;

• VaR, which measures the change in our MVE to a 99th percent confidence interval, based on a set of stress scenarios (VaR Stress Scenarios) using historical interest-rate and volatility movements that have been observed over six-month intervals starting at the most recent month-end and going back monthly to 1992;

• duration of equity, which measures the estimated percentage change to market value for a 100 basis point shift in rates;

• MVE sensitivity, which is the estimated percent change in MVE in various shocked interest rate scenarios vs. base case MVE;

• the duration gap of our assets and liabilities, which is the difference between the estimated durations (percentage change in market value for a 100 basis point shift in rates) of assets and liabilities (including the effect of related hedges) and reflects the extent to which estimated sensitivities to market changes, including, but not limited to, maturity and repricing cash flows for assets and liabilities are matched;

• targeted metrics for our investments in mortgage loans; and

• the use of an income-simulation model that projects net interest income over a range of potential interest-rate scenarios, including parallel interest-rate shocks, nonparallel interest-rate shocks, and nonlinear changes to our funding curve and LIBOR.

We maintain limits and management action triggers in connection with each of the foregoing metrics. Those limits, management action triggers, and the foregoing market and interest-rate risk metrics are more fully discussed under Item 7A — Quantitative and Qualitative Disclosures About Market Risk — Measurement of Market and Interest-Rate Risk and Related Policy Constraints in the 2016 Annual Report.

The following table sets forth each of the foregoing metrics together with any targets, associated limits and management actions triggers at March 31, 2017, and December 31, 2016.

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Interest/Market-Rate Risk Metric	March 31, 2017	December 31, 2016	Target, Limit or Management Action Trigger at December 31, 2016
MVE	$3.7 billion	$3.6 billion	None
MVE/BVE	99%	98%	None
MVE/Par Stock	148%	148%	102% (management action trigger) and 100% or higher (limit)
Economic Capital Ratio	6.5%	5.8%	Maintain above 4.5% (management action trigger) and 4.0% (limit)
VaR	$168.6 million	$118.8 million	Maintain below $225.0 million (management action trigger) and $275.0 million (limit)
Duration of Equity	+1.22 years	+1.67 years	Maintain between +/- 3.5 years (management action trigger) and +/- 4.0 years (limit)
MVE Sensitivity in a +/- 200 basis point parallel rate shock	(5.6)%	(6.3)%	Maintain above -10% (management action trigger) and -15% (limit)
Duration Gap	+0.94 months	+1.17 months	None
MPF Portfolio VaR	$78.4 million	$76.9 million	Maintain below 25% of the VaR limit (management action trigger)
Income Simulation based on an instantaneous rise in interest rates of 300 basis points	Return on regulatory capital is 136 basis points above the average yield on three-month LIBOR	Return on regulatory capital is 207 basis points above the average yield on three-month LIBOR	Maintain projected return on regulatory capital above three-month LIBOR over the following 12 month horizon (management action trigger)

MPF Portfolio Management Action Trigger of 25 Percent of Our VaR Limit. We have established a management action trigger for VaR exposure from our investments in mortgage loans through the MPF program such that the VaR from these investments shall not exceed 25 percent of our overall VaR limit. While we seek to limit interest-rate risk through matching asset maturity and optionality with its corresponding funding, mortgage loans cannot be perfectly match funded due to factors including, but not limited to, borrower prepayment behavior and basis risk between the swap and our funding curves. This management action trigger was $68.8 million at March 31, 2017 and December 31, 2016, based on our overall VaR limit of $275.0 million. Our actual MPF portfolio VaR exposure at March 31, 2017, was $78.4 million, compared with $76.9 million as of December 31, 2016 .

We exceeded the MPF Portfolio VaR management action trigger at both December 31, 2016 and March 31, 2017. This was largely the result of the recent increase in interest rates and projected extension of the MPF portfolio beyond that experienced by the CO debt used to fund this portfolio. Management reviewed the risk exposure in the MPF portfolio and the risk exposure of the entire balance sheet as required by the trigger. The risk of the overall balance sheet as measured by VaR remained well below both its management action trigger and limit, and management decided that no reduction to the MPF risk profile was required. Should we continue to exceed our MPF VaR management action trigger, and should our VaR increase closer to its trigger and limit, we expect that management could reduce our risk exposure by making changes to the balance sheet including but not limited to altering the debt profile, which could have an adverse impact on income.

Value at Risk. The table below presents the historical simulation VaR estimate as of March 31, 2017, and December 31, 2016, and represents the estimates of potential reduction to our MVE from potential future changes in interest rates and other market factors. Estimated potential market value loss exposures are expressed as a percentage of the current MVE and are based on the historical relative behavior of interest rates and other market factors over a 120-business-day time horizon.

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	Value-at-Risk (Gain) Loss Exposure (1)
	March 31, 2017				December 31, 2016
Confidence Level	% of MVE (2)		$ million		% of MVE (2)		$ million
50%	0.07	%	$	2.6	(0.01	)%	$	(0.4	)
75%	0.52		19.3		0.51		18.5
95%	2.34		86.6		1.87		67.4
99%	4.56		168.6		3.29		118.8

_______________________

(1) To be consistent with FHFA guidance, we have excluded VaR stress scenarios prior to 1992 because market-risk stress conditions are effectively captured in those scenarios beginning in 1992 and therefore properly present our current VaR exposure.

(2) Loss exposure is expressed as a percentage of base MVE.

Certain Market and Interest-Rate Risk Metrics under Potential Interest-Rate Scenarios

We also monitor the sensitivities of MVE and the duration of equity to potential interest-rate scenarios. The following table presents certain market and interest-rate risk metrics under different interest-rate scenarios (dollars in millions).

	March 31, 2017
	Down 300(1)	Down 200(1)	Down 100(1)	Base	Up 100	Up 200	Up 300
MVE	$3,466	$3,564	$3,682	$3,694	$3,607	$3,486	$3,351
Percent change in MVE from base	(6.2)%	(3.5)%	(0.3)%	—%	(2.4)%	(5.6)%	(9.3)%
MVE/BVE	93.1%	95.8%	98.9%	99.2%	96.9%	93.7%	90.0%
MVE/Par Stock	139%	143%	148%	148%	145%	140%	134%
Duration of Equity	-1.50 years	-3.03 years	-1.47 years	+1.22 years	+3.05 years	+3.67 years	+4.19 years
Return on Regulatory Capital less 3-month LIBOR (2)	2.3%	2.5%	2.8%	2.8%	2.3%	1.9%	1.4%
Net income percent change from base	(46.0)%	(41.3)%	(22.5)%	—%	13.8%	26.4%	38.2%

____________________________

(1) In an environment of low interest rates, downward rate shocks are floored as they approach zero, and therefore may not be fully representative of the indicated rate shock.

(2) The income simulation metric for March 31, 2017, is based on projections of adjusted net income over a range of potential interest-rate scenarios over the following 12-month horizon divided by regulatory capital. Regulatory capital is capital stock (including mandatorily redeemable capital stock) plus total retained earnings, and projections of adjusted net income exclude a) interest expense on mandatorily redeemable capital stock; b) projected prepayment penalties; c) loss on early extinguishment of debt; and d) changes in fair values from trading securities and hedging activities.

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	December 31, 2016
	Down 300(1)	Down 200(1)	Down 100(1)	Base	Up 100	Up 200	Up 300
MVE(2)	$3,385	$3,485	$3,618	$3,606	$3,506	$3,379	$3,240
Percent change in MVE from base	(6.1)%	(3.3)%	0.3%	—%	(2.8)%	(6.3)%	(10.1)%
MVE/BVE	92.5%	95.2%	98.8%	98.5%	95.8%	92.3%	88.5%
MVE/Par Stock	138%	143%	148%	148%	143%	138%	133%
Duration of Equity	-1.64 years	-3.35 years	-1.11 years	+1.67 years	+3.39 years	+3.93 years	+4.42 years
Return on Regulatory Capital less 3-month LIBOR (2)	2.4%	2.6%	2.9%	2.9%	2.6%	2.4%	2.1%
Net income percent change from base	(41.6)%	(37.3)%	(22.7)%	—%	18.2%	37.1%	55.2%

____________________________

(1) In an environment of low interest rates, downward rate shocks are floored as they approach zero, and therefore may not be fully representative of the indicated rate shock.

(2) The income simulation metric for December 31, 2016, is based on projections of adjusted net income over a range of potential interest-rate scenarios over the following 12-month horizon divided by regulatory capital. Regulatory capital is capital stock (including mandatorily redeemable capital stock) plus total retained earnings, and projections of adjusted net income exclude a) interest expense on mandatorily redeemable capital stock; b) projected prepayment penalties; c) loss on early extinguishment of debt; and d) changes in fair values from trading securities and hedging activities.

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ITEM 4. CONTROLS AND PROCEDURES

Disclosure Controls and Procedures

Our senior management is responsible for establishing and maintaining a system of disclosure controls and procedures designed to ensure that information required to be disclosed by us in the reports filed or submitted under the Securities Exchange Act of 1934 is recorded, processed, summarized, and reported within the time periods specified in the rules and forms of the SEC. Our disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by us in the reports that we file or submit under the Securities Exchange Act of 1934 is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure. In designing and evaluating our disclosure controls and procedures, we recognize that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and our management necessarily is required to apply its judgment in evaluating the cost-benefit relationship of controls and procedures.

We have evaluated the effectiveness of the design and operation of our disclosure controls and procedures, with the participation of the president and chief executive officer and chief financial officer, as of the end of the period covered by this report. Based on that evaluation, our president and chief executive officer and chief financial officer have concluded that our disclosure controls and procedures were effective at a reasonable assurance level as of the end of the fiscal quarter covered by this report.

Changes in Internal Control over Financial Reporting

During the quarter ended March 31, 2017, there were no changes in our internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

We describe our private-label MBS litigation in Item 3 — Legal Proceedings in the 2016 Annual Report.

From time to time, we are subject to various pending legal proceedings arising in the normal course of business. After consultation with legal counsel, we do not anticipate that the ultimate liability, if any, arising out of these matters will have a material adverse effect on our financial condition or results of operations.

ITEM 1A. RISK FACTORS

In addition to the information presented in this report, readers should carefully consider the risk factors set forth in the 2016 Annual Report, which could materially impact our business, financial condition, or future results. These risks are not the only risks facing us. Additional risks and uncertainties not currently known to us or that we currently deem immaterial may also materially impact us.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

Not applicable.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

None

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5. OTHER INFORMATION

None

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ITEM 6. EXHIBITS

Number	Exhibit Description
10.1	The Federal Home Loan Bank of Boston 2017 Executive Incentive Plan*^
31.1	Certification of the president and chief executive officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification of the chief financial officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1	Certification of the president and chief executive officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2	Certification of the chief financial officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document

*Management contract or compensatory plan.

^ Confidential treatment has been requested as to portions of this exhibit.

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date	FEDERAL HOME LOAN BANK OF BOSTON (Registrant)
May 11, 2017	By:	/s/	Edward A. Hjerpe III
			Edward A. Hjerpe III President and Chief Executive Officer
May 11, 2017	By:	/s/	Frank Nitkiewicz
			Frank Nitkiewicz Executive Vice President and Chief Financial Officer

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EX-10.1

Note: Redacted portions have been marked with [^^^]. The redacted portions are subject to a request for confidential treatment that has been filed with the Securities and Exchange Commission.

FEDERAL HOME LOAN BANK OF BOSTON

2017 EXECUTIVE INCENTIVE PLAN

Purpose:

The Federal Home Loan Bank of Boston (Bank) has established an Executive Incentive Plan (EIP) to:

• promote achievement of the Bank’s financial plan and strategic objectives as spelled out in the 2017 Strategic Business Plan;

• provide a total rewards package that is competitive with other financial institutions in the employment markets in which the Bank competes, including other Federal Home Loan Banks; and

• facilitate the retention and commitment of corporate officers or a select group of management or highly compensated employees

Guiding Principles:

The 2017 EIP is intended to:

• Reflect a reasonable assessment of the Bank’s financial situation and prospects while rewarding achievement of the Bank’s financial plan and strategic objectives as spelled out in the Bank’s 2017 Strategic Business Plan.

• Reinforce and reward the Bank’s commitment to conservative, prudent, sound risk management practices and preservation of the par value of the Bank’s capital stock.

• Tie a significant percentage of incentive awards to the long-term financial condition and performance of the Bank.

• Recognize the importance of individual performance through metrics linked to the Bank’s strategic goals and/or objectives of the participant’s principal functions and independent of the areas that they monitor.

Incentive Goals for Participants Outside Enterprise Risk Management:

The incentive goals for all participants, with the exception of those participants in Enterprise Risk Management, are summarized in the following table with more detail in Appendix A. Levels of achievement for the Pre-Assessment Core Return on Capital Stock goal have been rounded. Year-end results will be rounded for award calculations.

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Goal	Weight			Threshold	Target	Excess
	Pres.	Tier I	Tiers II & III
Pre-assessment Core Return on Capital Stock, subject to risk limits	25%	25%	25%	5.58%, as adjusted for interest rates*	6.20%, as adjusted for interest rates*	7.44%, as adjusted for interest rates*
New Business and Mission Goal	20%	20%	20%	$2 Billion in new long term advances disbursed	$3.50 Billion in new long term advances disbursed	$5 Billion in new long term advances disbursed
Insurance Advances Disbursements	15%	15%	15%	$1.25 Billion	$2.25 Billion	$3.25 Billion
Insurance Membership	10%	10%	10%	3 new members	5 new members	7 new members
Implement the Helping to House New England (HHNE) Initiative	10%	10%	10%	Establish a cross-functional team to perform an analysis of alternatives to advances as a method to deliver HHNE subsidy to the New England HFAs. Deadline is 3/31/17 for launch of 2017 HHNE**	Disburse 80% of subsidy by 12/31/17	Disburse 100% of subsidy by 12/31/17
Implement the Jobs for New England (JNE) Initiative	10%	10%	10%	Launch the 2017 JNE in January and disburse 50% of the subsidy by 6/30/17	Disburse 70% of the subsidy by 6/30/17 with three new member users***	Disburse 100% of the subsidy by 10/31/17 with 10 new member users of JNE
Individual, Bank-wide or Department-Specific Initiatives	10%	10%	10%	As documented by manager	As documented by manager	As documented by manager

* Each of the performance levels will be adjusted up/(down) by 1.0 basis point for every basis point by which the average daily federal funds rate is greater than/(less than) the 0.83% rate assumed in the 2017 Rebaseline Forecast.

** See the appendix for further details if FHFA approval or non-objection is needed.

*** See the appendix for new user definition.

Incentive Goals for Participants from Enterprise Risk Management:

Incentive goals for Enterprise Risk Management participants in Tiers I, II and III are summarized in the following table with more detail in Appendix A. Year-end results will be rounded for award calculations.

2

Goal	Weight		Threshold	Target	Excess
	Tier I	Tiers II & III
Bank wide ERM initiatives	35%	30%	As documented in Appendix A	As documented in Appendix A	As documented in Appendix A
Remediation of 2016 Report of Examination Matters Requiring Attention and recommendations	15%	10%	Clear all MRA’s and [^^^] of [^^^] recommendations	Clear all MRA’s and recommendations	Target plus receive an upgrade in at least [^^^]
Pre assessment Core Return on Capital Stock, subject to risk limits	20%	15%	5.58%, as adjusted for interest rates*	6.20%, as adjusted for interest rates*	7.44%, as adjusted for interest rates*
Implement the Helping to House New England (HHNE) Initiative	10%	10%	Establish a cross-functional team to perform an analysis of alternatives to advances as a method to deliver HHNE subsidy to the New England HFAs. Deadline is 3/31/17 for launch of 2017 HHNE**	Disburse 80% of subsidy by 12/31/17	Disburse 100% of subsidy by 12/31/17
Implement the Jobs for New England (JNE) Initiative	10%	10%	Launch the 2017 JNE in January and disburse 50% of the subsidy by 6/30/17	Disburse 70% of the subsidy by 6/30/17 with three new member users***	Disburse 100% of the subsidy by 10/31/17 with 10 new member users of JNE
Individual, Bank-wide or Department Specific Initiatives	10%	25%	As documented by manager	As documented by manager	As documented by manager

* Each of the performance levels will be adjusted up/(down) by 1.0 basis point for every basis point by which the average daily federal funds rate is greater than/(less than) the 0.83% rate assumed in the 2017 Rebaseline Forecast.

** See the appendix for further details if FHFA approval or non-objection is needed.

*** See the appendix for new user definition.

Incentive Opportunity:

Eligible participants will be assigned an incentive award opportunity that combines short and long-term incentives and is expressed as a percentage of the incumbent’s 2017 base salary at year-end, as illustrated in the chart below.

	Combined Short and Long-Term Incentive Opportunity as a Percent of Base Salary1
	Threshold	Target	Excess
President	50.00%	75.00%	100.00%
Tier I	30.00%	50.00%	70.00%
Tier II	17.50%	35.00%	52.50%
Tier III	12.50%	25.00%	37.50%

Goal achievement and individual awards for the goals on pages two and three will be calculated at the conclusion of 2017 based on results as of December 31, 2017. Participants in the President and Tier I will be eligible to receive fifty (50) percent of such award in a cash payment, participants in Tier II will be eligible to receive sixty (60) percent of such award in a cash payment, subject to the final approval of the

___________________________________________

¹  The combined short and long term incentive paid under the EIP will not exceed 100% of the weighted average of the base salary of the participant for 2017, 2018 and 2019.

board and the review of the Federal Housing Finance Agency (FHFA), if required, between March 1 and March 15, 2018. Except as otherwise described under EIP Administration, the participant must be

3

employed by the Bank on the date of payment of the award to receive the award. The chart below illustrates the Threshold, Target and Excess payout potentials for this short-term award, by tier.

2017 Short-Term Incentive Opportunity
Tier	Threshold	Target	Excess
President	25.00%	37.50%	50.00%
Tier I	15.00%	25.00%	35.00%
Tier II	10.50%	21.00%	31.50%
Tier III*	12.50%	25.00%	37.50%

*100% of payout opportunity to be paid following year-end 2017; no long-term opportunity

Long-Term Goals:

Goal achievement and individual awards for the long-term opportunity will be determined at the conclusion of 2019 based on results of the following two long-term goals as of December 31, 2019.

• Average Annual Pre-Assessment Core Return on Capital Stock over the period 2017-2019 as adjusted for interest rates*: ( 67% weight)

Threshold:    5.01%

Target:    6.26%

Excess:    7.51%

* Each of the performance levels will be adjusted up/(down) by 1.0 basis point for every basis point by which the average daily federal funds rate is greater than/(less than) the 1.22% rate assumed in the 2017-2019 Rebaseline Forecast.

See definitions in Appendix A under Pre-assessment Core Return on Capital Stock

• Regulatory Results: (33% weight)

This goal will be measured by the achievement of targeted regulatory goals by December 31, 2019.

Participants will be eligible to receive the long-term award opportunity as cash between March 1 and March 15, 2020, as follows:

Long-Term Incentive Opportunity Payable after Year-End 2019:

Threshold: An award equal to 50 percent of the remaining 50 percent for President and Tier I and 40 percent for Tier II of the combined award opportunity

Target: An award equal to 100 percent of the remaining 50 percent for President and Tier I and 40 percent for Tier II of the combined award opportunity

Excess: An award equal to 150 percent of the remaining 50 percent for President and Tier I and 40 percent for Tier II of the combined award opportunity

In addition, the following conditions must be satisfied for participants to receive the long-term award opportunity:

• The participant is in employment with the Bank on the payment date, as described below in EIP Administration, and

• Subject to the discretion of the board, the long-term award calculated above may be reduced, (but not to a number that is less than zero) for all participants or for an individual participant, as applicable, if, during calendar years 2018 and/or 2019, any of the following occur such that if it had occurred prior to the year-end 2017 calculations, it would have negatively impacted the goal results and reduced the associated payoutcalculation:

4

i. operational errors or omissions resultingin material revisions to (A) the 2017 financial results, (B) information submitted to FHFA supporting the goal results or payout calculation, or (C) other data used to determine the combined award at year-end 2017;

ii. submission of significant information to the SEC, Office of Finance and/or FHFA materially beyond any deadline or applicable grace period, other than late submissions that are caused by acts of God or other events beyond the reasonable control of the participants, or

iii. failure by the bank to make sufficient progress, as determined by the FHFA, in the timely remediation of examination and other supervisory findings relevant to the goal results or payout calculation.

• All long-term award payouts shall be subjectto the final approval of the board and review and non-objection by the FHFA (to the extent required by FHFA).

Eligible Participants:

The Executive Incentive Plan is intended to be an integral component of the Bank’s Total Reward Philosophy. All Corporate Officers are eligible to participate in the 2017 Executive Incentive Plan, at participation tier levels, and subject to any limitations on participation, as may be set by the Human Resources and Compensation Committee herein and/or by separate action.

Other members of management or highly compensated employees (i.e. non-Corporate Officers) may also be selected for participation in the 2017 Executive Incentive Plan: (i) by the Committee, for participation in Tiers I and II or (ii) by the President and CEO, for participation in Tier III. Any such participation shall be subject to any limitations as may be set by the Human Resources and Compensation Committee herein and/or by separate action.

EIP Administration:

The EIP is administered by the Human Resources and Compensation Committee of the Board of Directors (Committee), which shall have full power and binding authority to construe, interpret, and administer the EIP, and to adjust it for extraordinary circumstances. Extraordinary circumstances may include changes in business strategy, termination or commencement of business lines, impact of severe economic fluctuations, significant growth or consolidation of the membership base, or significant regulatory or other changes impacting the Bank or Bank System. The Committee shall not make adjustments for extraordinary circumstances that include changes to goals, weights, or levels of achievement without re-submission to FHFA.

The Committee reserves the right at any time to amend, suspend or terminate the EIP in whole or in part, for any reason, and without the consent of any EIP participant but will not do so without re-submission to FHFA.

The Bank’s President and Chief Executive Officer will determine participation in the EIP with the concurrence of the Committee.

EIP awards shall not be considered earned or payable, in whole or in part, to any participant for any reason until they are finally determined by the Bank’s President and Chief Executive Officer with the concurrence of the Committee following the end of the plan years and following the non-objection of the FHFA (to the extent required by the FHFA).

Participants must receive a performance rating of “Meets Expectations” or better for 2017 in order to be eligible to receive an EIP payout.

5

Any individual hired into an eligible position during 2017 that is granted an award shall have any such incentive award prorated based on actual base salary paid during the plan year providing he/she has served a minimum of three months in that role in 2017 and otherwise satisfies the EIP’s requirements.

If an individual becomes a participant of the EIP during the plan year, e.g. due to a job change or promotion, then any EIP award will be prorated based on months in the EIP, provided he/she serves a minimum of three months in the EIP and otherwise satisfies the plan's requirements.

Except as described below, any EIP participant who terminates employment for any reason, whether voluntarily or involuntarily, before the applicable award payment date will not be entitled to any award, except as otherwise determined by the Bank’s President and Chief Executive Officer, with the concurrence of the Committee, at their sole discretion and subject to review of the FHFA, if required^2. 

• EIP participants who terminate employment with the Bank by reason of death or disability or who are eligible to retire³ from employment with the Bank prior to the March 2018 short-term award payment date may receive a pro rata payment of the short-term incentive opportunity as determined and recommended by the Bank’s President and Chief Executive Officer, with the concurrence of the Committee and at their sole discretion and subject to the review of the FHFA, if required, based on the months of completed service as an EIP participant during 2017. To be eligible, the participant must complete at least six months of service in 2017 and otherwise satisfy the EIP’s requirements. Participants who die, become disabled, or retire during 2017 will not be eligible for any long-term incentive award.

• EIP participants who terminate employment with the Bank by reason of death or disability prior to the long-term award payment date in March 2020, or who terminate prior to the long-term award payment date and are eligible to retire³ from employment with the Bank, may become eligible to receive a payment of the long-term incentive opportunity, subject to the granting of awards based on 2019 year-end results described above, the recommendation of the Bank’s President and Chief Executive Officer, with the concurrence of the Committee and at their sole discretion, and subject to review of the FHFA, if required.

Awards to retiring or disabled participants or beneficiaries will be paid at the same time as awards to all active participants. Beneficiary means the participant’s (i) surviving spouse; or (ii) duly appointed and qualified executor or personal representative or estate. The Administrator may permit participants to designate other persons as beneficiaries, but no designation of a beneficiary shall be effective unless made in accordance with the procedure specified by the Administrator and actually received by the Administrator prior to the participant’s death.

The Bank may make such provisions, as it deems appropriate, for withholding payroll taxes in connection with payment of EIP awards.

___________________________________________

²  Where the EIP refers to the participant's termination of employment for purposes of receiving any payment, whether such a termination has occurred will be determined in accordance with Section 409A of the Internal Revenue Code and applicable regulations thereunder.

³  Eligibility to retire is defined as employees who are i) eligible for normal retirement as defined in the Pentegra Defined Benefit Plan for Financial Institutions or ii) meet the Rule of 70 as defined in the Pentegra Defined Benefit Plan for Financial Institutions, including credited service in the FHLB system, but excluding any other credited service at another Pentegra participating employer.

6

Appendix A - Goal Definitions

Pre-assessment Core Return on Capital Stock:

The metric for this goal is defined below. The required performance level for Target is based on the 2017 Strategic Business Plan Base Case projection.

To account for the expected sensitivity of Pre-Assessment Core Return on Capital Stock to changes in interest rates, the required performance levels for Threshold, Target and Excess for 2017 will be adjusted upward or downward by 1.0 basis point for every basis point by which the average daily federal funds rate deviates from the 0.83% assumed in the Rebaselined 2017 forecast for the 2017 Business Plan, and for 2017-2019 will be adjusted upward or downward by 1.0 basis point for every basis point by which the average daily federal funds rate deviates from the 1.22% assumed in the Rebaselined 2017-2019 forecast in the 2017 Business Plan.

Achievement of the goal is subject to compliance with the Bank’s VaR and Duration of Equity limits for at least 10 of the 12 months of the year. If this requirement is not met, the Board may use its discretion to reduce or eliminate payouts for this goal of the EIP.

Pre-assessment, Pre-OTTI Core Return on Capital Stock =

Net Income -

Prepayment Fees + Historical Prepayment Fee Amortization

+Debt Retirement Costs - Historical Debt Retirement Cost Amortization

-Net Fair Value Adjustments + OTTI Credit Losses

-Accretion of Prior OTTI Credit Losses Due to Improvements in Projected PLMBS Performance

+AHP Expense +JNE/HHNE Expense - PLMBS Litigation Income

____________________________________________________________________________________

Average Daily Outstanding Balance of Capital Stock including Mandatorily Redeemable Capital Stock

Net Income = 2017 net income reported in accordance with GAAP in the United States.

Prepayment Fees = Fee income resulting from the exercise of prepayment options on financial instruments, net of hedge unwind gain/loss.

Historical Prepayment Fee Amortization = the current-period, straight-line amortization of all historical prepayment fees (whether recognized at time of prepayment or as a yield adjustment on a modified loan) over the original remaining lives of the prepaid assets.

Debt Retirement Costs = Losses incurred under GAAP when outstanding debt is purchased for retirement, net of hedge unwind gain/loss

Historical Debt Retirement Cost Amortization = the current-period, straight-line amortization of all historical debt retirement costs over the original remaining lives of the retired liabilities.

Net Fair Value Adjustments = the net unrealized gains and losses as recognized under GAAP attributable to hedges, whether economic hedges or SFAS 133-qualifying hedges, plus trading securities gains and losses.

OTTI Credit Losses = the absolute value of the full-year amount of the credit loss portion of overall losses attributable to other-than-temporary impairments of private-label mortgage-backed securities.

7

Accretion of Prior OTTI Credit Losses Due to Improvements in Projected PLMBS Performance = incremental interest income earned due to yield adjustments applied to OTTI PLMBS that are projected to have a significant improvement in credit performance over their remaining lives.

AHP Expense = the Bank’s required set aside of 10% of net income before AHP Expense as recognized for the full Plan calendar year(s).

JNE/HHNE Expense = subsidy amounts expensed through the Bank’s Jobs for New England and Helping to House New England programs.

PLMBS Litigation Income = Net income resulting from settlements or judgments stemming from the Bank’s lawsuits against certain defendants alleging fraud and misrepresentation surrounding PLMBS sold to the Bank.

In the event that the Bank is required to adjust current period net income to correct prior period accounting errors, positive adjustments to net income resulting from the correction of prior period accounting errors are to be excluded from Pre-Assessment Core Return on Capital Stock, while negative adjustments are to be retained in Pre-Assessment Core Return on Capital Stock.

The exclusion of prepayment fee income and associated debt retirement and hedge unwind gain/loss from the Pre-Assessment Core Return on Capital Stock metric removes the potential for “windfall” compensation in the event of heavy prepayment fee income and removes a potential disincentive to prudently respond to prepayment events by excluding the otherwise punitive cost of debt retirement and swap unwind expense. The exclusion of net unrealized fair value adjustments is consistent with the way that management projects its financial performance and reflects the fact that these adjustments are merely timing adjustments to net income that have no net impact to the Bank’s net income if gains or losses are never realized. OTTI Credit Losses are excluded from Pre-Assessment Core Return on Capital Stock because they cannot be controlled by management. Similarly, Accretion of Prior OTTI Credit Losses Due to Improvements in Projected PLMBS Performance and PLMBS Litigation Income are excluded as they represent recoveries of or offsets to OTTI Credit Losses, which are excluded. The Bank may make additional adjustments, subject to approval by the Board and non-objection by the FHFA, for extraordinary items such as unbudgeted voluntary pension contributions, which are expected to be made only if the Bank earns sufficient PLMBS litigation income to cover the unbudgeted portion of such contributions.

New Business and Mission Goal:

Advances with maturities of greater than or equal to one year in term (and not pre-payable without fee), including advances restructurings that result in extension of the advance in maturity of one year or longer, but excluding AHP, CDA, NEF, JNE, and HHNE, qualify toward the achievement of this goal. The goal will be measured on the basis of total originations during any point during 2017 and excludes all advances to insurance company members.

Insurance Advances Originations:

Advances originated (any type and maturity of advance) to insurance company members qualify toward the achievement of this goal. Advances originations is defined as the sum of advance amounts disbursed or originated in 2017 net of advance rollovers. Advance rollovers are defined as advances disbursed on the maturity date of another advance previously disbursed in 2017 where the new advance amount is the same as or smaller than the maturing advance. If the new advance is larger than the maturing advance, the net increase will count towards the goal. Advance rollovers include pre-funding of maturing advances where the disbursement date of the new advance and maturity date of the old advance do not line up exactly.

8

Member Services will identify pre-funding for the President's approval. If the new advance prefunding maturities is larger than the maturing advances, the net increase will count towards the goal.

Insurance Membership:

The number of insurance companies approved for membership by the President and CEO during the calendar year 2017 qualify toward the achievement of this goal. Applications from insurance companies that are affiliated and submitted within a 90 day period will count as separate memberships if eachapplicant’s net admitted assets are $250 million or greater.

Helping to House New England:

The 2017 HHNE program will require an analysis of alternatives to advances as a means to deliver the subsidy dollars. The analysis will be done and the 2017 HHNE will become available to the New England HFAs by 3/31/17. HHNE advances will continue to qualify toward the achievement of the goal as will bond purchases (when credit quality meets the Banks requirement) or other means which will be explored as part of the analysis. Any alternative delivery approach that requires FHFA approval or non objection, will result in a modification to the launch date of 3/31/17 to one month following the FHFA response.

Jobs for New England:

The 2017 JNE program will be launched in January 2017. During the year the the focus will be on both disbursing the subsidy dollars earlier in the year and introducing the program to members that did not use JNE in 2016.A new user will be defined as a member that did not apply and take down a JNE advance in 2016. A member that worked with Bank staff to identify an eligible loan to fund under JNE, but did not use the program in 2016, will count toward the new user goal.

Bank-wide ERM Initiatives:

Goal: Contribute to the Bank activities for 2017 via active participation with key constituents co-led by ERM and business unit management.

Targeted and Key Action Plans that support business unit objectives will be agreed upon by the end of the first month of each quarter by Executive leadership of ERM, Member Services, Treasury and IT/IS.

Threshold - Satisfactorily meet 75% of Targeted Action Plans

Target - Threshold and 100% of Key Action Plans

Excess - Satisfactorily meet 100% of Targeted and Key Action Plans

Goal: Evaluate and assess the impact of the FHFA’s Risk Based Capital methodologies likely to be released by early 2017 for market and credit risk and make presentations to management and the Risk Committee of the Board.

Threshold - Complete assessment within 6 months of announcement but not later than implementation date

Target - Complete assessment within 4 months of announcement but not later than implementation date

Excess - Complete assessment within 3 months of announcement but not later than implementation date

9

Goal: Increase awareness of the Bank’s risk management framework and its impact on staff by conducting bank-wide sessions throughout the year - targeted topics include the three line of defense business model with a focus on operational risk and risk exception reporting, the risks embedded in models and end-user developed applications and another topic to be developed. Success is measured by making the sessions available to all Bank staff and providing a synopsis presentation to the Risk Committee.

By 10/30/17:

Threshold - Conduct sessions on one topic

Target - Conduct sessions on two topics

Excess - Conduct sessions on three topics

Remediation of 2016 Report of Exam Findings:

The 2016 Examination by the Federal Housing Finance Agency noted [^^^] Matters Requiring Attention (MRA) and [^^^] recommendations. The target goal established for the remediation of these MRAs requires management to receive clearance of all MRAs is defined as non-reoccurrence of the MRA during the 2017 examination due to either addressing or by having in place an acceptable action plan to address the MRA and clearance all recommendations. The threshold goal is the successful remediation of the MRAs and clearance of [^^^] of the recommendations. The excess level of achievement for this goal is to achieve the target level of achievement plus an upgrade in at least [^^^] in the 2017 examination by the Federal Housing Finance Agency.

Individual, Bank-Wide or Department-Specific Initiatives

The Individual, Bank-wide or Department-Specific Initiatives Goal provides for recognition of the individual participant’s successful contributions toward achievement of Bank-wide strategic goals or completion of department-specific initiatives. For 2017, this goal will include two to four individual or shared participant goals.

Goals will be established at the beginning of the plan year. For the Bank’s Named Executive Officers (NEO’s), revisions to these goals or initiatives may be considered on a case-by-case basis during the year upon recommendation of the President and Chief Executive Officer and approval of the Human Resources and Compensation Committee. For all other plan participants, revisions to these goals or initiatives may be considered on a case-by-case basis during the year but must be approved, in writing, by the President and Chief Executive Officer.

Payments under the Individual, Bank-wide or Department-Specific Goal will be based on the individual’s combined, overall performance on the individual goals or initiatives, as evaluated by the participant’s manager. The goals or initiatives may be shared within a department or across multiple departments, but the manager’s assessment will be based on the participant’s individual contribution as well as the overall achievement of the initiative. Managers may select a payout percentage for individual, Bank-wide or department-specific objectives from a range of threshold to a maximum payout at excess to recognize the degree to which the EIP participant accomplished these results. If the individual goals supporting Bank-wide strategic goals or department-specific initiative(s) are not substantially achieved, the manager may award zero for this goal. Managers need to provide reasonable documentation as the basis for any award recommended under this goal.

10

EX-31.1

EXHIBIT 31.1

Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

for the President and Chief Executive Officer

I, Edward A. Hjerpe III, certify that:

1.I have reviewed this quarterly report on Form 10-Q of the Federal Home Loan Bank of Boston;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting;

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:	May 11, 2017	/s/ Edward A. Hjerpe III
		Edward A. Hjerpe III
		President and Chief Executive Officer

EX-31.2

EXHIBIT 31.2

Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

for the Chief Financial Officer

I, Frank Nitkiewicz, certify that:

1.I have reviewed this quarterly report on Form 10-Q of the Federal Home Loan Bank of Boston;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting;

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:	May 11, 2017	/s/ Frank Nitkiewicz
		Frank Nitkiewicz
		Executive Vice President and Chief Financial Officer

EX-32.1

EXHIBIT 32.1

Certification by the President and Chief Executive Officer

Pursuant to 18 U.S.C. Section 1350,

as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

I, Edward A. Hjerpe III, President and Chief Executive Officer of the Federal Home Loan Bank of Boston (“Registrant”) certify that, to the best of my knowledge:

1.The Registrant's Quarterly Report on Form 10-Q for the period ended March 31, 2017 (“Report”), fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

Date:	May 11, 2017	/s/ Edward A. Hjerpe III
		Edward A. Hjerpe III
		President and Chief Executive Officer

A signed original of this written statement required by Section 906 has been provided to the Federal Home Loan Bank of Boston and will be retained by the Federal Home Loan Bank of Boston and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

EXHIBIT 32.2

Certification by the Chief Financial Officer

Pursuant to 18 U.S.C. Section 1350,

as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

I, Frank Nitkiewicz, Executive Vice President and Chief Financial Officer of the Federal Home Loan Bank of Boston (“Registrant”) certify that, to the best of my knowledge:

1.The Registrant's Quarterly Report on Form 10-Q for the period ended March 31, 2017 (“Report”), fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

Date:	May 11, 2017	/s/ Frank Nitkiewicz
		Frank Nitkiewicz
		Executive Vice President and Chief Financial Officer

A signed original of this written statement required by Section 906 has been provided to the Federal Home Loan Bank of Boston and will be retained by the Federal Home Loan Bank of Boston and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2017	Apr. 30, 2017
Entity Information [Line Items]
Document Type	10-Q
Document Period End Date	Mar. 31, 2017
Amendment Flag	false
Entity Registrant Name	Federal Home Loan Bank of Boston
Entity Central Index Key	0001331463
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q1
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Common Class A [Member]
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		0
Common Class B [Member]
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		25,379,782

XML

Statements of Condition (unaudited) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
ASSETS
Cash and due from banks		$ 12,817	$ 520,031
Interest-bearing deposits		246,317	278
Securities purchased under agreements to resell		2,999,000	5,999,000
Federal funds sold		5,150,000	2,700,000
Investment securities:
Trading securities		516,150	612,622
Available-for-sale securities - includes $4,657 and $7,968 pledged as collateral at March 31, 2017, and December 31, 2016, respectively that may be repledged		6,299,801	6,588,664
Held-to-maturity securities - includes $17,127 and $23,618 pledged as collateral at March 31, 2017, and December 31, 2016, respectively that may be repledged	[1],[2]	2,004,511	2,130,767
Total investment securities		8,820,462	9,332,053
Advances		35,479,424	39,099,339
Mortgage loans held for portfolio, net of allowance for credit losses of $625 and $650 at March 31, 2017, and December 31, 2016, respectively		3,675,598	3,693,894
Accrued interest receivable		78,816	84,653
Premises, software, and equipment, net		5,500	5,211
Derivative assets, net		52,693	61,598
Other assets		48,175	49,529
Total Assets		56,568,802	61,545,586
Deposits
Interest-bearing		468,755	444,897
Non-interest-bearing		21,513	37,266
Total deposits		490,268	482,163
Consolidated obligations (COs):
Bonds		27,978,423	27,171,434
Discount notes		24,179,050	30,053,964
Total consolidated obligations		52,157,473	57,225,398
Mandatorily redeemable capital stock		32,677	32,687
Accrued interest payable		100,964	80,822
Affordable Housing Program (AHP) payable		80,170	81,627
Derivative liabilities, net		325,083	357,876
Other liabilities		36,306	40,235
Total liabilities		53,222,941	58,300,808
Commitments and contingencies (Note 18)
Capital
Capital stock – Class B – putable ($100 par value), 24,587 shares and 24,113 shares issued and outstanding at March 31, 2017, and December 31, 2016, respectively		2,458,667	2,411,306
Retained earnings:
Unrestricted		994,011	987,711
Restricted		236,755	229,275
Total retained earnings		1,230,766	1,216,986
Accumulated other comprehensive loss		(343,572)	(383,514)
Total capital		3,345,861	3,244,778
Total Liabilities and Capital		$ 56,568,802	$ 61,545,586

[1] Carrying value of held-to-maturity securities represents the sum of amortized cost and the amount of noncredit-related other-than-temporary impairment recognized in accumulated other comprehensive loss.

[2] Fair values of held-to-maturity securities were $2,249,437 and $2,372,290 at March 31, 2017, and December 31, 2016, respectively.

XML

Statements of Condition (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Available-for-sale securities pledged as collateral that may be repledged	$ 4,657	$ 7,968
Held-to-maturity securities pledged as collateral that may be repledged (a)	17,127	23,618
Allowance for credit losses	625	650
Fair value of held-to-maturity securities	$ 2,249,437	$ 2,372,290
Common Class B [Member]
Common Stock, Class B, putable shares issued	24,587	24,113
Common Stock, Class B, putable par value per share	$ 100	$ 100
Common Stock, Class B, putable shares outstanding	24,587	24,113

XML

Statements of Operations (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
INTEREST INCOME
Advances	$ 106,583	$ 78,219
Prepayment fees on advances, net	164	2,069
Securities purchased under agreements to resell	4,418	3,193
Federal funds sold	10,284	5,616
Investment securities:
Trading securities	2,553	2,236
Available-for-sale securities	24,664	25,145
Held-to-maturity securities	20,354	22,170
Prepayment fees on investments	65	325
Total investment securities	47,636	49,876
Mortgage loans held for portfolio	29,947	31,076
Other	59	107
Total interest income	199,091	170,156
Consolidated obligations:
Bonds	98,175	90,860
Discount notes	37,579	22,697
Total consolidated obligations	135,754	113,557
Deposits	502	115
Mandatorily redeemable capital stock	329	379
Other borrowings	2	1
Total interest expense	136,587	114,052
NET INTEREST INCOME	62,504	56,104
(Reduction of) provision for credit losses	(51)	11
NET INTEREST INCOME AFTER (REDUCTION OF) PROVISION FOR CREDIT LOSSES	62,555	56,093
OTHER INCOME (LOSS)
Total other-than-temporary impairment losses on investment securities	(53)	(442)
Net amount of impairment losses reclassified from accumulated other comprehensive loss	(365)	(905)
Net other-than-temporary impairment losses on investment securities, credit portion	(418)	(1,347)
Loss on early extinguishment of debt	0	(558)
Service fees	2,012	1,968
Net unrealized (losses) gains on trading securities	(1,414)	1,873
Net gains (losses) on derivatives and hedging activities	36	(6,235)
Other	(207)	(38)
Total other income	9	(4,337)
OTHER EXPENSE
Compensation and benefits	10,838	10,327
Other operating expenses	5,884	5,252
Federal Housing Finance Agency (the FHFA)	1,002	1,003
Office of Finance	842	816
Other	2,408	1,536
Total other expense	20,974	18,934
INCOME BEFORE ASSESSMENTS	41,590	32,822
AHP	4,192	3,320
NET INCOME	$ 37,398	$ 29,502

XML

Statements of Comprehensive Income (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 37,398	$ 29,502
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax, Portion Attributable to Parent [Abstract]
Net unrealized gains on available-for-sale securities	26,906	51,830
Net noncredit portion of other-than-temporary impairment losses on held-to-maturity securities
Net amount of impairment losses reclassified to non-interest income	365	905
Accretion of noncredit portion	8,296	9,141
Total net noncredit portion of other-than-temporary impairment losses on held-to-maturity securities	8,661	10,046
Net unrealized gains (losses) relating to hedging activities
Unrealized losses	(138)	(17,039)
Reclassification adjustment for previously deferred hedging gains and losses included in net income	4,319	7,211
Total net unrealized gains (losses) relating to hedging activities	4,181	(9,828)
Pension and postretirement benefits	194	119
Total other comprehensive income	39,942	52,167
Comprehensive income	$ 77,340	$ 81,669

XML

Statements of Capital (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of period	$ 3,244,778	$ 3,022,913
Comprehensive income	77,340	81,669
Proceeds from sale of capital stock	181,947	69,730
Repurchase of capital stock	(134,586)	(105,313)
Shares reclassified to mandatorily redeemable capital stock		(40)
Cash dividends on capital stock	(23,618)	(19,529)
Period end	3,345,861	3,049,430
Retained Earnings, Unrestricted
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of period	987,711	934,214
Comprehensive income	29,918	23,602
Cash dividends on capital stock	(23,618)	(19,529)
Period end	994,011	938,287
Retained Earnings, Restricted
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of period	229,275	194,634
Comprehensive income	7,480	5,900
Period end	236,755	200,534
Retained Earnings, Total
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of period	1,216,986	1,128,848
Comprehensive income	37,398	29,502
Cash dividends on capital stock	(23,618)	(19,529)
Period end	1,230,766	1,138,821
Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of period	(383,514)	(442,597)
Comprehensive income	39,942	52,167
Period end	$ (343,572)	$ (390,430)
Common Class B [Member] | Capital Stock Class B - Putable
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of period, shares	24,113	23,367
Beginning of period	$ 2,411,306	$ 2,336,662
Proceeds from sale of capital stock, shares	1,820	697
Proceeds from sale of capital stock	$ 181,947	$ 69,730
Repurchase of capital stock, shares	(1,346)	(1,053)
Repurchase of capital stock	$ (134,586)	$ (105,313)
Shares reclassified to mandatorily redeemable capital stock, shares		(1)
Shares reclassified to mandatorily redeemable capital stock		$ (40)
Period end, shares	24,587	23,010
Period end	$ 2,458,667	$ 2,301,039

XML

Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
OPERATING ACTIVITIES
Net income	$ 37,398	$ 29,502
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	(4,855)	(8,153)
(Reduction of) provision for credit losses	(51)	11
Change in net fair-value adjustments on derivatives and hedging activities	(3,811)	6,317
Net other-than-temporary impairment losses on investment securities, credit portion	418	1,347
Loss on early extinguishment of debt	0	558
Other adjustments	1,597	656
Net change in:
Market value of trading securities	1,414	(1,873)
Accrued interest receivable	5,837	4,798
Other assets	(2,404)	(1,190)
Accrued interest payable	20,142	11,890
Other liabilities	(5,724)	(3,217)
Total adjustments	12,563	11,144
Net cash provided by operating activities	49,961	40,646
INVESTING ACTIVITIES
Interest-bearing deposits	(225,734)	(87,084)
Securities purchased under agreements to resell	3,000,000	(324,000)
Federal funds sold	(2,450,000)	(1,370,000)
Premises, software, and equipment	(786)	(385)
Trading securities:
Proceeds from long-term	403,333	4,231
Purchases of long-term	(308,671)	0
Available-for-sale securities:
Proceeds from long-term	298,387	216,181
Purchases of long-term	0	(850,766)
Held-to-maturity securities:
Proceeds from long-term	146,485	134,411
Advances to members:
Proceeds	124,105,993	88,178,413
Disbursements	(120,511,148)	(86,556,909)
Mortgage loans held for portfolio:
Proceeds	122,979	106,852
Purchases	(108,181)	(102,896)
Proceeds from sale of foreclosed assets	1,384	1,595
Net cash provided by (used in) investing activities	4,474,041	(650,357)
FINANCING ACTIVITIES
Net change in deposits	8,105	79,270
Net payments on derivatives with a financing element	(2,353)	(3,386)
Net proceeds from issuance of consolidated obligations:
Discount notes	38,926,960	36,534,002
Bonds	2,094,792	5,722,758
Payments for maturing and retiring consolidated obligations:
Discount notes	(44,804,024)	(38,657,232)
Bonds	(1,278,430)	(3,191,164)
Proceeds from issuance of capital stock	181,947	69,730
Payments for redemption of mandatorily redeemable capital stock	(10)	(6,785)
Payments for repurchase of capital stock	(134,586)	(105,313)
Cash dividends paid	(23,617)	(19,529)
Net cash (used in) provided by financing activities	(5,031,216)	422,351
Net decrease in cash and due from banks	(507,214)	(187,360)
Cash and due from banks at beginning of the period	520,031	254,218	$ 254,218
Cash and due from banks at end of the period	12,817	66,858	520,031
Supplemental disclosures:
Interest paid	128,146	112,927
AHP payments	5,385	1,990	$ 18,575
Noncash transfers of mortgage loans held for portfolio to other assets	$ 940	$ 721

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Basis of Presentation

3 Months Ended

Mar. 31, 2017

Accounting Policies [Abstract]

Basis of Presentation [Text Block]

Basis of Presentation

The accompanying unaudited financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) for interim financial information. Accordingly, they do not include all of the information and footnotes required by GAAP for complete annual financial statements. In the opinion of management, all adjustments considered necessary have been included. All such adjustments consist of normal recurring accruals. The presentation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. The results of operations for interim periods are not necessarily indicative of the results to be expected for the year ending December 31, 2017. The unaudited financial statements should be read in conjunction with the Federal Home Loan Bank of Boston's audited financial statements and related notes in our Annual Report on Form 10-K for the year ended December 31, 2016, filed with the Securities and Exchange Commission (the SEC) on March 24, 2017 (the 2016 Annual Report). Unless otherwise indicated or the context requires otherwise, all references in this discussion to “the Bank,” "we," "us," "our," or similar references mean the Federal Home Loan Bank of Boston.

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Summary of Significant Accounting Policies Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2017

Accounting Policies [Abstract]

Basis of Presentation and Significant Accounting Policies [Text Block]

Summary of Significant Accounting Policies

As of March 31, 2017, we have not made any significant changes to the significant accounting policies described in Item 8 — Financial Statements and Supplementary Data — Note 18 — Fair Values in the 2016 Annual Report other than described below.

We utilize two derivatives clearing organizations (DCOs), for all cleared derivative transactions, LCH.Clearnet LLC and CME Clearing. Effective January 3, 2017, CME Clearing made certain amendments to its rulebook changing the legal characterization of variation margin payments to be daily settlement payments, rather than collateral transfers. We continue to characterize our variation margin related at LCH.Clearnet LLC contracts as cash collateral. At both DCOs, initial margin is considered cash collateral.

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Recently Issued and Adopted Accounting Guidance

3 Months Ended

Mar. 31, 2017

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

New Accounting Pronouncements and Changes in Accounting Principles [Text Block]

Recently Issued and Adopted Accounting Guidance

Premium Amortization on Purchased Callable Debt Securities.On March 30, 2017, the Financial Accounting Standards Board (FASB) issued amended guidance to shorten the amortization period for certain purchased callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. This guidance affects all entities that hold investments in callable debt securities that have an amortized cost basis in excess of the amount that is repayable by the issuer at the earliest call date (that is, at a premium). This guidance is effective for us for interim and annual periods beginning on January 1, 2019, and early adoption is permitted. This guidance should be applied using a modified retrospective method through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. We are in the process of evaluating this guidance and its effect on our financial condition, results of operations, and cash flows.

Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. On March 10, 2017, the FASB issued amended guidance to improve the presentation of net periodic pension cost and net periodic postretirement benefit cost. The amendments require that employers disaggregate the service cost component from the other components of net benefit cost. The amendments also provide explicit guidance on how to present the service cost component and the other components of net benefit cost in the income statement and allow only the service cost component of net benefit cost to be eligible for capitalization. This guidance is effective for us for interim and annual periods beginning on January 1, 2018, and early adoption is permitted. This guidance should be applied retrospectively for the presentation of the service cost component and the other components of net periodic pension cost and net periodic postretirement benefit cost in the income statement and prospectively, on and after the effective date, for the capitalization of the service cost component of net periodic pension cost and net periodic postretirement benefit in assets. We are in the process of evaluating this guidance and its effect on our financial condition, results of operations, and cash flows.

Contingent Put and Call Options in Debt Instruments. On March 14, 2016, the FASB issued amendments to clarify the requirements for assessing whether contingent call (put) options that can accelerate the payment of principal on debt instruments are clearly and closely related to their debt hosts. Specifically, the updated guidance clarifies what steps are required when assessing whether the economic characteristics and risks of call (put) options are clearly and closely related to the economic characteristics and risks of their debt hosts, which is one of the criteria for bifurcating an embedded derivative. Consequently, when a call (put) option is contingently exercisable, an entity does not have to assess whether the event that triggers the ability to exercise a call (put) option is related to interest rates or credit risks. We adopted this guidance on January 1, 2017. The adoption of this guidance did not have any effect on our financial condition, results of operations, and cash flows.

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Trading Securities

3 Months Ended

Mar. 31, 2017

Trading Securities [Abstract]

Trading Securities (and Certain Trading Assets) Disclosure [Text Block]

Trading Securities

Major Security Types. Our trading securities as of March 31, 2017, and December 31, 2016, were (dollars in thousands):

	March 31, 2017		December 31, 2016
U.S. Treasury obligations	$	308,698	$	399,521
Mortgage backed securities (MBS)
U.S. government-guaranteed – single-family	8,050		8,494
GSEs – single-family	644		768
GSEs – multifamily	198,758		203,839
	207,452		213,101
Total	$	516,150	$	612,622

Net unrealized losses or gains on trading securities for the three months ended March 31, 2017, and 2016, amounted to net losses of $1.4 million and net gains of $1.9 million for securities held on March 31, 2017, and 2016, respectively.

We do not participate in speculative trading practices and typically hold these investments over a longer time horizon.

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Available-for-Sale Securities

3 Months Ended

Mar. 31, 2017

Available-for-sale Securities [Abstract]

Available-for-Sale Securities Disclosure [Text Block]

Available-for-Sale Securities

Major Security Types. Our available-for-sale securities as of March 31, 2017, were (dollars in thousands):

			Amounts Recorded in Accumulated Other Comprehensive Loss
	Amortized Cost (1)		Unrealized Gains		Unrealized Losses			Fair  Value
State or local housing-finance-agency obligations (HFA securities)	$	9,350	$	—	$	(1,166	)	$	8,184
Supranational institutions	447,485		—		(25,146		)	422,339
U.S. government-owned corporations	313,779		—		(37,163		)	276,616
GSEs	129,336		—		(10,992		)	118,344
	899,950		—		(74,467		)	825,483
MBS
U.S. government guaranteed – single-family	119,919		62		(2,303		)	117,678
U.S. government guaranteed – multifamily	512,927		—		(2,795		)	510,132
GSEs – single-family	4,208,100		3,950		(36,542		)	4,175,508
GSEs – multifamily	668,808		2,192		—			671,000
	5,509,754		6,204		(41,640		)	5,474,318
Total	$	6,409,704	$	6,204	$	(116,107	)	$	6,299,801

_______________________

(1) Amortized cost of available-for-sale securities includes adjustments made to the cost basis of an investment for accretion, amortization, collection of cash, and fair-value hedge accounting adjustments.

Our available-for-sale securities as of December 31, 2016, were (dollars in thousands):

			Amounts Recorded in Accumulated Other Comprehensive Loss
	Amortized Cost (1)		Unrealized Gains		Unrealized Losses			Fair  Value
HFA securities	$	9,350	$	—	$	(1,204	)	$	8,146
Supranational institutions	452,021		—		(29,401		)	422,620
U.S. government-owned corporations	317,588		—		(45,631		)	271,957
GSEs	130,798		—		(13,330		)	117,468
	909,757		—		(89,566		)	820,191
MBS
U.S. government guaranteed – single-family	127,032		16		(2,321		)	124,727
U.S. government guaranteed – multifamily	565,593		45		(2,277		)	563,361
GSEs – single-family	4,447,803		1,765		(45,713		)	4,403,855
GSEs – multifamily	675,288		1,242		—			676,530
	5,815,716		3,068		(50,311		)	5,768,473
Total	$	6,725,473	$	3,068	$	(139,877	)	$	6,588,664

_______________________

(1) Amortized cost of available-for-sale securities includes adjustments made to the cost basis of an investment for accretion, amortization, collection of cash, and fair-value hedge accounting adjustments.

The following table summarizes our available-for-sale securities with unrealized losses as of March 31, 2017, which are aggregated by major security type and length of time that individual securities have been in a continuous unrealized loss position (dollars in thousands):

	Less than 12 Months					12 Months or More					Total
	Fair  Value		Unrealized  Losses			Fair  Value		Unrealized  Losses			Fair  Value		Unrealized  Losses
HFA securities	$	8,184	$	(1,166	)	$	—	$	—		$	8,184	$	(1,166	)
Supranational institutions	—		—			422,339		(25,146		)	422,339		(25,146		)
U.S. government-owned corporations	—		—			276,616		(37,163		)	276,616		(37,163		)
GSEs	—		—			118,344		(10,992		)	118,344		(10,992		)
	8,184		(1,166		)	817,299		(73,301		)	825,483		(74,467		)
MBS
U.S. government guaranteed – single-family	—		—			86,435		(2,303		)	86,435		(2,303		)
U.S. government guaranteed – multifamily	364,121		(1,760		)	146,011		(1,035		)	510,132		(2,795		)
GSEs – single-family	3,017,265		(30,967		)	327,482		(5,575		)	3,344,747		(36,542		)
	3,381,386		(32,727		)	559,928		(8,913		)	3,941,314		(41,640		)
Total temporarily impaired	$	3,389,570	$	(33,893	)	$	1,377,227	$	(82,214	)	$	4,766,797	$	(116,107	)

The following table summarizes our available-for-sale securities with unrealized losses as of December 31, 2016, which are aggregated by major security type and length of time that individual securities have been in a continuous unrealized loss position (dollars in thousands):

	Less than 12 Months					12 Months or More					Total
	Fair  Value		Unrealized  Losses			Fair  Value		Unrealized  Losses			Fair  Value		Unrealized  Losses
HFA securities	$	8,146	$	(1,204	)	$	—	$	—		$	8,146	$	(1,204	)
Supranational institutions	—		—			422,620		(29,401		)	422,620		(29,401		)
U.S. government-owned corporations	—		—			271,957		(45,631		)	271,957		(45,631		)
GSEs	—		—			117,468		(13,330		)	117,468		(13,330		)
	8,146		(1,204		)	812,045		(88,362		)	820,191		(89,566		)
MBS
U.S. government guaranteed – single-family	31,606		(4		)	90,854		(2,317		)	122,460		(2,321		)
U.S. government guaranteed – multifamily	326,126		(1,261		)	165,246		(1,016		)	491,372		(2,277		)
GSEs – single-family	3,517,094		(39,181		)	351,331		(6,532		)	3,868,425		(45,713		)
	3,874,826		(40,446		)	607,431		(9,865		)	4,482,257		(50,311		)
Total temporarily impaired	$	3,882,972	$	(41,650	)	$	1,419,476	$	(98,227	)	$	5,302,448	$	(139,877	)

Redemption Terms. The amortized cost and fair value of our available-for-sale securities by contractual maturity at March 31, 2017, and December 31, 2016, were (dollars in thousands):

	March 31, 2017				December 31, 2016
Year of Maturity	Amortized Cost		Fair  Value		Amortized Cost		Fair  Value
Due in one year or less	$	—	$	—	$	—	$	—
Due after one year through five years	9,350		8,184		9,350		8,146
Due after five years through 10 years	169,829		160,476		171,589		161,746
Due after 10 years	720,771		656,823		728,818		650,299
	899,950		825,483		909,757		820,191
MBS (1)	5,509,754		5,474,318		5,815,716		5,768,473
Total	$	6,409,704	$	6,299,801	$	6,725,473	$	6,588,664

_______________________

(1) MBS are not presented by contractual maturity because their expected maturities will likely differ from contractual maturities because borrowers of the underlying loans may have the right to call or prepay obligations with or without call or prepayment fees.

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Held-to-Maturity Securities

3 Months Ended

Mar. 31, 2017

Held-to-maturity Securities, Unclassified [Abstract]

Held-to-maturity Securities Disclosure [Text Block]

Held-to-Maturity Securities

Major Security Types. Our held-to-maturity securities as of March 31, 2017, were (dollars in thousands):

	Amortized Cost		Other-Than-Temporary Impairment Recognized in Accumulated Other Comprehensive Loss			Carrying Value		Gross Unrecognized Holding Gains		Gross Unrecognized Holding Losses			Fair Value
U.S. agency obligations	$	1,922	$	—		$	1,922	$	41	$	—		$	1,963
HFA securities	161,289		—			161,289		11		(17,212		)	144,088
	163,211		—			163,211		52		(17,212		)	146,051
MBS
U.S. government guaranteed – single-family	12,073		—			12,073		243		—			12,316
U.S. government guaranteed – multifamily	1,489		—			1,489		—		(3		)	1,486
GSEs – single-family	744,548		—			744,548		15,430		(455		)	759,523
GSEs – multifamily	296,207		—			296,207		10,735		—			306,942
Private-label – residential	957,620		(183,165		)	774,455		243,699		(7,609		)	1,010,545
Asset-backed securities (ABS) backed by home equity loans	13,080		(552		)	12,528		554		(508		)	12,574
	2,025,017		(183,717		)	1,841,300		270,661		(8,575		)	2,103,386
Total	$	2,188,228	$	(183,717	)	$	2,004,511	$	270,713	$	(25,787	)	$	2,249,437

Our held-to-maturity securities as of December 31, 2016, were (dollars in thousands):

	Amortized Cost		Other-Than-Temporary Impairment Recognized in Accumulated Other Comprehensive Loss			Carrying Value		Gross Unrecognized Holding Gains		Gross Unrecognized Holding Losses			Fair Value
U.S. agency obligations	$	2,159	$	—		$	2,159	$	56	$	—		$	2,215
HFA securities	162,568		—			162,568		11		(19,291		)	143,288
	164,727		—			164,727		67		(19,291		)	145,503
MBS
U.S. government guaranteed – single-family	12,719		—			12,719		246		—			12,965
U.S. government guaranteed – multifamily	1,532		—			1,532		—		—			1,532
GSEs – single-family	812,836		—			812,836		16,881		(519		)	829,198
GSEs – multifamily	318,667		—			318,667		11,692		—			330,359
Private-label – residential	999,149		(191,804		)	807,345		240,818		(8,373		)	1,039,790
ABS backed by home equity loans	13,515		(574		)	12,941		602		(600		)	12,943
	2,158,418		(192,378		)	1,966,040		270,239		(9,492		)	2,226,787
Total	$	2,323,145	$	(192,378	)	$	2,130,767	$	270,306	$	(28,783	)	$	2,372,290

The following table summarizes our held-to-maturity securities with unrealized losses as of March 31, 2017, which are aggregated by major security type and length of time that individual securities have been in a continuous unrealized loss position (dollars in thousands).

	Less than 12 Months					12 Months or More					Total
	Fair Value		Unrealized Losses			Fair  Value		Unrealized Losses			Fair Value		Unrealized Losses
HFA securities	$	—	$	—		$	141,759	$	(17,212	)	$	141,759	$	(17,212	)
MBS
U.S. government guaranteed - multifamily	1,486		(3		)	—		—			1,486		(3		)
GSEs – single-family	21,376		(331		)	23,144		(124		)	44,520		(455		)
Private-label – residential	14,825		(115		)	326,790		(23,148		)	341,615		(23,263		)
ABS backed by home equity loans	—		—			11,584		(656		)	11,584		(656		)
	37,687		(449		)	361,518		(23,928		)	399,205		(24,377		)
Total	$	37,687	$	(449	)	$	503,277	$	(41,140	)	$	540,964	$	(41,589	)

The following table summarizes our held-to-maturity securities with unrealized losses as of December 31, 2016, which are aggregated by major security type and length of time that individual securities have been in a continuous unrealized loss position (dollars in thousands).

	Less than 12 Months					12 Months or More					Total
	Fair Value		Unrealized Losses			Fair  Value		Unrealized Losses			Fair Value		Unrealized Losses
HFA securities	$	—	$	—		$	140,959	$	(19,291	)	$	140,959	$	(19,291	)
MBS
GSEs – single-family	83,291		(393		)	13,405		(126		)	96,696		(519		)
Private-label – residential	16,915		(128		)	397,407		(28,781		)	414,322		(28,909		)
ABS backed by home equity loans	—		—			11,898		(720		)	11,898		(720		)
	100,206		(521		)	422,710		(29,627		)	522,916		(30,148		)
Total	$	100,206	$	(521	)	$	563,669	$	(48,918	)	$	663,875	$	(49,439	)

Redemption Terms. The amortized cost, carrying value, and fair value of our held-to-maturity securities by contractual maturity at March 31, 2017, and December 31, 2016, are shown below (dollars in thousands). Expected maturities of some securities and MBS may differ from contractual maturities because borrowers of the underlying loans may have the right to call or prepay their obligations with or without call or prepayment fees.

	March 31, 2017						December 31, 2016
Year of Maturity	Amortized Cost		Carrying Value (1)		Fair Value		Amortized Cost		Carrying Value (1)		Fair Value
Due in one year or less	$	—	$	—	$	—	$	—	$	—	$	—
Due after one year through five years	16,401		16,401		16,446		16,637		16,637		16,663
Due after five years through 10 years	—		—		—		—		—		—
Due after 10 years	146,810		146,810		129,605		148,090		148,090		128,840
	163,211		163,211		146,051		164,727		164,727		145,503
MBS (2)	2,025,017		1,841,300		2,103,386		2,158,418		1,966,040		2,226,787
Total	$	2,188,228	$	2,004,511	$	2,249,437	$	2,323,145	$	2,130,767	$	2,372,290

_______________________

(1) Carrying value of held-to-maturity securities represents the sum of amortized cost and the amount of noncredit-related other-than-temporary impairment recognized in accumulated other comprehensive loss.

(2) MBS are not presented by contractual maturity because their expected maturities will likely differ from contractual maturities because borrowers of the underlying loans may have the right to call or prepay their obligations with or without call or prepayment fees.

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Other-Than-Temporary Impairment

3 Months Ended

Mar. 31, 2017

Other than Temporary Impairment Losses, Investments [Abstract]

Other-than-Temporary Impairment [Text Block]

Other-Than-Temporary Impairment

We evaluate our individual available-for-sale and held-to-maturity securities for other-than-temporary impairment each quarter.

Available-for-Sale Securities

We determined that none of our available-for-sale securities were other-than-temporarily impaired at March 31, 2017. At March 31, 2017, we held certain available-for-sale securities in an unrealized loss position. These unrealized losses reflect the impact of normal yield and spread fluctuations attendant with security markets. We consider these unrealized losses temporary because we expect to recover the entire amortized cost basis on these available-for-sale securities in an unrealized loss position and neither intend to sell these securities nor is it more likely than not that we will be required to sell these securities before the anticipated recovery of each security's remaining amortized cost basis. Additionally, there have been no shortfalls of principal or interest on any available-for-sale security.

Held-to-Maturity Securities

HFA Securities and Agency MBS. We have reviewed our investments in HFA securities and agency MBS and have determined that all unrealized losses are temporary. We do not intend to sell the investments nor is it more likely than not that we will be required to sell the investments before recovery of the amortized cost basis. We do not consider these investments to be other-than-temporarily impaired at March 31, 2017.

Private-Label Residential MBS and ABS Backed by Home Equity Loans. For those securities for which a credit loss was recognized during the three months endedMarch 31, 2017, the following table presents a summary of the average projected values over the remaining lives of the securities for the significant inputs used to measure the amount of the credit loss recognized in earnings, as well as related current credit enhancement. Credit enhancement is defined as the percentage of subordinated tranches, over-collateralization, and other credit enhancement, if any, in a security structure that will generally absorb losses before we will experience a credit loss on the security. The calculated averages represent the dollar-weighted average of Alt-A other-than-temporarily impaired private-label residential MBS (dollars in thousands).

			Weighted Average of Significant Inputs						Weighted Average Current Credit Enhancement
Private-label MBS by Classification	Par Value		Projected Prepayment Rates		Projected Default Rates		Projected Loss Severities
Alt-A - Private-label residential MBS (1)	$	46,262	7.7	%	31.7	%	37.6	%	4.4	%

_______________________

(1) Securities are classified based upon the current performance characteristics of the underlying loan pool and therefore the manner in which the loan pool backing the security has been modeled (as prime, Alt-A, or subprime), rather than their classification of the security at the time of issuance.

The following table sets forth our securities for which other-than-temporary impairment credit losses were recognized during the life of the security through March 31, 2017 (dollars in thousands). Securities are classified in the table below based on their classifications at the time of issuance.

	March 31, 2017
Other-Than-Temporarily Impaired Investment (1)	Par Value		Amortized Cost		Carrying Value		Fair Value
Private-label residential MBS – Prime	$	37,589	$	32,394	$	25,666	$	33,369
Private-label residential MBS – Alt-A	1,062,245		786,567		610,130		846,087
ABS backed by home equity loans – Subprime	3,670		3,359		2,808		3,362
Total other-than-temporarily impaired securities	$	1,103,504	$	822,320	$	638,604	$	882,818

_______________________

(1) We have instituted litigation related to certain of the private-label MBS in which we invested. Our complaint asserts, among others, claims for untrue or misleading statements in the sale of securities. It is possible that classifications of private-label MBS as provided herein when based on classification at the time of issuance as disclosed by those securities' issuance documents, as well as other statements about the securities, are inaccurate.

The following table presents a roll-forward of the amounts related to credit losses recognized in earnings. The roll-forward is the amount of credit losses on investment securities for which we recognized a portion of other-than-temporary impairment charges into accumulated other comprehensive loss (dollars in thousands).

	For the Three Months Ended March 31,
	2017			2016
Balance at beginning of period	$	490,404		$	533,888
Additions:
Additional credit losses for which an other-than-temporary impairment charge was previously recognized(1)	418			1,347
Reductions:
Increase in cash flows expected to be collected which are recognized over the remaining life of the security(2)	(8,601		)	(9,426		)
Balance at end of period	$	482,221		$	525,809

_______________________

(1) For the three monthsMarch 31, 2017 and 2016, additional credit losses for which an other-than-temporary impairment charge was previously recognized relate to securities that were also previously impaired prior to January 1, 2017 and 2016, respectively.

(2) Represents amounts accreted as interest income during the current period.

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Advances

3 Months Ended

Mar. 31, 2017

Advances [Abstract]

Federal Home Loan Bank, Advances [Text Block]

Advances

General Terms. At both March 31, 2017, and December 31, 2016, we had advances outstanding with interest rates ranging from zero percent to 7.72 percent as summarized below (dollars in thousands).

	March 31, 2017					December 31, 2016
Year of Contractual Maturity	Amount			Weighted Average Rate		Amount			Weighted Average Rate
Overdrawn demand-deposit accounts	$	7,935		1.21	%	$	3,780		0.92	%
Due in one year or less	17,444,622			1.22		18,783,802			1.05
Due after one year through two years	8,673,994			1.31		10,966,780			1.15
Due after two years through three years	2,821,139			1.72		2,508,459			1.67
Due after three years through four years	2,011,518			1.74		2,177,432			1.64
Due after four years through five years	1,889,679			1.86		2,041,269			1.80
Thereafter	2,671,123			1.63		2,633,333			1.70
Total par value	35,520,010			1.38	%	39,114,855			1.23	%
Premiums	21,143					22,633
Discounts	(28,551		)			(25,847		)
Fair value of bifurcated derivatives (1)	(576		)			(153		)
Hedging adjustments	(32,602		)			(12,149		)
Total	$	35,479,424				$	39,099,339

_________________________

(1) At March 31, 2017, and December 31, 2016, we had certain advances with embedded features that met the requirements to be separated from the host contract and designated as stand-alone derivatives.

At March 31, 2017, and December 31, 2016, we had callable advances and floating-rate advances that may be prepaid on a floating-rate reset date without prepayment or termination fees outstanding totaling $5.9 billion and $7.9 billion, respectively.

The following table sets forth our advances outstanding by the year of contractual maturity or next call date for callable advances (dollars in thousands):

Year of Contractual Maturity or Next Call Date (1), Par Value	March 31, 2017		December 31, 2016
Overdrawn demand-deposit accounts	$	7,935	$	3,780
Due in one year or less	23,108,797		26,447,977
Due after one year through two years	3,410,994		3,693,780
Due after two years through three years	2,821,139		2,508,459
Due after three years through four years	1,826,318		2,002,232
Due after four years through five years	1,739,679		1,891,269
Thereafter	2,605,148		2,567,358
Total par value	$	35,520,010	$	39,114,855

_______________________

(1) Also includes certain floating-rate advances that may be contractually prepaid by the borrower on a floating-rate reset date without incurring prepayment or termination fees.

At March 31, 2017, and December 31, 2016, we had putable advances outstanding totaling $3.3 billion and $3.4 billion, respectively.

The following table sets forth our advances outstanding by the year of contractual maturity or next put date for putable advances (dollars in thousands):

Year of Contractual Maturity or Next Put Date, Par Value	March 31, 2017		December 31, 2016
Overdrawn demand-deposit accounts	$	7,935	$	3,780
Due in one year or less	19,278,622		20,788,552
Due after one year through two years	8,991,244		10,946,530
Due after two years through three years	2,723,139		2,455,709
Due after three years through four years	1,842,518		1,974,932
Due after four years through five years	1,594,179		1,736,769
Thereafter	1,082,373		1,208,583
Total par value	$	35,520,010	$	39,114,855

Interest-Rate-Payment Terms. The following table details interest-rate-payment types for our outstanding advances (dollars in thousands):

Par value of advances	March 31, 2017		December 31, 2016
Fixed-rate	$	28,953,692	$	30,526,192
Variable-rate	6,566,318		8,588,663
Total par value	$	35,520,010	$	39,114,855

Credit-Risk Exposure and Security Terms. At March 31, 2017, and December 31, 2016, we had $12.4 billion and $16.2 billion, respectively, of advances issued to members with at least $1.0 billion of advances outstanding. These advances were made to six borrowers at both March 31, 2017, and December 31, 2016, representing 35.0 percent and 41.5 percent, respectively, of total par value of outstanding advances. For information related to our credit risk on advances and allowance for credit losses, see Note 10 — Allowance for Credit Losses.

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Mortgage Loans Held for Portfolio

3 Months Ended

Mar. 31, 2017

Mortgage Loans on Real Estate [Abstract]

Mortgage Loans Held for Portofolio [Text Block]

Mortgage Loans Held for Portfolio

We invest in mortgage loans through the Mortgage Partnership Finance^® (MPF^® program). These mortgage loans are either guaranteed or insured by federal agencies, as is the case with government mortgage loans, or are credit-enhanced by the related entity that sold the loan (a participating financial institution), as is the case with conventional mortgage loans. All such investments are held for portfolio.

The following table presents certain characteristics of these investments (dollars in thousands):

	March 31, 2017			December 31, 2016
Real estate
Fixed-rate 15-year single-family mortgages	$	509,001		$	528,486
Fixed-rate 20- and 30-year single-family mortgages	3,100,731			3,098,476
Premiums	66,437			67,523
Discounts	(1,681		)	(1,696		)
Deferred derivative gains, net	1,735			1,755
Total mortgage loans held for portfolio	3,676,223			3,694,544
Less: allowance for credit losses	(625		)	(650		)
Total mortgage loans, net of allowance for credit losses	$	3,675,598		$	3,693,894

The following table details the par value of mortgage loans held for portfolio (dollars in thousands):

	March 31, 2017		December 31, 2016
Conventional mortgage loans	$	3,228,586	$	3,235,835
Government mortgage loans	381,146		391,127
Total par value	$	3,609,732	$	3,626,962

See Note 10 — Allowance for Credit Losses for information related to our credit risk from our investments in mortgage loans and allowance for credit losses based on these investments.

"Mortgage Partnership Finance," and "MPF" are registered trademarks of the Federal Home Loan Bank of Chicago.

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Allowance for Credit Losses

3 Months Ended

Mar. 31, 2017

Receivables [Abstract]

Allowance for Credit Losses [Text Block]

Allowance for Credit Losses

An allowance for credit losses is a valuation allowance separately established for each identified portfolio segment, if necessary, to provide for probable losses inherent in our portfolio as of the statement of condition date. To the extent necessary, an allowance for credit losses for off-balance-sheet credit exposure is recorded as a liability.

For additional information see Item 8 — Financial Statements and Supplementary Data — Note 10 — Allowance for Credit Losses in the 2016 Annual Report.

Secured Member Credit Products

We manage our credit exposure to secured member credit products through an integrated approach that generally includes establishing a credit limit for each borrower, an ongoing review of each borrower's financial condition, and collateral and lending policies that are intended to limit risk of loss while balancing borrowers' needs for a reliable source of funding.

At March 31, 2017, and December 31, 2016, none of our secured member credit products outstanding were past due, on nonaccrual status, or considered impaired. In addition, there were no troubled debt restructurings related to credit products during the three months ended March 31, 2017 and 2016.

Based upon the collateral held as security, our credit extension and collateral policies, management's credit analysis, and the repayment history on secured member credit products, we have not recorded any allowance for credit losses on our secured member credit products at March 31, 2017, and December 31, 2016. At March 31, 2017, and December 31, 2016, no liability to reflect an allowance for credit losses for off-balance-sheet credit exposures was recorded. See Note 18 — Commitments and Contingencies for additional information on our off-balance-sheet credit exposure.

For additional information see Item 8 — Financial Statements and Supplementary Data — Note 10 — Allowance for Credit Losses in the 2016 Annual Report.

Government MortgageLoans Held for Portfolio

Based on our assessment of our servicers for our government loans, there is no allowance for credit losses for the government mortgage loan portfolio as of March 31, 2017, and December 31, 2016. In addition, these mortgage loans are not placed on nonaccrual status due to the government guarantee or insurance on these loans and the contractual obligation of the loan servicers to repurchase their related loans when certain criteria are met.

For additional information see Item 8 — Financial Statements and Supplementary Data — Note 10 — Allowance for Credit Losses in the 2016 Annual Report.

Conventional Mortgage Loans Held for Portfolio

For information on our conventional mortgage loans held for portfolio see Item 8 — Financial Statements and Supplementary Data — Note 10 — Allowance for Credit Losses in the 2016 Annual Report.

Credit Quality Indicators. Key credit quality indicators for mortgage loans include the migration of past due loans, nonaccrual loans, loans in process of foreclosure, and impaired loans. The tables below set forth certain key credit quality indicators for our investments in mortgage loans at March 31, 2017, and December 31, 2016 (dollars in thousands):

	March 31, 2017
	Recorded Investment in Conventional Mortgage Loans			Recorded Investment in Government Mortgage Loans			Total
Past due 30-59 days delinquent	$	27,972		$	14,051		$	42,023
Past due 60-89 days delinquent	7,066			3,647			10,713
Past due 90 days or more delinquent	14,464			5,093			19,557
Total past due	49,502			22,791			72,293
Total current loans	3,253,714			368,795			3,622,509
Total mortgage loans	$	3,303,216		$	391,586		$	3,694,802
Other delinquency statistics
In process of foreclosure, included above (1)	$	7,193		$	1,003		$	8,196
Serious delinquency rate (2)	0.46		%	1.30		%	0.55		%
Past due 90 days or more still accruing interest	$	—		$	5,093		$	5,093
Loans on nonaccrual status (3)	$	14,753		$	—		$	14,753

_______________________

(1) Includes loans where the decision of foreclosure or similar alternative such as pursuit of deed-in-lieu of foreclosure has been reported.

(2) Loans that are 90 days or more past due or in the process of foreclosure expressed as a percentage of the recorded investment in the total loan portfolio class.

(3) Includes conventional mortgage loans with contractual principal or interest payments 90 days or more past due and not accruing interest as well as loans modified within the previous six months under our temporary loan modification plan.

	December 31, 2016
	Recorded Investment in Conventional Mortgage Loans			Recorded Investment in Government Mortgage Loans			Total
Past due 30-59 days delinquent	$	26,757		$	14,878		$	41,635
Past due 60-89 days delinquent	5,508			3,846			9,354
Past due 90 days or more delinquent	16,379			5,807			22,186
Total past due	48,644			24,531			73,175
Total current loans	3,262,671			377,438			3,640,109
Total mortgage loans	$	3,311,315		$	401,969		$	3,713,284
Other delinquency statistics
In process of foreclosure, included above (1)	$	7,495		$	1,502		$	8,997
Serious delinquency rate (2)	0.53		%	1.44		%	0.63		%
Past due 90 days or more still accruing interest	$	—		$	5,807		$	5,807
Loans on nonaccrual status (3)	$	16,940		$	—		$	16,940

_______________________

(1) Includes loans where the decision of foreclosure or similar alternative such as pursuit of deed-in-lieu of foreclosure has been reported.

(2) Loans that are 90 days or more past due or in the process of foreclosure expressed as a percentage of the recorded investment in the total loan portfolio class.

(3) Includes conventional mortgage loans with contractual principal or interest payments 90 days or more past due and not accruing interest as well as loans modified within the previous six months under our temporary loan modification plan.

For information on how we collectively and individually evaluate mortgage loans for impairment see Item 8 — Financial Statements and Supplementary Data — Note 10 — Allowance for Credit Losses in the 2016 Annual Report.

Individually Evaluated Impaired Loans. The following tables present the recorded investment, par value and any related allowance for impaired loans individually assessed for impairment at March 31, 2017, and December 31, 2016, and the average recorded investment and interest income recognized on these loans during the three months ended March 31, 2017 and 2016 (dollars in thousands).

	As of March 31, 2017				As of December 31, 2016
	Recorded Investment		Par Value		Recorded Investment		Par Value
Individually evaluated impaired mortgage loans with no related allowance	$	21,352	$	21,311	$	22,945	$	22,905

	For the Three Months Ended March 31,
	2017				2016
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
Individually evaluated impaired mortgage loans with no related allowance	$	21,699	$	116	$	25,841	$	80

Credit Enhancements. Our allowance for credit losses factors in the credit enhancements associated with conventional mortgage loans under the MPF program. These credit enhancements apply after the homeowner's equity is exhausted and can include primary and/or supplemental mortgage insurance or other kinds of credit enhancement. The credit-enhancement amounts estimated to protect us against credit losses are determined through the use of a model. Any incurred losses that would be recovered from the credit enhancements are not reserved as part of our allowance for loan losses. In such cases, a receivable is generally established to reflect the expected recovery from credit-enhancement arrangements.

Previously, conventional mortgage loans were required to be credit enhanced so that the risk of loss was limited to the losses equivalent to an investment in a double-A rated MBS at the time of purchase. The FHFA final rule on acquired member assets (AMA) went into effect on January 18, 2017, allowing each FHLBank to utilize its own model to determine the credit enhancement for AMA loan assets and pool loans in lieu of a nationally recognized statistical ratings organization (NRSRO) ratings model. Upon effectiveness of the final AMA rule, we determined that assets delivered to us must be credit enhanced at our determined “AMA investment grade” of a double-A rated MBS. In March 2017, we determined that assets delivered to us must be credit enhanced at our revised determination of “AMA investment grade” of a single-A-minus rated MBS. This revision had no impact on the March 31, 2017, allowance for credit losses. We share the risk of credit losses on our investments in mortgage loans with the related participating financial institution by structuring potential losses on these investments into layers with respect to each master commitment. We analyze the risk characteristics of our mortgage loans using a third-party model to determine the credit enhancement amount at the time of purchase. This credit-enhancement amount is broken into a first-loss account and a credit-enhancement obligation of each participating financial institution, which may be calculated based on the risk analysis to equal the difference between the amounts needed for the master commitment to have a rating equivalent to a single-A-minus rated MBS and our initial first-loss account exposure.

Roll-Forward of Allowance for Credit Losses on Mortgage Loans. The following table presents a roll-forward of the allowance for credit losses on conventional mortgage loans for the three months ended March 31, 2017 and 2016, as well as the recorded investment in mortgage loans by impairment methodology at March 31, 2017 and 2016 (dollars in thousands). The recorded investment in a loan is the par amount of the loan, adjusted for accrued interest, unamortized premiums or discounts, deferred derivative gains and losses, and direct write-downs. The recorded investment is net of any valuation allowance.

	For the Three Months Ended March 31,
	2017			2016
Allowance for credit losses
Balance, beginning of period	$	650		$	1,025
Recoveries (charge-offs)	26			(11		)
(Reduction of) provision for credit losses	(51		)	11
Balance, end of period	$	625		$	1,025
Ending balance, individually evaluated for impairment	$	—		$	—
Ending balance, collectively evaluated for impairment	$	625		$	1,025
Recorded investment, end of period (1)
Individually evaluated for impairment	$	21,352		$	25,316
Collectively evaluated for impairment	$	3,281,864		$	3,151,522

_________________________

(1) These amounts exclude government mortgage loans because we make no allowance for credit losses based on our investments in government mortgage loans, as discussed above under — Government Mortgage Loans Held for Portfolio.

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Derivatives and Hedging Activities

3 Months Ended

Mar. 31, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives and Hedging Activities [Text Block]

Derivatives and Hedging Activities

The following table presents the notional amount and fair value of derivatives (excluding fair value adjustments related to variation margin for daily settled contracts) and total derivatives assets and liabilities. Total derivative asset and liabilities include the effect of netting adjustments, cash collateral, and variation margin for daily settled contracts as of March 31, 2017, and December 31, 2016 (dollars in thousands):

	March 31, 2017								December 31, 2016
	Notional Amount of Derivatives		Derivative Assets			Derivative Liabilities			Notional Amount of Derivatives		Derivative Assets		Derivative Liabilities
Derivatives designated as hedging instruments
Interest-rate swaps	$	17,424,429	$	58,357		$	(375,167	)	$	18,215,809	$	52,715	$	(413,026	)
Forward-start interest-rate swaps	527,800		—			(36,253		)	527,800		—		(36,250		)
Total derivatives designated as hedging instruments	17,952,229		58,357			(411,420		)	18,743,609		52,715		(449,276		)
Derivatives not designated as hedging instruments
Economic hedges:
Interest-rate swaps	1,099,500		1,995			(9,011		)	1,199,000		2,293		(10,840		)
Mortgage-delivery commitments (1)	37,827		202			(9		)	22,524		70		(171		)
Total derivatives not designated as hedging instruments	1,137,327		2,197			(9,020		)	1,221,524		2,363		(11,011		)
Total notional amount of derivatives	$	19,089,556							$	19,965,133
Total derivatives before netting and collateral adjustments			60,554			(420,440		)			55,078		(460,287		)
Netting adjustments, cash collateral, and variation margin for daily settled contracts including related accrued interest (2)			(7,861		)	95,357					6,520		102,411
Derivative assets and derivative liabilities			$	52,693		$	(325,083	)			$	61,598	$	(357,876	)

_______________________

(1) Mortgage-delivery commitments are classified as derivatives with changes in fair value recorded in other income.

(2) Amounts represent the effect of master-netting agreements intended to allow us to settle positive and negative positions with the same counterparty. Cash collateral and related accrued interest posted was $57.7 million and $109.8 million at March 31, 2017, and December 31, 2016, respectively. The change in cash collateral posted is included in the net change in interest-bearing deposits in the statement of cash flows. Cash collateral and related accrued interest received was $851,000 and $850,000 at March 31, 2017, and December 31, 2016, respectively. Variation margin for daily settled contracts was $30.6 million at March 31, 2017.

Net (losses) gains on derivatives and hedging activities recorded in Other Income (Loss) for the three months endedMarch 31, 2017 and 2016, were as follows (dollars in thousands):

	For the Three Months Ended March 31,
	2017			2016
Derivatives designated as hedging instruments
Interest-rate swaps	$	(659	)	$	(3,033	)
Forward-start interest-rate swaps	134			(346		)
Total net losses related to derivatives designated as hedging instruments	(525		)	(3,379		)
Derivatives not designated as hedging instruments:
Economic hedges:
Interest-rate swaps	153			(3,472		)
Mortgage-delivery commitments	357			616
Total net gains (losses) related to derivatives not designated as hedging instruments	510			(2,856		)
Other(1)	51			—
Net gains (losses) on derivatives and hedging activities	$	36		$	(6,235	)

______________

(1) Consists of price alignment amount on derivatives for which variation margin is characterized as a daily settlement amount.

The following tables present, by type of hedged item, the gains (losses) on derivatives and the related hedged items in fair-value hedge relationships and the impact of those derivatives on our net interest income for the three months endedMarch 31, 2017 and 2016 (dollars in thousands):

	For the Three Months Ended March 31, 2017
	Gain/(Loss) on Derivative		Gain/(Loss) on Hedged Item			Net Fair-Value Hedge Ineffectiveness			Effect of Derivatives on Net Interest Income (1)
Hedged Item:
Advances	$	21,095	$	(20,453	)	$	642		$	(13,405	)
Investments	10,268		(9,808		)	460			(8,341		)
COs – bonds	76		(1,837		)	(1,761		)	4,641
Total	$	31,439	$	(32,098	)	$	(659	)	$	(17,105	)

	For the Three Months Ended March 31, 2016
	Gain/(Loss) on Derivative			Gain/(Loss) on Hedged Item			Net Fair-Value Hedge Ineffectiveness			Effect of Derivatives on Net Interest Income (1)
Hedged Item:
Advances	$	(68,456	)	$	68,233		$	(223	)	$	(30,124	)
Investments	(49,455		)	49,839			384			(9,011		)
COs – bonds	10,267			(13,461		)	(3,194		)	8,072
Total	$	(107,644	)	$	104,611		$	(3,033	)	$	(31,063	)

______________

(1) The net interest on derivatives in fair-value hedge relationships is presented in the statement of operations as interest income or interest expense of the respective hedged item.

The following table presents the losses recognized in accumulated other comprehensive loss, the losses reclassified from accumulated other comprehensive loss into income, and the effect of our hedging activities on our net losses on derivatives and hedging activities in the statement of income for our forward-start interest-rate swaps associated with hedged CO bonds in cash-flow hedge relationships (dollars in thousands).

Derivatives and Hedged Items in Cash Flow Hedging Relationships	Losses Recognized in Other Comprehensive Loss on Derivatives (Effective Portion)			Location of Losses Reclassified from Accumulated Other Comprehensive Loss into Net Income (Effective Portion)	Losses Reclassified from Accumulated Other Comprehensive Loss into Net Income (Effective Portion)			Gains (Losses) Recognized in Net Losses on Derivatives and Hedging Activities (Ineffective Portion)
Interest-rate swaps - CO bonds
For the Three Months Ended March 31, 2017	$	(138	)	Interest expense	$	(4,315	)	$	134
For the Three Months Ended March 31, 2016	(17,039		)	Interest expense	(7,208		)	(346		)

For the three months endedMarch 31, 2017 and 2016, there were no reclassifications from accumulated other comprehensive loss into earnings as a result of the discontinuance of cash-flow hedges because the original forecasted transactions were not expected to occur by the end of the originally specified time period or within a two-month period thereafter. As of March 31, 2017, the maximum length of time over which we are hedging our exposure to the variability in future cash flows for forecasted transactions is eight years.

As of March 31, 2017, the amount of deferred net losses on derivatives accumulated in other comprehensive loss related to cash flow hedges expected to be reclassified to earnings during the next 12 months is $7.2 million.

Managing Credit Risk on Derivatives. We enter into derivatives that we clear (cleared derivatives) with a DCO, our counterparty for such derivatives. We also enter into derivatives that are not cleared (uncleared derivatives) under master-netting agreements. Certain of our uncleared derivatives master-netting agreements contain provisions that require us to post additional collateral with our uncleared derivatives counterparties if our credit ratings are lowered. Under the terms that govern such agreements, if our credit rating is lowered by Moody's Investors Services (Moody's) or Standard & Poor's Rating Service (S&P) to a certain level, we are required to deliver additional collateral on uncleared derivatives in a net liability position. In the event of a split between such credit ratings, the lower rating governs. The aggregate fair value of all uncleared derivatives with these provisions that were in a net-liability position (before cash collateral and related accrued interest) at March 31, 2017, was $355.3 million for which we had delivered collateral with a post-haircut value of $324.7 million in accordance with the terms of the master-netting agreements. Securities collateral is subject to valuation haircuts in accordance with the terms of the master-netting arrangements. The following table sets forth the post-haircut value of incremental collateral that certain uncleared derivatives counterparties could have required us to deliver based on incremental credit rating downgrades at March 31, 2017.

Post Haircut Value of Incremental Collateral to be Delivered  as of March 31, 2017 (dollars in thousands)
Ratings Downgrade (1)
From	To	Incremental Collateral
AA+	AA or AA-	$	11,638
AA-	A+, A or A-	12,399
A-	below A-	16,808

_______________________

(1) Ratings are expressed in this table according to S&P's conventions but include the equivalent of such rating by Moody's. If there is a split rating, the lower rating is used.

For cleared derivatives, the DCO is our counterparty. The DCO notifies the clearing member of the required initial and variation margin and our agent (clearing member) in turn notifies us. We utilize two DCOs, for all cleared derivative transactions, LCH.Clearnet LLC and CME Clearing. Effective January 3, 2017, CME Clearing made certain amendments to its rulebook, changing the legal characterization of variation margin payments to be daily settlement payments, rather than collateral. We continue to characterize our variation margin related to LCH.Clearnet LLC contracts as cash collateral. At both DCOs, initial margin is considered cash collateral. We post initial margin and exchange variation margin through a clearing member who acts as our agent to the DCO and who guarantees our performance to the DCO, subject to the terms of relevant agreements. These arrangements expose us to credit risk in the event that one of our clearing members or one of the DCOs fails to meet its obligations. The use of cleared derivatives is intended to mitigate credit risk exposure because the DCO, which is fully secured at all times through margin received from its clearing members, is substituted for the credit risk exposure of individual counterparties in uncleared derivatives, and collateral is posted at least once daily for changes in the fair value of cleared derivatives through a clearing member.

We have analyzed the rights, rules, and regulations governing our cleared derivatives and determined that those rights, rules, and regulations should result in a net claim through each of our clearing members with the related DCO upon an event of default including a bankruptcy, insolvency or similar proceeding involving the DCO or one of our clearing members, or both. For this purpose, net claim generally means a single net amount reflecting the aggregation of all amounts indirectly owed by us to the relevant DCO and indirectly payable to us from the relevant DCO. Based on this analysis, we are presenting a net derivative receivable or payable for all of our transactions through a particular clearing member with a particular DCO.

For cleared derivatives, the DCO determines initial margin requirements. We clear our trades via clearing members of the DCOs. The clearing members who act as our agent to the DCOs are U.S. Commodity Futures Trading Commission (the CFTC)- registered futures commission merchants. Our clearing members may require us to post margin in excess of DCO requirements based on our credit or other considerations, including but not limited to, credit rating downgrades. We were not required to post any such excess margin by our clearing members based on credit considerations at March 31, 2017.

Offsetting of Certain Derivatives. We present derivatives, any related cash collateral, including initial and certain variation margin, received or pledged, and associated accrued interest, on a net basis by counterparty.

The following table presents separately the fair value of derivatives that are subject to netting due to a legal right of offset based on the terms of our master netting arrangements or similar agreements as of March 31, 2017, and December 31, 2016 and the fair value of derivatives that are not subject to such netting (dollars in thousands). Such netting includes any related cash collateral received from or pledged to counterparties and variation margin for daily settled contracts.

	March 31, 2017						December 31, 2016
	Derivative Assets			Derivative Liabilities			Derivative Assets			Derivative Liabilities
Derivatives meeting netting requirements
Gross recognized amount
Uncleared derivatives	$	13,350		$	(367,754	)	$	12,594		$	(405,310	)
Cleared derivatives	47,002			(52,677		)	42,414			(54,806		)
Total gross recognized amount	60,352			(420,431		)	55,008			(460,116		)
Gross amounts of netting adjustments, cash collateral, and variation margin for daily settled contracts
Uncleared derivatives	(12,518		)	42,680			(12,028		)	47,605
Cleared derivatives	4,657			52,677			18,548			54,806
Total gross amounts of netting adjustments, cash collateral, and variation margin for daily settled contracts	(7,861		)	95,357			6,520			102,411
Net amounts after netting adjustments, cash collateral, and variation margin for daily settled contracts
Uncleared derivatives	832			(325,074		)	566			(357,705		)
Cleared derivatives	51,659			—			60,962			—
Total net amounts after netting adjustments, cash collateral, and variation margin for daily settled contracts	52,491			(325,074		)	61,528			(357,705		)
Derivatives not meeting netting requirements
Mortgage delivery commitments	202			(9		)	70			(171		)
Total derivative assets and total derivative liabilities
Uncleared derivatives	832			(325,074		)	566			(357,705		)
Cleared derivatives	51,659			—			60,962			—
Mortgage delivery commitments	202			(9		)	70			(171		)
Total derivative assets and total derivative liabilities presented in the statement of condition	52,693			(325,083		)	61,598			(357,876		)
Non-cash collateral received or pledged not offset (1)
Can be sold or repledged
Uncleared derivatives	—			21,063			—			30,306
Cannot be sold or repledged
Uncleared derivatives	—			278,113			—			290,444
Total non-cash collateral received or pledged, not offset	—			299,176			—			320,750
Net amount
Uncleared derivatives	832			(25,898		)	566			(36,955		)
Cleared derivatives	51,659			—			60,962			—
Mortgage delivery commitments	202			(9		)	70			(171		)
Total net amount	$	52,693		$	(25,907	)	$	61,598		$	(37,126	)

_______________________

(1) Includes non-cash collateral at fair value. Any overcollateralization with a counterparty is not included in the determination of the net amount. At March 31, 2017, and December 31, 2016, we had additional net credit exposure of $1.1 million and $2.0 million, respectively, due to instances where our collateral pledged to a counterparty exceeded our net derivative liability position.

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Deposits

3 Months Ended

Mar. 31, 2017

Deposits [Abstract]

Deposits [Text Block]

Deposits

We offer demand and overnight deposits for members and qualifying nonmembers. In addition, we offer short-term interest-bearing deposit programs to members. Members that service mortgage loans may deposit funds collected in connection with mortgage loans pending disbursement of such funds to the owners of the mortgage loans. We classify these items as "other" in the following table.

The following table details interest- and noninterest-bearing deposits (dollars in thousands):

	March 31, 2017		December 31, 2016
Interest-bearing
Demand and overnight	$	465,931	$	440,731
Other	2,824		4,166
Noninterest-bearing
Other	21,513		37,266
Total deposits	$	490,268	$	482,163

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Consolidated Obligations

3 Months Ended

Mar. 31, 2017

Debt Disclosure [Abstract]

Consolidated Obligations [Text Block]

Consolidated Obligations

COs - Bonds. The following table sets forth the outstanding CO bonds for which we were primarily liable at March 31, 2017, and December 31, 2016, by year of contractual maturity (dollars in thousands):

	March 31, 2017					December 31, 2016
Year of Contractual Maturity	Amount			Weighted Average Rate (1)		Amount			Weighted Average Rate (1)
Due in one year or less	$	11,252,735		1.37	%	$	8,734,955		1.43	%
Due after one year through two years	6,436,440			1.31		7,752,420			1.19
Due after two years through three years	3,197,930			1.71		3,297,120			1.63
Due after three years through four years	1,361,695			1.89		1,637,335			1.87
Due after four years through five years	2,551,775			1.68		2,574,375			1.65
Thereafter	3,147,595			2.73		3,135,745			2.70
Total par value	27,948,170			1.60	%	27,131,950			1.58	%
Premiums	106,776					118,145
Discounts	(14,606		)			(14,906		)
Hedging adjustments	(61,917		)			(63,755		)
	$	27,978,423				$	27,171,434

_______________________

(1) The CO bonds' weighted-average rate excludes concession fees.

Our CO bonds outstanding at March 31, 2017, and December 31, 2016, included (dollars in thousands):

	March 31, 2017		December 31, 2016
Par value of CO bonds
Noncallable and nonputable	$	23,290,170	$	22,388,950
Callable	4,658,000		4,743,000
Total par value	$	27,948,170	$	27,131,950

The following is a summary of the CO bonds for which we were primarily liable at March 31, 2017, and December 31, 2016, by year of contractual maturity or next call date for callable CO bonds (dollars in thousands):

Year of Contractual Maturity or Next Call Date	March 31, 2017		December 31, 2016
Due in one year or less	$	15,067,735	$	12,858,955
Due after one year through two years	5,916,440		7,013,420
Due after two years through three years	2,979,930		2,904,120
Due after three years through four years	1,013,695		1,289,335
Due after four years through five years	1,284,775		1,242,375
Thereafter	1,685,595		1,823,745
Total par value	$	27,948,170	$	27,131,950

The following table sets forth the CO bonds for which we were primarily liable by interest-rate-payment type at March 31, 2017, and December 31, 2016 (dollars in thousands):

	March 31, 2017		December 31, 2016
Par value of CO bonds
Fixed-rate	$	20,386,170	$	20,289,950
Simple variable-rate	6,005,000		5,300,000
Step-up	1,557,000		1,542,000
Total par value	$	27,948,170	$	27,131,950

COs – Discount Notes. Outstanding CO discount notes for which we were primarily liable, all of which are due within one year, were as follows (dollars in thousands):

	Book Value		Par Value		Weighted Average Rate (1)
March 31, 2017	$	24,179,050	$	24,193,530	0.65	%
December 31, 2016	$	30,053,964	$	30,070,103	0.47	%

_______________________

(1) The CO discount notes' weighted-average rate represents a yield to maturity excluding concession fees.

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Affordable Housing Program

3 Months Ended

Mar. 31, 2017

Affordable Housing Program [Abstract]

Affordable Housing Program [Text Block]

Affordable Housing Program

The following table presents a roll-forward of the AHP liability for the three months endedMarch 31, 2017, and year ended December 31, 2016 (dollars in thousands):

	March 31, 2017			December 31, 2016
Balance at beginning of period	$	81,627		$	82,081
AHP expense for the period	4,192			19,397
AHP direct grant disbursements	(5,385		)	(18,575		)
AHP subsidy for AHP advance disbursements	(267		)	(1,378		)
Return of previously disbursed grants and subsidies	3			102
Balance at end of period	$	80,170		$	81,627

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Capital

3 Months Ended

Mar. 31, 2017

Capital [Abstract]

Capital [Text Block]

Capital

We are subject to capital requirements under our capital plan, the Federal Home Loan Bank Act of 1932, as amended (the FHLBank Act), and FHFA regulations:

1. Risk-based capital. We are required to maintain at all times permanent capital, defined as Class B stock, including Class B stock classified as mandatorily redeemable capital stock, and retained earnings, in an amount at least equal to the sum of our credit-risk capital requirement, market-risk capital requirement, and operations-risk capital requirement, calculated in accordance with FHFA rules and regulations, referred to herein as the risk-based capital requirement. Only permanent capital satisfies the risk-based capital requirement.

2. Total regulatory capital. We are required to maintain at all times a total capital-to-assets ratio of at least four percent. Total regulatory capital is the sum of permanent capital, the amount paid-in for Class A stock, the amount of any general loss allowance if consistent with GAAP and not established for specific assets, and other amounts from sources determined by the FHFA as available to absorb losses. We have never issued Class A stock.

3. Leverage capital. We are required to maintain at all times a leverage capital-to-assets ratio of at least five percent. Leverage capital is defined as the sum of permanent capital weighted 1.5 times and all other capital without a weighting factor.

The FHFA may require us to maintain a greater amount of permanent capital than is required as defined by the risk-based capital requirements.

The following tables demonstrate our compliance with our regulatory capital requirements at March 31, 2017, and December 31, 2016 (dollars in thousands):

Risk-Based Capital Requirements	March 31, 2017		December 31, 2016
Permanent capital
Class B capital stock	$	2,458,667	$	2,411,306
Mandatorily redeemable capital stock	32,677		32,687
Retained earnings	1,230,766		1,216,986
Total permanent capital	$	3,722,110	$	3,660,979
Risk-based capital requirement
Credit-risk capital	$	352,679	$	355,182
Market-risk capital	168,602		118,765
Operations-risk capital	156,385		142,184
Total risk-based capital requirement	$	677,666	$	616,131
Permanent capital in excess of risk-based capital requirement	$	3,044,444	$	3,044,848

	March 31, 2017						December 31, 2016
	Required			Actual			Required			Actual
Capital Ratio
Risk-based capital	$	677,666		$	3,722,110		$	616,131		$	3,660,979
Total regulatory capital	$	2,262,752		$	3,722,110		$	2,461,823		$	3,660,979
Total capital-to-asset ratio	4.0		%	6.6		%	4.0		%	5.9		%
Leverage Ratio
Leverage capital	$	2,828,440		$	5,583,165		$	3,077,279		$	5,491,469
Leverage capital-to-assets ratio	5.0		%	9.9		%	5.0		%	8.9		%

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Accumulated Other Comprehensive Loss

3 Months Ended

Mar. 31, 2017

AOCI Attributable to Parent [Abstract]

Accumulated Other Comprehensive Loss [Text Block]

Accumulated Other Comprehensive Loss

The following table presents a summary of changes in accumulated other comprehensive loss for the three months endedMarch 31, 2017 and 2016 (dollars in thousands):

	Net Unrealized Loss on Available-for-sale Securities			Noncredit Portion of Other-than-temporary Impairment Losses on Held-to-maturity Securities			Net Unrealized Loss Relating to Hedging Activities			Pension and Postretirement Benefits			Total Accumulated Other Comprehensive Loss
Balance, December 31, 2015	$	(137,718	)	$	(229,785	)	$	(71,237	)	$	(3,857	)	$	(442,597	)
Other comprehensive income (loss) before reclassifications:
Net unrealized gains (losses)	51,830			—			(17,039		)	—			34,791
Noncredit other-than-temporary impairment losses	—			(8		)	—			—			(8		)
Accretion of noncredit loss	—			9,141			—			—			9,141
Net actuarial gain	—			—			—			1			1
Reclassifications from other comprehensive income to net income
Noncredit other-than-temporary impairment losses reclassified to credit loss (1)	—			913			—			—			913
Amortization - hedging activities (2)	—			—			7,211			—			7,211
Amortization - pension and postretirement benefits (3)	—			—			—			118			118
Other comprehensive income (loss)	51,830			10,046			(9,828		)	119			52,167
Balance, March 31, 2016	$	(85,888	)	$	(219,739	)	$	(81,065	)	$	(3,738	)	$	(390,430	)
Balance, December 31, 2016	$	(136,809	)	$	(192,379	)	$	(48,187	)	$	(6,139	)	$	(383,514	)
Other comprehensive income (loss) before reclassifications:
Net unrealized gains (losses)	26,906			—			(138		)	—			26,768
Accretion of noncredit loss	—			8,296			—			—			8,296
Reclassifications from other comprehensive income to net income
Noncredit other-than-temporary impairment losses reclassified to credit loss (1)	—			365			—			—			365
Amortization - hedging activities (4)	—			—			4,319			—			4,319
Amortization - pension and postretirement benefits (3)	—			—			—			194			194
Other comprehensive income	26,906			8,661			4,181			194			39,942
Balance, March 31, 2017	$	(109,903	)	$	(183,718	)	$	(44,006	)	$	(5,945	)	$	(343,572	)

_______________________

(1) Recorded in net amount of impairment losses reclassified to (from) accumulated other comprehensive loss in the statement of operations.

(2) Amortization of hedging activities includes $7.2 million recorded in CO bond interest expense and $4,000 recorded in net gains (losses) on derivatives and hedging activities in the statement of operations.

(3) Recorded in other operating expenses in the statement of operations.

(4) Amortization of hedging activities includes $4.3 million recorded in CO bond interest expense and $4,000 recorded in net gains (losses) on derivatives and hedging activities in the statement of operations.

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Fair Values

3 Months Ended

Mar. 31, 2017

Fair Value Disclosures [Abstract]

Fair Value [Text Block]

Fair Values

A fair-value hierarchy is used to prioritize the inputs of valuation techniques used to measure fair value. A description of the application of the fair-value hierarchy, valuation techniques, and significant inputs is disclosed in Item 8 — Financial Statements and Supplementary Data — Note 18 — Fair Values in the 2016 Annual Report. There have been no material changes in the fair-value hierarchy classification of financial assets and liabilities, valuation techniques, or significant inputs during the three months endedMarch 31, 2017.

The carrying values, fair values, and fair-value hierarchy of our financial instruments at March 31, 2017, and December 31, 2016, were as follows (dollars in thousands). These fair values do not represent an estimate of our overall market value as a going concern, which would take into account, among other things, our future business opportunities and the net profitability of our assets and liabilities.

	March 31, 2017
	Carrying Value			Total Fair Value			Level 1			Level 2			Level 3		Netting Adjustments and Cash Collateral
Financial instruments
Assets:
Cash and due from banks	$	12,817		$	12,817		$	12,817		$	—		$	—	$	—
Interest-bearing deposits	246,317			246,317			246,317			—			—		—
Securities purchased under agreements to resell	2,999,000			2,998,891			—			2,998,891			—		—
Federal funds sold	5,150,000			5,149,928			—			5,149,928			—		—
Trading securities(1)	516,150			516,150			—			516,150			—		—
Available-for-sale securities(1)	6,299,801			6,299,801			—			6,291,617			8,184		—
Held-to-maturity securities	2,004,511			2,249,437			—			1,082,230			1,167,207		—
Advances	35,479,424			35,643,128			—			35,643,128			—		—
Mortgage loans, net	3,675,598			3,708,652			—			3,682,550			26,102		—
Accrued interest receivable	78,816			78,816			—			78,816			—		—
Derivative assets(1)	52,693			52,693			—			60,554			—		(7,861		)
Other assets (1)	21,046			21,046			11,652			9,394			—		—
Liabilities:
Deposits	(490,268		)	(490,263		)	—			(490,263		)	—		—
COs:
Bonds	(27,978,423		)	(28,100,611		)	—			(28,100,611		)	—		—
Discount notes	(24,179,050		)	(24,177,609		)	—			(24,177,609		)	—		—
Mandatorily redeemable capital stock	(32,677		)	(32,677		)	(32,677		)	—			—		—
Accrued interest payable	(100,964		)	(100,964		)	—			(100,964		)	—		—
Derivative liabilities(1)	(325,083		)	(325,083		)	—			(420,440		)	—		95,357
Other:
Commitments to extend credit for advances	—			(4,811		)	—			(4,811		)	—		—
Standby letters of credit	(1,040		)	(1,040		)	—			(1,040		)	—		—

_______________________

(1) Carried at fair value on a recurring basis.

	December 31, 2016
	Carrying Value			Total Fair Value			Level 1			Level 2			Level 3		Netting Adjustments and Cash Collateral
Financial instruments
Assets:
Cash and due from banks	$	520,031		$	520,031		$	520,031		$	—		$	—	$	—
Interest-bearing deposits	278			278			278			—			—		—
Securities purchased under agreements to resell	5,999,000			5,998,799			—			5,998,799			—		—
Federal funds sold	2,700,000			2,699,949			—			2,699,949			—		—
Trading securities(1)	612,622			612,622			—			612,622			—		—
Available-for-sale securities(1)	6,588,664			6,588,664			—			6,580,518			8,146		—
Held-to-maturity securities	2,130,767			2,372,290			—			1,176,269			1,196,021		—
Advances	39,099,339			39,273,044			—			39,273,044			—		—
Mortgage loans, net	3,693,894			3,736,548			—			3,708,123			28,425		—
Accrued interest receivable	84,653			84,653			—			84,653			—		—
Derivative assets(1)	61,598			61,598			—			55,078			—		6,520
Other assets(1)	17,779			17,779			8,394			9,385			—		—
Liabilities:
Deposits	(482,163		)	(482,158		)	—			(482,158		)	—		—
COs:
Bonds	(27,171,434		)	(27,298,499		)	—			(27,298,499		)	—		—
Discount notes	(30,053,964		)	(30,054,085		)	—			(30,054,085		)	—		—
Mandatorily redeemable capital stock	(32,687		)	(32,687		)	(32,687		)	—			—		—
Accrued interest payable	(80,822		)	(80,822		)	—			(80,822		)	—		—
Derivative liabilities(1)	(357,876		)	(357,876		)	—			(460,287		)	—		102,411
Other:
Commitments to extend credit for advances	—			(4,412		)	—			(4,412		)	—		—
Standby letters of credit	(1,064		)	(1,064		)	—			(1,064		)	—		—

_______________________

(1) Carried at fair value on a recurring basis.

Fair Value Measured on a Recurring Basis.

The following tables present our assets and liabilities that are measured at fair value on the statement of condition, which are recorded on a recurring basis at March 31, 2017, and December 31, 2016, by fair-value hierarchy level (dollars in thousands):

	March 31, 2017
	Level 1		Level 2			Level 3		Netting Adjustment (1)			Total
Assets:
Trading securities:
U.S. Treasury obligations	$	—	$	308,698		$	—	$	—		$	308,698
U.S. government-guaranteed – single-family MBS	—		8,050			—		—			8,050
GSEs – single-family MBS	—		644			—		—			644
GSEs – multifamily MBS	—		198,758			—		—			198,758
Total trading securities	—		516,150			—		—			516,150
Available-for-sale securities:
State or local HFA securities	—		—			8,184		—			8,184
Supranational institutions	—		422,339			—		—			422,339
U.S. government-owned corporations	—		276,616			—		—			276,616
GSEs	—		118,344			—		—			118,344
U.S. government guaranteed – single-family MBS	—		117,678			—		—			117,678
U.S. government guaranteed – multifamily MBS	—		510,132			—		—			510,132
GSEs – single-family MBS	—		4,175,508			—		—			4,175,508
GSEs – multifamily MBS	—		671,000			—		—			671,000
Total available-for-sale securities	—		6,291,617			8,184		—			6,299,801
Derivative assets:
Interest-rate-exchange agreements	—		60,352			—		(7,861		)	52,491
Mortgage delivery commitments	—		202			—		—			202
Total derivative assets	—		60,554			—		(7,861		)	52,693
Other assets	11,652		9,394			—		—			21,046
Total assets at fair value	$	11,652	$	6,877,715		$	8,184	$	(7,861	)	$	6,889,690
Liabilities:
Derivative liabilities
Interest-rate-exchange agreements	$	—	$	(420,431	)	$	—	$	95,357		$	(325,074	)
Mortgage delivery commitments	—		(9		)	—		—			(9		)
Total liabilities at fair value	$	—	$	(420,440	)	$	—	$	95,357		$	(325,083	)

_______________________

(1) These amounts represent the application of the netting requirements which allow us to settle positive and negative positions and also cash collateral and related accrued interest held or placed with the same clearing member and/or counterparty.

	December 31, 2016
	Level 1		Level 2			Level 3		Netting Adjustment (1)		Total
Assets:
Trading securities:
U.S. Treasury obligations	$	—	$	399,521		$	—	$	—	$	399,521
U.S. government-guaranteed – single-family MBS	—		8,494			—		—		8,494
GSEs – single-family MBS	—		768			—		—		768
GSEs – multifamily MBS	—		203,839			—		—		203,839
Total trading securities	—		612,622			—		—		612,622
Available-for-sale securities:
State or local HFA securities	—		—			8,146		—		8,146
Supranational institutions	—		422,620			—		—		422,620
U.S. government-owned corporations	—		271,957			—		—		271,957
GSEs	—		117,468			—		—		117,468
U.S. government guaranteed – single-family MBS	—		124,727			—		—		124,727
U.S. government guaranteed – multifamily MBS	—		563,361			—		—		563,361
GSEs – single-family MBS	—		4,403,855			—		—		4,403,855
GSEs – multifamily MBS	—		676,530			—		—		676,530
Total available-for-sale securities	—		6,580,518			8,146		—		6,588,664
Derivative assets:
Interest-rate-exchange agreements	—		55,008			—		6,520		61,528
Mortgage delivery commitments	—		70			—		—		70
Total derivative assets	—		55,078			—		6,520		61,598
Other assets	8,394		9,385			—		—		17,779
Total assets at fair value	$	8,394	$	7,257,603		$	8,146	$	6,520	$	7,280,663
Liabilities:
Derivative liabilities
Interest-rate-exchange agreements	$	—	$	(460,116	)	$	—	$	102,411	$	(357,705	)
Mortgage delivery commitments	—		(171		)	—		—		(171		)
Total liabilities at fair value	$	—	$	(460,287	)	$	—	$	102,411	$	(357,876	)

_______________________

(1) These amounts represent the application of the netting requirements which allow us to settle positive and negative positions and also cash collateral and related accrued interest held or placed with the same clearing member and/or counterparty.

The following table presents a reconciliation of available-for-sale securities that are measured at fair value on a recurring basis

using significant unobservable inputs (Level 3) during the three months endedMarch 31, 2017. There were no Level 3 available-for-sale securities during the three months endedMarch 31, 2016 (dollars in thousands).

	March 31, 2017
Balance at beginning of period	$	8,146
Purchases	—
Unrealized gains included in other comprehensive income	38
Balance at end of period	$	8,184

Fair Value on a Nonrecurring Basis

We measure certain held-to-maturity investment securities, mortgage loans held for portfolio, and real-estate-owned property (REO) at fair value on a nonrecurring basis, that is, they are not measured at fair value on an ongoing basis but are subject to fair-value adjustments only in certain circumstances (for example, upon recognizing an other-than-temporary impairment on a held-to-maturity security).

The following tables present financial assets by level within the fair-value hierarchy which were recorded at fair value on a nonrecurring basis. The fair values presented are as of the date the fair value adjustment was recorded (dollars in thousands).

	March 31, 2017
	Level 1		Level 2		Level 3		Total
Held-to-maturity securities:
Private-label residential MBS	$	—	$	—	$	5,264	$	5,264
Mortgage loans held for portfolio	—		—		5,145		5,145
REO	—		—		544		544
Total assets recorded at fair value on a nonrecurring basis	$	—	$	—	$	10,953	$	10,953

	December 31, 2016
	Level 1		Level 2		Level 3		Total
Held-to-maturity securities:
Private-label residential MBS	$	—	$	—	$	8,498	$	8,498
Mortgage loans held for portfolio	—		—		5,618		5,618
REO	—		—		786		786
Total assets recorded at fair value on a nonrecurring basis	$	—	$	—	$	14,902	$	14,902

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies [Text Block]

Commitments and Contingencies

Joint and Several Liability. COs are backed by the financial resources of the FHLBanks. The FHFA has authority to require any FHLBank to repay all or a portion of the principal and interest on COs for which another FHLBank is the primary obligor. No FHLBank has ever been asked or required to repay the principal or interest on any CO on behalf of another FHLBank. We evaluate the financial condition of the other FHLBanks primarily based on known regulatory actions, publicly available financial information, and individual long-term credit-rating action as of each period-end presented. Based on this evaluation, as of March 31, 2017, and through the filing of this report, we believe there is a remote likelihood that we will be required to repay the principal or interest on any CO on behalf of another FHLBank.

We have considered applicable FASB guidance and determined it is not necessary to recognize a liability for the fair value of our joint and several liability for all of the COs. The joint and several obligation is mandated by the FHLBank Act and FHFA regulations and is not the result of an arms-length transaction among the FHLBanks. The FHLBanks have no control over the amount of the guaranty or the determination of how each FHLBank would perform under the joint and several obligation. Because the FHLBanks are subject to the authority of the FHFA as it relates to decisions involving the allocation of the joint and several liability for the FHLBanks' COs, the FHLBanks' joint and several obligation is excluded from the initial recognition and measurement provisions. Accordingly, we have not recognized a liability for our joint and several obligation related to other FHLBanks' COs at March 31, 2017, and December 31, 2016. The par amounts of other FHLBanks' outstanding COs for which we are jointly and severally liable totaled $907.1 billion and $932.1 billion at March 31, 2017, and December 31, 2016, respectively. See Note 13 — Consolidated Obligations for additional information.

Off-Balance-Sheet Commitments

The following table sets forth our off-balance-sheet commitments as of March 31, 2017, and December 31, 2016 (dollars in thousands):

	March 31, 2017						December 31, 2016
	Expire within one year		Expire after one year		Total		Expire within one year		Expire after one year		Total
Standby letters of credit outstanding (1)	$	4,472,318	$	174,997	$	4,647,315	$	4,050,447	$	179,632	$	4,230,079
Commitments for unused lines of credit - advances (2)	1,261,985		—		1,261,985		1,255,140		—		1,255,140
Commitments to make additional advances	33,928		73,193		107,121		44,865		65,972		110,837
Commitments to invest in mortgage loans	37,827		—		37,827		22,524		—		22,524
Unsettled CO bonds, at par	70,750		—		70,750		—		—		—

__________________________

(1) The amount of standby letters of credit outstanding excludes commitments to issue standby letters of credit that expire within one year. At March 31, 2017, and December 31, 2016, these amounts totaled $44.1 million and $2.7 million, respectively. Also excluded are commitments to issue standby letters of credit that expire after one year totaling $285,000 at December 31, 2016.

(2) Commitments for unused line-of-credit advances are generally for periods of up to 12 months. Since many of these commitments are not expected to be drawn upon, the total commitment amount does not necessarily indicate future liquidity requirements.

Standby Letters of Credit.A standby letter of credit is a financing arrangement pursuant to which we agree for a fee to fund the associated obligation to a third-party beneficiary should the primary obligor fail to fund such obligation. If we are required to make payment for a beneficiary's draw, our strategy is to take prompt action to recover the funds paid to the third-party beneficiary, including converting the payment amount into a collateralized advance to the primary obligor, withdrawing the payment amount from the primary obligor's demand deposit account with us, or selling collateral pledged by the primary obligor in a commercially reasonable manner to offset the payment amount. The original terms of these standby letters of credit have original expiration periods of up to 20 years, currently expiring no later than 2026. Our unearned fees for the value of the guarantees related to standby letters of credit are recorded in other liabilities and totaled $1.0 million and $1.1 million at March 31, 2017, and December 31, 2016, respectively.

Commitments to Invest in Mortgage Loans. Commitments to invest in mortgage loans are generally for periods not to exceed 45 business days. Such commitments are recorded as derivatives at their fair values on the statement of condition.

Pledged Collateral. We have pledged securities, as collateral, related to derivatives. See Note 11 — Derivatives and Hedging Activities for additional information about our pledged collateral and other credit-risk-related contingent features.

Legal Proceedings. We are subject to various legal proceedings arising in the normal course of business from time to time. We would record an accrual for a loss contingency when it is probable that a loss has been incurred and the amount can be reasonably estimated. Management does not anticipate that the ultimate liability, if any, arising out of these matters will have a material effect on our financial condition, results of operations, or cash flows.

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Transactions with Shareholders

3 Months Ended

Mar. 31, 2017

Transactions with Shareholders [Abstract]

Transactions with Shareholders [Text Block]

Transactions with Shareholders

Shareholder Concentrations. We consider shareholder concentrations as members or nonmembers whose capital stock holdings (including mandatorily redeemable capital stock) are in excess of 10 percent of total capital stock outstanding. The following tables present transactions with shareholders whose holdings of capital stock exceed 10 percent or more of total capital stock outstanding at March 31, 2017, and December 31, 2016 (dollars in thousands):

	Capital Stock Outstanding		Percent of Total		Par Value of Advances		Percent of Total Par Value of Advances		Total Accrued Interest Receivable		Percent of Total Accrued Interest Receivable on Advances
As of March 31, 2017
Citizens Bank, N.A.	$	352,223	14.1	%	$	5,260,581	14.8	%	$	2,345	6.2	%
As of December 31, 2016
Citizens Bank, N.A.	$	357,508	14.6	%	$	7,260,446	18.6	%	$	2,625	7.3	%

We held sufficient collateral to support the advances to the above institution such that we do not expect to incur any credit losses on these advances.

We recognized interest income on outstanding advances and fees on letters of credit from Citizens Bank, N.A. during the three months endedMarch 31, 2017 and 2016, as follows (dollars in thousands):

	For the Three Months Ended March 31,
Citizens Bank, N.A.	2017		2016
Interest income on advances	$	14,111	$	8,204
Fees on letters of credit	745		840

Transactions with Directors' Institutions. We provide, in the ordinary course of business, products and services to members whose officers or directors serve on our board of directors. In accordance with FHFA regulations, transactions with directors' institutions are conducted on the same terms as those with any other member.

The following table presents the outstanding balances of capital stock, advances, and accrued interest receivable with members whose officers or directors serve on our board of directors, and those balances as a percentage of our total balance as reported on our statement of condition (dollars in thousands):

	Capital Stock Outstanding		Percent of Total		Par Value of Advances		Percent of Total Par Value of Advances		Total Accrued Interest Receivable		Percent of Total Accrued Interest Receivable on Advances
As of March 31, 2017	$	82,433	3.3	%	$	1,319,925	3.7	%	$	1,564	4.2	%
As of December 31, 2016	91,374		3.7		1,554,753		4.0		1,631		4.5

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Subsequent Events Subsequent Events

3 Months Ended

Mar. 31, 2017

Subsequent Events [Abstract]

Subsequent Events [Text Block]

Subsequent Events

On April 3, 2017, we conducted a partial repurchase of excess capital stock under the Excess Stock Management Program in the amount of $180.2 million.

On April 18, 2017, the board of directors declared a cash dividend at an annualized rate of 4.08 percent based on capital stock balances outstanding during the first quarter of 2017. The dividend, including dividends on mandatorily redeemable capital stock, amounted to $25.2 million and was paid on May 2, 2017.

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Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2017

Accounting Policies [Abstract]

Investment, Policy

We evaluate our individual available-for-sale and held-to-maturity securities for other-than-temporary impairment each quarter.

Derivatives, Policy

We utilize two derivatives clearing organizations (DCOs), for all cleared derivative transactions, LCH.Clearnet LLC and CME Clearing. Effective January 3, 2017, CME Clearing made certain amendments to its rulebook changing the legal characterization of variation margin payments to be daily settlement payments, rather than collateral transfers. We continue to characterize our variation margin related at LCH.Clearnet LLC contracts as cash collateral. At both DCOs, initial margin is considered cash collateral.

We enter into derivatives that we clear (cleared derivatives) with a DCO, our counterparty for such derivatives. We also enter into derivatives that are not cleared (uncleared derivatives) under master-netting agreements.

Fair Value of Financial Instruments, Policy

We measure certain held-to-maturity investment securities, mortgage loans held for portfolio, and real-estate-owned property (REO) at fair value on a nonrecurring basis, that is, they are not measured at fair value on an ongoing basis but are subject to fair-value adjustments only in certain circumstances (for example, upon recognizing an other-than-temporary impairment on a held-to-maturity security).

Joint and Several Liability, Policy

We evaluate the financial condition of the other FHLBanks primarily based on known regulatory actions, publicly available financial information, and individual long-term credit-rating action as of each period-end presented.

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Trading Securities (Tables)

3 Months Ended

Mar. 31, 2017

Trading Securities [Abstract]

Trading Securities by Major Security Type [Table Text Block]

Our trading securities as of March 31, 2017, and December 31, 2016, were (dollars in thousands):

	March 31, 2017		December 31, 2016
U.S. Treasury obligations	$	308,698	$	399,521
Mortgage backed securities (MBS)
U.S. government-guaranteed – single-family	8,050		8,494
GSEs – single-family	644		768
GSEs – multifamily	198,758		203,839
	207,452		213,101
Total	$	516,150	$	612,622

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Available-for-Sale Securities (Tables)

3 Months Ended

Mar. 31, 2017

Schedule of Available-for-sale Securities [Line Items]

Available-for-Sale (AFS) Securities by Major Security Type [Table Text Block]

Our available-for-sale securities as of March 31, 2017, were (dollars in thousands):

			Amounts Recorded in Accumulated Other Comprehensive Loss
	Amortized Cost (1)		Unrealized Gains		Unrealized Losses			Fair  Value
State or local housing-finance-agency obligations (HFA securities)	$	9,350	$	—	$	(1,166	)	$	8,184
Supranational institutions	447,485		—		(25,146		)	422,339
U.S. government-owned corporations	313,779		—		(37,163		)	276,616
GSEs	129,336		—		(10,992		)	118,344
	899,950		—		(74,467		)	825,483
MBS
U.S. government guaranteed – single-family	119,919		62		(2,303		)	117,678
U.S. government guaranteed – multifamily	512,927		—		(2,795		)	510,132
GSEs – single-family	4,208,100		3,950		(36,542		)	4,175,508
GSEs – multifamily	668,808		2,192		—			671,000
	5,509,754		6,204		(41,640		)	5,474,318
Total	$	6,409,704	$	6,204	$	(116,107	)	$	6,299,801

_______________________

(1) Amortized cost of available-for-sale securities includes adjustments made to the cost basis of an investment for accretion, amortization, collection of cash, and fair-value hedge accounting adjustments.

Our available-for-sale securities as of December 31, 2016, were (dollars in thousands):

			Amounts Recorded in Accumulated Other Comprehensive Loss
	Amortized Cost (1)		Unrealized Gains		Unrealized Losses			Fair  Value
HFA securities	$	9,350	$	—	$	(1,204	)	$	8,146
Supranational institutions	452,021		—		(29,401		)	422,620
U.S. government-owned corporations	317,588		—		(45,631		)	271,957
GSEs	130,798		—		(13,330		)	117,468
	909,757		—		(89,566		)	820,191
MBS
U.S. government guaranteed – single-family	127,032		16		(2,321		)	124,727
U.S. government guaranteed – multifamily	565,593		45		(2,277		)	563,361
GSEs – single-family	4,447,803		1,765		(45,713		)	4,403,855
GSEs – multifamily	675,288		1,242		—			676,530
	5,815,716		3,068		(50,311		)	5,768,473
Total	$	6,725,473	$	3,068	$	(139,877	)	$	6,588,664

_______________________

(1) Amortized cost of available-for-sale securities includes adjustments made to the cost basis of an investment for accretion, amortization, collection of cash, and fair-value hedge accounting adjustments.

Categories of Investments, Marketable Securities, Available-for-Sale Securities [Member]

Schedule of Available-for-sale Securities [Line Items]

AFS Securities in a Continuous Unrealized Loss Position [Table Text Block]

The following table summarizes our available-for-sale securities with unrealized losses as of March 31, 2017, which are aggregated by major security type and length of time that individual securities have been in a continuous unrealized loss position (dollars in thousands):

	Less than 12 Months					12 Months or More					Total
	Fair  Value		Unrealized  Losses			Fair  Value		Unrealized  Losses			Fair  Value		Unrealized  Losses
HFA securities	$	8,184	$	(1,166	)	$	—	$	—		$	8,184	$	(1,166	)
Supranational institutions	—		—			422,339		(25,146		)	422,339		(25,146		)
U.S. government-owned corporations	—		—			276,616		(37,163		)	276,616		(37,163		)
GSEs	—		—			118,344		(10,992		)	118,344		(10,992		)
	8,184		(1,166		)	817,299		(73,301		)	825,483		(74,467		)
MBS
U.S. government guaranteed – single-family	—		—			86,435		(2,303		)	86,435		(2,303		)
U.S. government guaranteed – multifamily	364,121		(1,760		)	146,011		(1,035		)	510,132		(2,795		)
GSEs – single-family	3,017,265		(30,967		)	327,482		(5,575		)	3,344,747		(36,542		)
	3,381,386		(32,727		)	559,928		(8,913		)	3,941,314		(41,640		)
Total temporarily impaired	$	3,389,570	$	(33,893	)	$	1,377,227	$	(82,214	)	$	4,766,797	$	(116,107	)

The following table summarizes our available-for-sale securities with unrealized losses as of December 31, 2016, which are aggregated by major security type and length of time that individual securities have been in a continuous unrealized loss position (dollars in thousands):

	Less than 12 Months					12 Months or More					Total
	Fair  Value		Unrealized  Losses			Fair  Value		Unrealized  Losses			Fair  Value		Unrealized  Losses
HFA securities	$	8,146	$	(1,204	)	$	—	$	—		$	8,146	$	(1,204	)
Supranational institutions	—		—			422,620		(29,401		)	422,620		(29,401		)
U.S. government-owned corporations	—		—			271,957		(45,631		)	271,957		(45,631		)
GSEs	—		—			117,468		(13,330		)	117,468		(13,330		)
	8,146		(1,204		)	812,045		(88,362		)	820,191		(89,566		)
MBS
U.S. government guaranteed – single-family	31,606		(4		)	90,854		(2,317		)	122,460		(2,321		)
U.S. government guaranteed – multifamily	326,126		(1,261		)	165,246		(1,016		)	491,372		(2,277		)
GSEs – single-family	3,517,094		(39,181		)	351,331		(6,532		)	3,868,425		(45,713		)
	3,874,826		(40,446		)	607,431		(9,865		)	4,482,257		(50,311		)
Total temporarily impaired	$	3,882,972	$	(41,650	)	$	1,419,476	$	(98,227	)	$	5,302,448	$	(139,877	)

Investments Classified by Contractual Maturity Date [Table Text Block]

The amortized cost and fair value of our available-for-sale securities by contractual maturity at March 31, 2017, and December 31, 2016, were (dollars in thousands):

	March 31, 2017				December 31, 2016
Year of Maturity	Amortized Cost		Fair  Value		Amortized Cost		Fair  Value
Due in one year or less	$	—	$	—	$	—	$	—
Due after one year through five years	9,350		8,184		9,350		8,146
Due after five years through 10 years	169,829		160,476		171,589		161,746
Due after 10 years	720,771		656,823		728,818		650,299
	899,950		825,483		909,757		820,191
MBS (1)	5,509,754		5,474,318		5,815,716		5,768,473
Total	$	6,409,704	$	6,299,801	$	6,725,473	$	6,588,664

_______________________

(1) MBS are not presented by contractual maturity because their expected maturities will likely differ from contractual maturities because borrowers of the underlying loans may have the right to call or prepay obligations with or without call or prepayment fees.

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Held-to-Maturity Securities (Tables)

3 Months Ended

Mar. 31, 2017

Schedule of Held-to-maturity Securities [Line Items]

HTM Securities by Major Security Type [Table Text Block]

Our held-to-maturity securities as of March 31, 2017, were (dollars in thousands):

	Amortized Cost		Other-Than-Temporary Impairment Recognized in Accumulated Other Comprehensive Loss			Carrying Value		Gross Unrecognized Holding Gains		Gross Unrecognized Holding Losses			Fair Value
U.S. agency obligations	$	1,922	$	—		$	1,922	$	41	$	—		$	1,963
HFA securities	161,289		—			161,289		11		(17,212		)	144,088
	163,211		—			163,211		52		(17,212		)	146,051
MBS
U.S. government guaranteed – single-family	12,073		—			12,073		243		—			12,316
U.S. government guaranteed – multifamily	1,489		—			1,489		—		(3		)	1,486
GSEs – single-family	744,548		—			744,548		15,430		(455		)	759,523
GSEs – multifamily	296,207		—			296,207		10,735		—			306,942
Private-label – residential	957,620		(183,165		)	774,455		243,699		(7,609		)	1,010,545
Asset-backed securities (ABS) backed by home equity loans	13,080		(552		)	12,528		554		(508		)	12,574
	2,025,017		(183,717		)	1,841,300		270,661		(8,575		)	2,103,386
Total	$	2,188,228	$	(183,717	)	$	2,004,511	$	270,713	$	(25,787	)	$	2,249,437

Our held-to-maturity securities as of December 31, 2016, were (dollars in thousands):

	Amortized Cost		Other-Than-Temporary Impairment Recognized in Accumulated Other Comprehensive Loss			Carrying Value		Gross Unrecognized Holding Gains		Gross Unrecognized Holding Losses			Fair Value
U.S. agency obligations	$	2,159	$	—		$	2,159	$	56	$	—		$	2,215
HFA securities	162,568		—			162,568		11		(19,291		)	143,288
	164,727		—			164,727		67		(19,291		)	145,503
MBS
U.S. government guaranteed – single-family	12,719		—			12,719		246		—			12,965
U.S. government guaranteed – multifamily	1,532		—			1,532		—		—			1,532
GSEs – single-family	812,836		—			812,836		16,881		(519		)	829,198
GSEs – multifamily	318,667		—			318,667		11,692		—			330,359
Private-label – residential	999,149		(191,804		)	807,345		240,818		(8,373		)	1,039,790
ABS backed by home equity loans	13,515		(574		)	12,941		602		(600		)	12,943
	2,158,418		(192,378		)	1,966,040		270,239		(9,492		)	2,226,787
Total	$	2,323,145	$	(192,378	)	$	2,130,767	$	270,306	$	(28,783	)	$	2,372,290

Categories of Investments, Marketable Securities, Held-to-maturity Securities [Member]

Schedule of Held-to-maturity Securities [Line Items]

HTM Securities in a Continuous Unrealized Loss Position [Table Text Block]

The following table summarizes our held-to-maturity securities with unrealized losses as of March 31, 2017, which are aggregated by major security type and length of time that individual securities have been in a continuous unrealized loss position (dollars in thousands).

	Less than 12 Months					12 Months or More					Total
	Fair Value		Unrealized Losses			Fair  Value		Unrealized Losses			Fair Value		Unrealized Losses
HFA securities	$	—	$	—		$	141,759	$	(17,212	)	$	141,759	$	(17,212	)
MBS
U.S. government guaranteed - multifamily	1,486		(3		)	—		—			1,486		(3		)
GSEs – single-family	21,376		(331		)	23,144		(124		)	44,520		(455		)
Private-label – residential	14,825		(115		)	326,790		(23,148		)	341,615		(23,263		)
ABS backed by home equity loans	—		—			11,584		(656		)	11,584		(656		)
	37,687		(449		)	361,518		(23,928		)	399,205		(24,377		)
Total	$	37,687	$	(449	)	$	503,277	$	(41,140	)	$	540,964	$	(41,589	)

The following table summarizes our held-to-maturity securities with unrealized losses as of December 31, 2016, which are aggregated by major security type and length of time that individual securities have been in a continuous unrealized loss position (dollars in thousands).

	Less than 12 Months					12 Months or More					Total
	Fair Value		Unrealized Losses			Fair  Value		Unrealized Losses			Fair Value		Unrealized Losses
HFA securities	$	—	$	—		$	140,959	$	(19,291	)	$	140,959	$	(19,291	)
MBS
GSEs – single-family	83,291		(393		)	13,405		(126		)	96,696		(519		)
Private-label – residential	16,915		(128		)	397,407		(28,781		)	414,322		(28,909		)
ABS backed by home equity loans	—		—			11,898		(720		)	11,898		(720		)
	100,206		(521		)	422,710		(29,627		)	522,916		(30,148		)
Total	$	100,206	$	(521	)	$	563,669	$	(48,918	)	$	663,875	$	(49,439	)

HTM Securities by Contractual Maturity [Table Text Block]

The amortized cost, carrying value, and fair value of our held-to-maturity securities by contractual maturity at March 31, 2017, and December 31, 2016, are shown below (dollars in thousands). Expected maturities of some securities and MBS may differ from contractual maturities because borrowers of the underlying loans may have the right to call or prepay their obligations with or without call or prepayment fees.

	March 31, 2017						December 31, 2016
Year of Maturity	Amortized Cost		Carrying Value (1)		Fair Value		Amortized Cost		Carrying Value (1)		Fair Value
Due in one year or less	$	—	$	—	$	—	$	—	$	—	$	—
Due after one year through five years	16,401		16,401		16,446		16,637		16,637		16,663
Due after five years through 10 years	—		—		—		—		—		—
Due after 10 years	146,810		146,810		129,605		148,090		148,090		128,840
	163,211		163,211		146,051		164,727		164,727		145,503
MBS (2)	2,025,017		1,841,300		2,103,386		2,158,418		1,966,040		2,226,787
Total	$	2,188,228	$	2,004,511	$	2,249,437	$	2,323,145	$	2,130,767	$	2,372,290

_______________________

(1) Carrying value of held-to-maturity securities represents the sum of amortized cost and the amount of noncredit-related other-than-temporary impairment recognized in accumulated other comprehensive loss.

(2) MBS are not presented by contractual maturity because their expected maturities will likely differ from contractual maturities because borrowers of the underlying loans may have the right to call or prepay their obligations with or without call or prepayment fees.

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Other-Than-Temporary Impairment (Tables)

3 Months Ended

Mar. 31, 2017

Other than Temporary Impairment Losses, Investments [Abstract]

Significant Inputs for OTTI [Table Text Block]

For those securities for which a credit loss was recognized during the three months endedMarch 31, 2017, the following table presents a summary of the average projected values over the remaining lives of the securities for the significant inputs used to measure the amount of the credit loss recognized in earnings, as well as related current credit enhancement. Credit enhancement is defined as the percentage of subordinated tranches, over-collateralization, and other credit enhancement, if any, in a security structure that will generally absorb losses before we will experience a credit loss on the security. The calculated averages represent the dollar-weighted average of Alt-A other-than-temporarily impaired private-label residential MBS (dollars in thousands).

			Weighted Average of Significant Inputs						Weighted Average Current Credit Enhancement
Private-label MBS by Classification	Par Value		Projected Prepayment Rates		Projected Default Rates		Projected Loss Severities
Alt-A - Private-label residential MBS (1)	$	46,262	7.7	%	31.7	%	37.6	%	4.4	%

_______________________

(1) Securities are classified based upon the current performance characteristics of the underlying loan pool and therefore the manner in which the loan pool backing the security has been modeled (as prime, Alt-A, or subprime), rather than their classification of the security at the time of issuance.

Total Securities Other-than-Temporarily Impaired during the Life of the Security [Table Text Block]

The following table sets forth our securities for which other-than-temporary impairment credit losses were recognized during the life of the security through March 31, 2017 (dollars in thousands). Securities are classified in the table below based on their classifications at the time of issuance.

	March 31, 2017
Other-Than-Temporarily Impaired Investment (1)	Par Value		Amortized Cost		Carrying Value		Fair Value
Private-label residential MBS – Prime	$	37,589	$	32,394	$	25,666	$	33,369
Private-label residential MBS – Alt-A	1,062,245		786,567		610,130		846,087
ABS backed by home equity loans – Subprime	3,670		3,359		2,808		3,362
Total other-than-temporarily impaired securities	$	1,103,504	$	822,320	$	638,604	$	882,818

_______________________

(1) We have instituted litigation related to certain of the private-label MBS in which we invested. Our complaint asserts, among others, claims for untrue or misleading statements in the sale of securities. It is possible that classifications of private-label MBS as provided herein when based on classification at the time of issuance as disclosed by those securities' issuance documents, as well as other statements about the securities, are inaccurate.

Rollforward of the Amounts Related to Credit Losses Recognized into Earnings [Table Text Block]

The following table presents a roll-forward of the amounts related to credit losses recognized in earnings. The roll-forward is the amount of credit losses on investment securities for which we recognized a portion of other-than-temporary impairment charges into accumulated other comprehensive loss (dollars in thousands).

	For the Three Months Ended March 31,
	2017			2016
Balance at beginning of period	$	490,404		$	533,888
Additions:
Additional credit losses for which an other-than-temporary impairment charge was previously recognized(1)	418			1,347
Reductions:
Increase in cash flows expected to be collected which are recognized over the remaining life of the security(2)	(8,601		)	(9,426		)
Balance at end of period	$	482,221		$	525,809

_______________________

(1) For the three monthsMarch 31, 2017 and 2016, additional credit losses for which an other-than-temporary impairment charge was previously recognized relate to securities that were also previously impaired prior to January 1, 2017 and 2016, respectively.

(2) Represents amounts accreted as interest income during the current period.

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Advances (Tables)

3 Months Ended

Mar. 31, 2017

Advances [Abstract]

Advances [Table Text Block]

The following table sets forth our advances outstanding by the year of contractual maturity or next call date for callable advances (dollars in thousands):

Year of Contractual Maturity or Next Call Date (1), Par Value	March 31, 2017		December 31, 2016
Overdrawn demand-deposit accounts	$	7,935	$	3,780
Due in one year or less	23,108,797		26,447,977
Due after one year through two years	3,410,994		3,693,780
Due after two years through three years	2,821,139		2,508,459
Due after three years through four years	1,826,318		2,002,232
Due after four years through five years	1,739,679		1,891,269
Thereafter	2,605,148		2,567,358
Total par value	$	35,520,010	$	39,114,855

_______________________

(1) Also includes certain floating-rate advances that may be contractually prepaid by the borrower on a floating-rate reset date without incurring prepayment or termination fees

The following table details interest-rate-payment types for our outstanding advances (dollars in thousands):

Par value of advances	March 31, 2017		December 31, 2016
Fixed-rate	$	28,953,692	$	30,526,192
Variable-rate	6,566,318		8,588,663
Total par value	$	35,520,010	$	39,114,855

At both March 31, 2017, and December 31, 2016, we had advances outstanding with interest rates ranging from zero percent to 7.72 percent as summarized below (dollars in thousands).

	March 31, 2017					December 31, 2016
Year of Contractual Maturity	Amount			Weighted Average Rate		Amount			Weighted Average Rate
Overdrawn demand-deposit accounts	$	7,935		1.21	%	$	3,780		0.92	%
Due in one year or less	17,444,622			1.22		18,783,802			1.05
Due after one year through two years	8,673,994			1.31		10,966,780			1.15
Due after two years through three years	2,821,139			1.72		2,508,459			1.67
Due after three years through four years	2,011,518			1.74		2,177,432			1.64
Due after four years through five years	1,889,679			1.86		2,041,269			1.80
Thereafter	2,671,123			1.63		2,633,333			1.70
Total par value	35,520,010			1.38	%	39,114,855			1.23	%
Premiums	21,143					22,633
Discounts	(28,551		)			(25,847		)
Fair value of bifurcated derivatives (1)	(576		)			(153		)
Hedging adjustments	(32,602		)			(12,149		)
Total	$	35,479,424				$	39,099,339

_________________________

(1) At March 31, 2017, and December 31, 2016, we had certain advances with embedded features that met the requirements to be separated from the host contract and designated as stand-alone derivatives.

The following table sets forth our advances outstanding by the year of contractual maturity or next put date for putable advances (dollars in thousands):

Year of Contractual Maturity or Next Put Date, Par Value	March 31, 2017		December 31, 2016
Overdrawn demand-deposit accounts	$	7,935	$	3,780
Due in one year or less	19,278,622		20,788,552
Due after one year through two years	8,991,244		10,946,530
Due after two years through three years	2,723,139		2,455,709
Due after three years through four years	1,842,518		1,974,932
Due after four years through five years	1,594,179		1,736,769
Thereafter	1,082,373		1,208,583
Total par value	$	35,520,010	$	39,114,855

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Mortgage Loans Held for Portfolio (Tables)

3 Months Ended

Mar. 31, 2017

Mortgage Loans on Real Estate [Abstract]

Mortgage Loans Held for Portfolio [Table Text Block]

The following table presents certain characteristics of these investments (dollars in thousands):

	March 31, 2017			December 31, 2016
Real estate
Fixed-rate 15-year single-family mortgages	$	509,001		$	528,486
Fixed-rate 20- and 30-year single-family mortgages	3,100,731			3,098,476
Premiums	66,437			67,523
Discounts	(1,681		)	(1,696		)
Deferred derivative gains, net	1,735			1,755
Total mortgage loans held for portfolio	3,676,223			3,694,544
Less: allowance for credit losses	(625		)	(650		)
Total mortgage loans, net of allowance for credit losses	$	3,675,598		$	3,693,894

The following table details the par value of mortgage loans held for portfolio (dollars in thousands):

	March 31, 2017		December 31, 2016
Conventional mortgage loans	$	3,228,586	$	3,235,835
Government mortgage loans	381,146		391,127
Total par value	$	3,609,732	$	3,626,962

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Allowance for Credit Losses (Tables)

3 Months Ended

Mar. 31, 2017

Receivables [Abstract]

Recorded Investment in Delinquent Mortgage Loans [Table Text Block]

The tables below set forth certain key credit quality indicators for our investments in mortgage loans at March 31, 2017, and December 31, 2016 (dollars in thousands):

	March 31, 2017
	Recorded Investment in Conventional Mortgage Loans			Recorded Investment in Government Mortgage Loans			Total
Past due 30-59 days delinquent	$	27,972		$	14,051		$	42,023
Past due 60-89 days delinquent	7,066			3,647			10,713
Past due 90 days or more delinquent	14,464			5,093			19,557
Total past due	49,502			22,791			72,293
Total current loans	3,253,714			368,795			3,622,509
Total mortgage loans	$	3,303,216		$	391,586		$	3,694,802
Other delinquency statistics
In process of foreclosure, included above (1)	$	7,193		$	1,003		$	8,196
Serious delinquency rate (2)	0.46		%	1.30		%	0.55		%
Past due 90 days or more still accruing interest	$	—		$	5,093		$	5,093
Loans on nonaccrual status (3)	$	14,753		$	—		$	14,753

_______________________

(1) Includes loans where the decision of foreclosure or similar alternative such as pursuit of deed-in-lieu of foreclosure has been reported.

(2) Loans that are 90 days or more past due or in the process of foreclosure expressed as a percentage of the recorded investment in the total loan portfolio class.

(3) Includes conventional mortgage loans with contractual principal or interest payments 90 days or more past due and not accruing interest as well as loans modified within the previous six months under our temporary loan modification plan.

	December 31, 2016
	Recorded Investment in Conventional Mortgage Loans			Recorded Investment in Government Mortgage Loans			Total
Past due 30-59 days delinquent	$	26,757		$	14,878		$	41,635
Past due 60-89 days delinquent	5,508			3,846			9,354
Past due 90 days or more delinquent	16,379			5,807			22,186
Total past due	48,644			24,531			73,175
Total current loans	3,262,671			377,438			3,640,109
Total mortgage loans	$	3,311,315		$	401,969		$	3,713,284
Other delinquency statistics
In process of foreclosure, included above (1)	$	7,495		$	1,502		$	8,997
Serious delinquency rate (2)	0.53		%	1.44		%	0.63		%
Past due 90 days or more still accruing interest	$	—		$	5,807		$	5,807
Loans on nonaccrual status (3)	$	16,940		$	—		$	16,940

_______________________

(1) Includes loans where the decision of foreclosure or similar alternative such as pursuit of deed-in-lieu of foreclosure has been reported.

(2) Loans that are 90 days or more past due or in the process of foreclosure expressed as a percentage of the recorded investment in the total loan portfolio class.

(3) Includes conventional mortgage loans with contractual principal or interest payments 90 days or more past due and not accruing interest as well as loans modified within the previous six months under our temporary loan modification plan.

Individually Evaluated Impaired Loans, Recorded Investment [Table Text Block]

The following tables present the recorded investment, par value and any related allowance for impaired loans individually assessed for impairment at March 31, 2017, and December 31, 2016, and the average recorded investment and interest income recognized on these loans during the three months ended March 31, 2017 and 2016 (dollars in thousands).

	As of March 31, 2017				As of December 31, 2016
	Recorded Investment		Par Value		Recorded Investment		Par Value
Individually evaluated impaired mortgage loans with no related allowance	$	21,352	$	21,311	$	22,945	$	22,905

Individually Evaluated Impaired Loans, Average Recorded Investment and Interest Income Recognized [Table Text Block]

	For the Three Months Ended March 31,
	2017				2016
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
Individually evaluated impaired mortgage loans with no related allowance	$	21,699	$	116	$	25,841	$	80

Rollforward of Allowance for Credit Losses on Mortgage Loans [Table Text Block]

The following table presents a roll-forward of the allowance for credit losses on conventional mortgage loans for the three months ended March 31, 2017 and 2016, as well as the recorded investment in mortgage loans by impairment methodology at March 31, 2017 and 2016 (dollars in thousands). The recorded investment in a loan is the par amount of the loan, adjusted for accrued interest, unamortized premiums or discounts, deferred derivative gains and losses, and direct write-downs. The recorded investment is net of any valuation allowance.

	For the Three Months Ended March 31,
	2017			2016
Allowance for credit losses
Balance, beginning of period	$	650		$	1,025
Recoveries (charge-offs)	26			(11		)
(Reduction of) provision for credit losses	(51		)	11
Balance, end of period	$	625		$	1,025
Ending balance, individually evaluated for impairment	$	—		$	—
Ending balance, collectively evaluated for impairment	$	625		$	1,025
Recorded investment, end of period (1)
Individually evaluated for impairment	$	21,352		$	25,316
Collectively evaluated for impairment	$	3,281,864		$	3,151,522

_________________________

(1) These amounts exclude government mortgage loans because we make no allowance for credit losses based on our investments in government mortgage loans, as discussed above under — Government Mortgage Loans Held for Portfolio.

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Derivatives and Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Fair Value of Derivative Instruments [Table Text Block]

The following table presents the notional amount and fair value of derivatives (excluding fair value adjustments related to variation margin for daily settled contracts) and total derivatives assets and liabilities. Total derivative asset and liabilities include the effect of netting adjustments, cash collateral, and variation margin for daily settled contracts as of March 31, 2017, and December 31, 2016 (dollars in thousands):

	March 31, 2017								December 31, 2016
	Notional Amount of Derivatives		Derivative Assets			Derivative Liabilities			Notional Amount of Derivatives		Derivative Assets		Derivative Liabilities
Derivatives designated as hedging instruments
Interest-rate swaps	$	17,424,429	$	58,357		$	(375,167	)	$	18,215,809	$	52,715	$	(413,026	)
Forward-start interest-rate swaps	527,800		—			(36,253		)	527,800		—		(36,250		)
Total derivatives designated as hedging instruments	17,952,229		58,357			(411,420		)	18,743,609		52,715		(449,276		)
Derivatives not designated as hedging instruments
Economic hedges:
Interest-rate swaps	1,099,500		1,995			(9,011		)	1,199,000		2,293		(10,840		)
Mortgage-delivery commitments (1)	37,827		202			(9		)	22,524		70		(171		)
Total derivatives not designated as hedging instruments	1,137,327		2,197			(9,020		)	1,221,524		2,363		(11,011		)
Total notional amount of derivatives	$	19,089,556							$	19,965,133
Total derivatives before netting and collateral adjustments			60,554			(420,440		)			55,078		(460,287		)
Netting adjustments, cash collateral, and variation margin for daily settled contracts including related accrued interest (2)			(7,861		)	95,357					6,520		102,411
Derivative assets and derivative liabilities			$	52,693		$	(325,083	)			$	61,598	$	(357,876	)

_______________________

(1) Mortgage-delivery commitments are classified as derivatives with changes in fair value recorded in other income.

(2) Amounts represent the effect of master-netting agreements intended to allow us to settle positive and negative positions with the same counterparty. Cash collateral and related accrued interest posted was $57.7 million and $109.8 million at March 31, 2017, and December 31, 2016, respectively. The change in cash collateral posted is included in the net change in interest-bearing deposits in the statement of cash flows. Cash collateral and related accrued interest received was $851,000 and $850,000 at March 31, 2017, and December 31, 2016, respectively. Variation margin for daily settled contracts was $30.6 million at March 31, 2017.

Net Gains (Losses) on Derivatives and Hedging Activities [Table Text Block]

Net (losses) gains on derivatives and hedging activities recorded in Other Income (Loss) for the three months endedMarch 31, 2017 and 2016, were as follows (dollars in thousands):

	For the Three Months Ended March 31,
	2017			2016
Derivatives designated as hedging instruments
Interest-rate swaps	$	(659	)	$	(3,033	)
Forward-start interest-rate swaps	134			(346		)
Total net losses related to derivatives designated as hedging instruments	(525		)	(3,379		)
Derivatives not designated as hedging instruments:
Economic hedges:
Interest-rate swaps	153			(3,472		)
Mortgage-delivery commitments	357			616
Total net gains (losses) related to derivatives not designated as hedging instruments	510			(2,856		)
Other(1)	51			—
Net gains (losses) on derivatives and hedging activities	$	36		$	(6,235	)

______________

(1) Consists of price alignment amount on derivatives for which variation margin is characterized as a daily settlement amount.

Gains (Losses) By Type of Hedged Item [Table Text Block]

The following tables present, by type of hedged item, the gains (losses) on derivatives and the related hedged items in fair-value hedge relationships and the impact of those derivatives on our net interest income for the three months endedMarch 31, 2017 and 2016 (dollars in thousands):

	For the Three Months Ended March 31, 2017
	Gain/(Loss) on Derivative		Gain/(Loss) on Hedged Item			Net Fair-Value Hedge Ineffectiveness			Effect of Derivatives on Net Interest Income (1)
Hedged Item:
Advances	$	21,095	$	(20,453	)	$	642		$	(13,405	)
Investments	10,268		(9,808		)	460			(8,341		)
COs – bonds	76		(1,837		)	(1,761		)	4,641
Total	$	31,439	$	(32,098	)	$	(659	)	$	(17,105	)

	For the Three Months Ended March 31, 2016
	Gain/(Loss) on Derivative			Gain/(Loss) on Hedged Item			Net Fair-Value Hedge Ineffectiveness			Effect of Derivatives on Net Interest Income (1)
Hedged Item:
Advances	$	(68,456	)	$	68,233		$	(223	)	$	(30,124	)
Investments	(49,455		)	49,839			384			(9,011		)
COs – bonds	10,267			(13,461		)	(3,194		)	8,072
Total	$	(107,644	)	$	104,611		$	(3,033	)	$	(31,063	)

______________

(1) The net interest on derivatives in fair-value hedge relationships is presented in the statement of operations as interest income or interest expense of the respective hedged item.

Effect of Cash Flow Hedge-Related Derivative Instruments [Table Text Block]

The following table presents the losses recognized in accumulated other comprehensive loss, the losses reclassified from accumulated other comprehensive loss into income, and the effect of our hedging activities on our net losses on derivatives and hedging activities in the statement of income for our forward-start interest-rate swaps associated with hedged CO bonds in cash-flow hedge relationships (dollars in thousands).

Derivatives and Hedged Items in Cash Flow Hedging Relationships	Losses Recognized in Other Comprehensive Loss on Derivatives (Effective Portion)			Location of Losses Reclassified from Accumulated Other Comprehensive Loss into Net Income (Effective Portion)	Losses Reclassified from Accumulated Other Comprehensive Loss into Net Income (Effective Portion)			Gains (Losses) Recognized in Net Losses on Derivatives and Hedging Activities (Ineffective Portion)
Interest-rate swaps - CO bonds
For the Three Months Ended March 31, 2017	$	(138	)	Interest expense	$	(4,315	)	$	134
For the Three Months Ended March 31, 2016	(17,039		)	Interest expense	(7,208		)	(346		)

Post-haircut Value of Incremental Collateral Based on Incremental Credit Rating Downgrades [Table Text Block]

The following table sets forth the post-haircut value of incremental collateral that certain uncleared derivatives counterparties could have required us to deliver based on incremental credit rating downgrades at March 31, 2017.

Post Haircut Value of Incremental Collateral to be Delivered  as of March 31, 2017 (dollars in thousands)
Ratings Downgrade (1)
From	To	Incremental Collateral
AA+	AA or AA-	$	11,638
AA-	A+, A or A-	12,399
A-	below A-	16,808

_______________________

(1) Ratings are expressed in this table according to S&P's conventions but include the equivalent of such rating by Moody's. If there is a split rating, the lower rating is used.

Fair value of derivative assets instruments with and without the legal right of offset [Table Text Block]

The following table presents separately the fair value of derivatives that are subject to netting due to a legal right of offset based on the terms of our master netting arrangements or similar agreements as of March 31, 2017, and December 31, 2016 and the fair value of derivatives that are not subject to such netting (dollars in thousands). Such netting includes any related cash collateral received from or pledged to counterparties and variation margin for daily settled contracts.

	March 31, 2017						December 31, 2016
	Derivative Assets			Derivative Liabilities			Derivative Assets			Derivative Liabilities
Derivatives meeting netting requirements
Gross recognized amount
Uncleared derivatives	$	13,350		$	(367,754	)	$	12,594		$	(405,310	)
Cleared derivatives	47,002			(52,677		)	42,414			(54,806		)
Total gross recognized amount	60,352			(420,431		)	55,008			(460,116		)
Gross amounts of netting adjustments, cash collateral, and variation margin for daily settled contracts
Uncleared derivatives	(12,518		)	42,680			(12,028		)	47,605
Cleared derivatives	4,657			52,677			18,548			54,806
Total gross amounts of netting adjustments, cash collateral, and variation margin for daily settled contracts	(7,861		)	95,357			6,520			102,411
Net amounts after netting adjustments, cash collateral, and variation margin for daily settled contracts
Uncleared derivatives	832			(325,074		)	566			(357,705		)
Cleared derivatives	51,659			—			60,962			—
Total net amounts after netting adjustments, cash collateral, and variation margin for daily settled contracts	52,491			(325,074		)	61,528			(357,705		)
Derivatives not meeting netting requirements
Mortgage delivery commitments	202			(9		)	70			(171		)
Total derivative assets and total derivative liabilities
Uncleared derivatives	832			(325,074		)	566			(357,705		)
Cleared derivatives	51,659			—			60,962			—
Mortgage delivery commitments	202			(9		)	70			(171		)
Total derivative assets and total derivative liabilities presented in the statement of condition	52,693			(325,083		)	61,598			(357,876		)
Non-cash collateral received or pledged not offset (1)
Can be sold or repledged
Uncleared derivatives	—			21,063			—			30,306
Cannot be sold or repledged
Uncleared derivatives	—			278,113			—			290,444
Total non-cash collateral received or pledged, not offset	—			299,176			—			320,750
Net amount
Uncleared derivatives	832			(25,898		)	566			(36,955		)
Cleared derivatives	51,659			—			60,962			—
Mortgage delivery commitments	202			(9		)	70			(171		)
Total net amount	$	52,693		$	(25,907	)	$	61,598		$	(37,126	)

_______________________

(1) Includes non-cash collateral at fair value. Any overcollateralization with a counterparty is not included in the determination of the net amount. At March 31, 2017, and December 31, 2016, we had additional net credit exposure of $1.1 million and $2.0 million, respectively, due to instances where our collateral pledged to a counterparty exceeded our net derivative liability position.

Fair Value of derivative liabilities instruments with and without the legal right of offset [Table Text Block]

The following table presents separately the fair value of derivatives that are subject to netting due to a legal right of offset based on the terms of our master netting arrangements or similar agreements as of March 31, 2017, and December 31, 2016 and the fair value of derivatives that are not subject to such netting (dollars in thousands). Such netting includes any related cash collateral received from or pledged to counterparties and variation margin for daily settled contracts.

	March 31, 2017						December 31, 2016
	Derivative Assets			Derivative Liabilities			Derivative Assets			Derivative Liabilities
Derivatives meeting netting requirements
Gross recognized amount
Uncleared derivatives	$	13,350		$	(367,754	)	$	12,594		$	(405,310	)
Cleared derivatives	47,002			(52,677		)	42,414			(54,806		)
Total gross recognized amount	60,352			(420,431		)	55,008			(460,116		)
Gross amounts of netting adjustments, cash collateral, and variation margin for daily settled contracts
Uncleared derivatives	(12,518		)	42,680			(12,028		)	47,605
Cleared derivatives	4,657			52,677			18,548			54,806
Total gross amounts of netting adjustments, cash collateral, and variation margin for daily settled contracts	(7,861		)	95,357			6,520			102,411
Net amounts after netting adjustments, cash collateral, and variation margin for daily settled contracts
Uncleared derivatives	832			(325,074		)	566			(357,705		)
Cleared derivatives	51,659			—			60,962			—
Total net amounts after netting adjustments, cash collateral, and variation margin for daily settled contracts	52,491			(325,074		)	61,528			(357,705		)
Derivatives not meeting netting requirements
Mortgage delivery commitments	202			(9		)	70			(171		)
Total derivative assets and total derivative liabilities
Uncleared derivatives	832			(325,074		)	566			(357,705		)
Cleared derivatives	51,659			—			60,962			—
Mortgage delivery commitments	202			(9		)	70			(171		)
Total derivative assets and total derivative liabilities presented in the statement of condition	52,693			(325,083		)	61,598			(357,876		)
Non-cash collateral received or pledged not offset (1)
Can be sold or repledged
Uncleared derivatives	—			21,063			—			30,306
Cannot be sold or repledged
Uncleared derivatives	—			278,113			—			290,444
Total non-cash collateral received or pledged, not offset	—			299,176			—			320,750
Net amount
Uncleared derivatives	832			(25,898		)	566			(36,955		)
Cleared derivatives	51,659			—			60,962			—
Mortgage delivery commitments	202			(9		)	70			(171		)
Total net amount	$	52,693		$	(25,907	)	$	61,598		$	(37,126	)

_______________________

(1) Includes non-cash collateral at fair value. Any overcollateralization with a counterparty is not included in the determination of the net amount. At March 31, 2017, and December 31, 2016, we had additional net credit exposure of $1.1 million and $2.0 million, respectively, due to instances where our collateral pledged to a counterparty exceeded our net derivative liability position.

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Deposits (Tables)

3 Months Ended

Mar. 31, 2017

Deposits [Abstract]

Interest-bearing and Non-interest-bearing Deposits [Table Text Block]

The following table details interest- and noninterest-bearing deposits (dollars in thousands):

	March 31, 2017		December 31, 2016
Interest-bearing
Demand and overnight	$	465,931	$	440,731
Other	2,824		4,166
Noninterest-bearing
Other	21,513		37,266
Total deposits	$	490,268	$	482,163

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Consolidated Obligations (Tables)

3 Months Ended

Mar. 31, 2017

Debt Disclosure [Abstract]

CO Bonds by Year of Contractual Maturity [Table Text Block]

The following table sets forth the outstanding CO bonds for which we were primarily liable at March 31, 2017, and December 31, 2016, by year of contractual maturity (dollars in thousands):

	March 31, 2017					December 31, 2016
Year of Contractual Maturity	Amount			Weighted Average Rate (1)		Amount			Weighted Average Rate (1)
Due in one year or less	$	11,252,735		1.37	%	$	8,734,955		1.43	%
Due after one year through two years	6,436,440			1.31		7,752,420			1.19
Due after two years through three years	3,197,930			1.71		3,297,120			1.63
Due after three years through four years	1,361,695			1.89		1,637,335			1.87
Due after four years through five years	2,551,775			1.68		2,574,375			1.65
Thereafter	3,147,595			2.73		3,135,745			2.70
Total par value	27,948,170			1.60	%	27,131,950			1.58	%
Premiums	106,776					118,145
Discounts	(14,606		)			(14,906		)
Hedging adjustments	(61,917		)			(63,755		)
	$	27,978,423				$	27,171,434

_______________________

(1) The CO bonds' weighted-average rate excludes concession fees.

CO Bonds by Call Feature [Table Text Block]

Our CO bonds outstanding at March 31, 2017, and December 31, 2016, included (dollars in thousands):

	March 31, 2017		December 31, 2016
Par value of CO bonds
Noncallable and nonputable	$	23,290,170	$	22,388,950
Callable	4,658,000		4,743,000
Total par value	$	27,948,170	$	27,131,950

CO Bonds by Year of Contractual Maturity or Next Call Date [Table Text Block]

The following is a summary of the CO bonds for which we were primarily liable at March 31, 2017, and December 31, 2016, by year of contractual maturity or next call date for callable CO bonds (dollars in thousands):

Year of Contractual Maturity or Next Call Date	March 31, 2017		December 31, 2016
Due in one year or less	$	15,067,735	$	12,858,955
Due after one year through two years	5,916,440		7,013,420
Due after two years through three years	2,979,930		2,904,120
Due after three years through four years	1,013,695		1,289,335
Due after four years through five years	1,284,775		1,242,375
Thereafter	1,685,595		1,823,745
Total par value	$	27,948,170	$	27,131,950

CO Bonds by Interest-rate-payment Type [Table Text Block]

The following table sets forth the CO bonds for which we were primarily liable by interest-rate-payment type at March 31, 2017, and December 31, 2016 (dollars in thousands):

	March 31, 2017		December 31, 2016
Par value of CO bonds
Fixed-rate	$	20,386,170	$	20,289,950
Simple variable-rate	6,005,000		5,300,000
Step-up	1,557,000		1,542,000
Total par value	$	27,948,170	$	27,131,950

CO Discount Notes [Table Text Block]

Outstanding CO discount notes for which we were primarily liable, all of which are due within one year, were as follows (dollars in thousands):

	Book Value		Par Value		Weighted Average Rate (1)
March 31, 2017	$	24,179,050	$	24,193,530	0.65	%
December 31, 2016	$	30,053,964	$	30,070,103	0.47	%

_______________________

(1) The CO discount notes' weighted-average rate represents a yield to maturity excluding concession fees.

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Affordable Housing Program (Tables)

3 Months Ended

Mar. 31, 2017

Affordable Housing Program [Abstract]

Roll-forward of the AHP Liability[Table Text Block]

The following table presents a roll-forward of the AHP liability for the three months endedMarch 31, 2017, and year ended December 31, 2016 (dollars in thousands):

	March 31, 2017			December 31, 2016
Balance at beginning of period	$	81,627		$	82,081
AHP expense for the period	4,192			19,397
AHP direct grant disbursements	(5,385		)	(18,575		)
AHP subsidy for AHP advance disbursements	(267		)	(1,378		)
Return of previously disbursed grants and subsidies	3			102
Balance at end of period	$	80,170		$	81,627

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Capital (Tables)

3 Months Ended

Mar. 31, 2017

Capital [Abstract]

Compliance with Regulatory Capital Requirements [Table Text Block]

The following tables demonstrate our compliance with our regulatory capital requirements at March 31, 2017, and December 31, 2016 (dollars in thousands):

Risk-Based Capital Requirements	March 31, 2017		December 31, 2016
Permanent capital
Class B capital stock	$	2,458,667	$	2,411,306
Mandatorily redeemable capital stock	32,677		32,687
Retained earnings	1,230,766		1,216,986
Total permanent capital	$	3,722,110	$	3,660,979
Risk-based capital requirement
Credit-risk capital	$	352,679	$	355,182
Market-risk capital	168,602		118,765
Operations-risk capital	156,385		142,184
Total risk-based capital requirement	$	677,666	$	616,131
Permanent capital in excess of risk-based capital requirement	$	3,044,444	$	3,044,848

	March 31, 2017						December 31, 2016
	Required			Actual			Required			Actual
Capital Ratio
Risk-based capital	$	677,666		$	3,722,110		$	616,131		$	3,660,979
Total regulatory capital	$	2,262,752		$	3,722,110		$	2,461,823		$	3,660,979
Total capital-to-asset ratio	4.0		%	6.6		%	4.0		%	5.9		%
Leverage Ratio
Leverage capital	$	2,828,440		$	5,583,165		$	3,077,279		$	5,491,469
Leverage capital-to-assets ratio	5.0		%	9.9		%	5.0		%	8.9		%

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Accumulated Other Comprehensive Loss (Tables)

3 Months Ended

Mar. 31, 2017

AOCI Attributable to Parent [Abstract]

Schedule of Accumulated Other Comprehensive Loss [Table Text Block]

Accumulated Other Comprehensive Loss

The following table presents a summary of changes in accumulated other comprehensive loss for the three months endedMarch 31, 2017 and 2016 (dollars in thousands):

	Net Unrealized Loss on Available-for-sale Securities			Noncredit Portion of Other-than-temporary Impairment Losses on Held-to-maturity Securities			Net Unrealized Loss Relating to Hedging Activities			Pension and Postretirement Benefits			Total Accumulated Other Comprehensive Loss
Balance, December 31, 2015	$	(137,718	)	$	(229,785	)	$	(71,237	)	$	(3,857	)	$	(442,597	)
Other comprehensive income (loss) before reclassifications:
Net unrealized gains (losses)	51,830			—			(17,039		)	—			34,791
Noncredit other-than-temporary impairment losses	—			(8		)	—			—			(8		)
Accretion of noncredit loss	—			9,141			—			—			9,141
Net actuarial gain	—			—			—			1			1
Reclassifications from other comprehensive income to net income
Noncredit other-than-temporary impairment losses reclassified to credit loss (1)	—			913			—			—			913
Amortization - hedging activities (2)	—			—			7,211			—			7,211
Amortization - pension and postretirement benefits (3)	—			—			—			118			118
Other comprehensive income (loss)	51,830			10,046			(9,828		)	119			52,167
Balance, March 31, 2016	$	(85,888	)	$	(219,739	)	$	(81,065	)	$	(3,738	)	$	(390,430	)
Balance, December 31, 2016	$	(136,809	)	$	(192,379	)	$	(48,187	)	$	(6,139	)	$	(383,514	)
Other comprehensive income (loss) before reclassifications:
Net unrealized gains (losses)	26,906			—			(138		)	—			26,768
Accretion of noncredit loss	—			8,296			—			—			8,296
Reclassifications from other comprehensive income to net income
Noncredit other-than-temporary impairment losses reclassified to credit loss (1)	—			365			—			—			365
Amortization - hedging activities (4)	—			—			4,319			—			4,319
Amortization - pension and postretirement benefits (3)	—			—			—			194			194
Other comprehensive income	26,906			8,661			4,181			194			39,942
Balance, March 31, 2017	$	(109,903	)	$	(183,718	)	$	(44,006	)	$	(5,945	)	$	(343,572	)

_______________________

(1) Recorded in net amount of impairment losses reclassified to (from) accumulated other comprehensive loss in the statement of operations.

(2) Amortization of hedging activities includes $7.2 million recorded in CO bond interest expense and $4,000 recorded in net gains (losses) on derivatives and hedging activities in the statement of operations.

(3) Recorded in other operating expenses in the statement of operations.

(4) Amortization of hedging activities includes $4.3 million recorded in CO bond interest expense and $4,000 recorded in net gains (losses) on derivatives and hedging activities in the statement of operations.

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Fair Values (Tables)

3 Months Ended

Mar. 31, 2017

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments [Table Text Block]

The carrying values, fair values, and fair-value hierarchy of our financial instruments at March 31, 2017, and December 31, 2016, were as follows (dollars in thousands). These fair values do not represent an estimate of our overall market value as a going concern, which would take into account, among other things, our future business opportunities and the net profitability of our assets and liabilities.

	March 31, 2017
	Carrying Value			Total Fair Value			Level 1			Level 2			Level 3		Netting Adjustments and Cash Collateral
Financial instruments
Assets:
Cash and due from banks	$	12,817		$	12,817		$	12,817		$	—		$	—	$	—
Interest-bearing deposits	246,317			246,317			246,317			—			—		—
Securities purchased under agreements to resell	2,999,000			2,998,891			—			2,998,891			—		—
Federal funds sold	5,150,000			5,149,928			—			5,149,928			—		—
Trading securities(1)	516,150			516,150			—			516,150			—		—
Available-for-sale securities(1)	6,299,801			6,299,801			—			6,291,617			8,184		—
Held-to-maturity securities	2,004,511			2,249,437			—			1,082,230			1,167,207		—
Advances	35,479,424			35,643,128			—			35,643,128			—		—
Mortgage loans, net	3,675,598			3,708,652			—			3,682,550			26,102		—
Accrued interest receivable	78,816			78,816			—			78,816			—		—
Derivative assets(1)	52,693			52,693			—			60,554			—		(7,861		)
Other assets (1)	21,046			21,046			11,652			9,394			—		—
Liabilities:
Deposits	(490,268		)	(490,263		)	—			(490,263		)	—		—
COs:
Bonds	(27,978,423		)	(28,100,611		)	—			(28,100,611		)	—		—
Discount notes	(24,179,050		)	(24,177,609		)	—			(24,177,609		)	—		—
Mandatorily redeemable capital stock	(32,677		)	(32,677		)	(32,677		)	—			—		—
Accrued interest payable	(100,964		)	(100,964		)	—			(100,964		)	—		—
Derivative liabilities(1)	(325,083		)	(325,083		)	—			(420,440		)	—		95,357
Other:
Commitments to extend credit for advances	—			(4,811		)	—			(4,811		)	—		—
Standby letters of credit	(1,040		)	(1,040		)	—			(1,040		)	—		—

_______________________

(1) Carried at fair value on a recurring basis.

	December 31, 2016
	Carrying Value			Total Fair Value			Level 1			Level 2			Level 3		Netting Adjustments and Cash Collateral
Financial instruments
Assets:
Cash and due from banks	$	520,031		$	520,031		$	520,031		$	—		$	—	$	—
Interest-bearing deposits	278			278			278			—			—		—
Securities purchased under agreements to resell	5,999,000			5,998,799			—			5,998,799			—		—
Federal funds sold	2,700,000			2,699,949			—			2,699,949			—		—
Trading securities(1)	612,622			612,622			—			612,622			—		—
Available-for-sale securities(1)	6,588,664			6,588,664			—			6,580,518			8,146		—
Held-to-maturity securities	2,130,767			2,372,290			—			1,176,269			1,196,021		—
Advances	39,099,339			39,273,044			—			39,273,044			—		—
Mortgage loans, net	3,693,894			3,736,548			—			3,708,123			28,425		—
Accrued interest receivable	84,653			84,653			—			84,653			—		—
Derivative assets(1)	61,598			61,598			—			55,078			—		6,520
Other assets(1)	17,779			17,779			8,394			9,385			—		—
Liabilities:
Deposits	(482,163		)	(482,158		)	—			(482,158		)	—		—
COs:
Bonds	(27,171,434		)	(27,298,499		)	—			(27,298,499		)	—		—
Discount notes	(30,053,964		)	(30,054,085		)	—			(30,054,085		)	—		—
Mandatorily redeemable capital stock	(32,687		)	(32,687		)	(32,687		)	—			—		—
Accrued interest payable	(80,822		)	(80,822		)	—			(80,822		)	—		—
Derivative liabilities(1)	(357,876		)	(357,876		)	—			(460,287		)	—		102,411
Other:
Commitments to extend credit for advances	—			(4,412		)	—			(4,412		)	—		—
Standby letters of credit	(1,064		)	(1,064		)	—			(1,064		)	—		—

_______________________

(1) Carried at fair value on a recurring basis.

Fair Value Measured on Recurring Basis [Table Text Block]

The following tables present our assets and liabilities that are measured at fair value on the statement of condition, which are recorded on a recurring basis at March 31, 2017, and December 31, 2016, by fair-value hierarchy level (dollars in thousands):

	March 31, 2017
	Level 1		Level 2			Level 3		Netting Adjustment (1)			Total
Assets:
Trading securities:
U.S. Treasury obligations	$	—	$	308,698		$	—	$	—		$	308,698
U.S. government-guaranteed – single-family MBS	—		8,050			—		—			8,050
GSEs – single-family MBS	—		644			—		—			644
GSEs – multifamily MBS	—		198,758			—		—			198,758
Total trading securities	—		516,150			—		—			516,150
Available-for-sale securities:
State or local HFA securities	—		—			8,184		—			8,184
Supranational institutions	—		422,339			—		—			422,339
U.S. government-owned corporations	—		276,616			—		—			276,616
GSEs	—		118,344			—		—			118,344
U.S. government guaranteed – single-family MBS	—		117,678			—		—			117,678
U.S. government guaranteed – multifamily MBS	—		510,132			—		—			510,132
GSEs – single-family MBS	—		4,175,508			—		—			4,175,508
GSEs – multifamily MBS	—		671,000			—		—			671,000
Total available-for-sale securities	—		6,291,617			8,184		—			6,299,801
Derivative assets:
Interest-rate-exchange agreements	—		60,352			—		(7,861		)	52,491
Mortgage delivery commitments	—		202			—		—			202
Total derivative assets	—		60,554			—		(7,861		)	52,693
Other assets	11,652		9,394			—		—			21,046
Total assets at fair value	$	11,652	$	6,877,715		$	8,184	$	(7,861	)	$	6,889,690
Liabilities:
Derivative liabilities
Interest-rate-exchange agreements	$	—	$	(420,431	)	$	—	$	95,357		$	(325,074	)
Mortgage delivery commitments	—		(9		)	—		—			(9		)
Total liabilities at fair value	$	—	$	(420,440	)	$	—	$	95,357		$	(325,083	)

_______________________

(1) These amounts represent the application of the netting requirements which allow us to settle positive and negative positions and also cash collateral and related accrued interest held or placed with the same clearing member and/or counterparty.

	December 31, 2016
	Level 1		Level 2			Level 3		Netting Adjustment (1)		Total
Assets:
Trading securities:
U.S. Treasury obligations	$	—	$	399,521		$	—	$	—	$	399,521
U.S. government-guaranteed – single-family MBS	—		8,494			—		—		8,494
GSEs – single-family MBS	—		768			—		—		768
GSEs – multifamily MBS	—		203,839			—		—		203,839
Total trading securities	—		612,622			—		—		612,622
Available-for-sale securities:
State or local HFA securities	—		—			8,146		—		8,146
Supranational institutions	—		422,620			—		—		422,620
U.S. government-owned corporations	—		271,957			—		—		271,957
GSEs	—		117,468			—		—		117,468
U.S. government guaranteed – single-family MBS	—		124,727			—		—		124,727
U.S. government guaranteed – multifamily MBS	—		563,361			—		—		563,361
GSEs – single-family MBS	—		4,403,855			—		—		4,403,855
GSEs – multifamily MBS	—		676,530			—		—		676,530
Total available-for-sale securities	—		6,580,518			8,146		—		6,588,664
Derivative assets:
Interest-rate-exchange agreements	—		55,008			—		6,520		61,528
Mortgage delivery commitments	—		70			—		—		70
Total derivative assets	—		55,078			—		6,520		61,598
Other assets	8,394		9,385			—		—		17,779
Total assets at fair value	$	8,394	$	7,257,603		$	8,146	$	6,520	$	7,280,663
Liabilities:
Derivative liabilities
Interest-rate-exchange agreements	$	—	$	(460,116	)	$	—	$	102,411	$	(357,705	)
Mortgage delivery commitments	—		(171		)	—		—		(171		)
Total liabilities at fair value	$	—	$	(460,287	)	$	—	$	102,411	$	(357,876	)

_______________________

(1) These amounts represent the application of the netting requirements which allow us to settle positive and negative positions and also cash collateral and related accrued interest held or placed with the same clearing member and/or counterparty.

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

The following table presents a reconciliation of available-for-sale securities that are measured at fair value on a recurring basis

using significant unobservable inputs (Level 3) during the three months endedMarch 31, 2017. There were no Level 3 available-for-sale securities during the three months endedMarch 31, 2016 (dollars in thousands).

	March 31, 2017
Balance at beginning of period	$	8,146
Purchases	—
Unrealized gains included in other comprehensive income	38
Balance at end of period	$	8,184

Fair Value on a Nonrecurring Basis [Table Text Block]

The following tables present financial assets by level within the fair-value hierarchy which were recorded at fair value on a nonrecurring basis. The fair values presented are as of the date the fair value adjustment was recorded (dollars in thousands).

	March 31, 2017
	Level 1		Level 2		Level 3		Total
Held-to-maturity securities:
Private-label residential MBS	$	—	$	—	$	5,264	$	5,264
Mortgage loans held for portfolio	—		—		5,145		5,145
REO	—		—		544		544
Total assets recorded at fair value on a nonrecurring basis	$	—	$	—	$	10,953	$	10,953

	December 31, 2016
	Level 1		Level 2		Level 3		Total
Held-to-maturity securities:
Private-label residential MBS	$	—	$	—	$	8,498	$	8,498
Mortgage loans held for portfolio	—		—		5,618		5,618
REO	—		—		786		786
Total assets recorded at fair value on a nonrecurring basis	$	—	$	—	$	14,902	$	14,902

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Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Off-Balance Sheet Commitments [Table Text Block]

The following table sets forth our off-balance-sheet commitments as of March 31, 2017, and December 31, 2016 (dollars in thousands):

	March 31, 2017						December 31, 2016
	Expire within one year		Expire after one year		Total		Expire within one year		Expire after one year		Total
Standby letters of credit outstanding (1)	$	4,472,318	$	174,997	$	4,647,315	$	4,050,447	$	179,632	$	4,230,079
Commitments for unused lines of credit - advances (2)	1,261,985		—		1,261,985		1,255,140		—		1,255,140
Commitments to make additional advances	33,928		73,193		107,121		44,865		65,972		110,837
Commitments to invest in mortgage loans	37,827		—		37,827		22,524		—		22,524
Unsettled CO bonds, at par	70,750		—		70,750		—		—		—

__________________________

(1) The amount of standby letters of credit outstanding excludes commitments to issue standby letters of credit that expire within one year. At March 31, 2017, and December 31, 2016, these amounts totaled $44.1 million and $2.7 million, respectively. Also excluded are commitments to issue standby letters of credit that expire after one year totaling $285,000 at December 31, 2016.

(2) Commitments for unused line-of-credit advances are generally for periods of up to 12 months. Since many of these commitments are not expected to be drawn upon, the total commitment amount does not necessarily indicate future liquidity requirements.

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Transactions with Shareholders (Tables)

3 Months Ended

Mar. 31, 2017

Transactions with Shareholders [Abstract]

Schedule of Transactions with Shareholders [Table Text Block]

The following tables present transactions with shareholders whose holdings of capital stock exceed 10 percent or more of total capital stock outstanding at March 31, 2017, and December 31, 2016 (dollars in thousands):

	Capital Stock Outstanding		Percent of Total		Par Value of Advances		Percent of Total Par Value of Advances		Total Accrued Interest Receivable		Percent of Total Accrued Interest Receivable on Advances
As of March 31, 2017
Citizens Bank, N.A.	$	352,223	14.1	%	$	5,260,581	14.8	%	$	2,345	6.2	%
As of December 31, 2016
Citizens Bank, N.A.	$	357,508	14.6	%	$	7,260,446	18.6	%	$	2,625	7.3	%

Schedule of Transactions with Shareholders, Interest Income [Table Text Block]

We recognized interest income on outstanding advances and fees on letters of credit from Citizens Bank, N.A. during the three months endedMarch 31, 2017 and 2016, as follows (dollars in thousands):

	For the Three Months Ended March 31,
Citizens Bank, N.A.	2017		2016
Interest income on advances	$	14,111	$	8,204
Fees on letters of credit	745		840

Schedule of Transactions with Shareholders, Transactions with Directors' Financial Institutions [Table Text Block]

The following table presents the outstanding balances of capital stock, advances, and accrued interest receivable with members whose officers or directors serve on our board of directors, and those balances as a percentage of our total balance as reported on our statement of condition (dollars in thousands):

	Capital Stock Outstanding		Percent of Total		Par Value of Advances		Percent of Total Par Value of Advances		Total Accrued Interest Receivable		Percent of Total Accrued Interest Receivable on Advances
As of March 31, 2017	$	82,433	3.3	%	$	1,319,925	3.7	%	$	1,564	4.2	%
As of December 31, 2016	91,374		3.7		1,554,753		4.0		1,631		4.5

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Trading Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of Trading Securities and Other Trading Assets [Line Items]
Trading securities	$ 516,150	$ 612,622
U.S. Treasury obligations [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Trading securities	308,698	399,521
U.S. government-guaranteed - single-family MBS [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Trading securities	8,050	8,494
MBS [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Trading securities	207,452	213,101
GSEs - single-family [Member] | Government Sponsored Enterprises [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Trading securities	644	768
GSEs - multifamily [Member] | Government Sponsored Enterprises [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Trading securities	$ 198,758	$ 203,839

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Trading Securities - Net Unrealized (Losses) Gains (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Trading Securities [Abstract]
Net unrealized (losses) gains on trading securities	$ (1,414)	$ 1,873

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Available-for-Sale Securities Major Security Types (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	[1]	$ 6,409,704	$ 6,725,473
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Loss		6,204	3,068
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Loss		(116,107)	(139,877)
Available-for-sale securities Fair Value		6,299,801	6,588,664
States or local housing-finance-agency obligations (HFA securities) [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	[1]	9,350	9,350
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Loss		0	0
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Loss		(1,166)	(1,204)
Available-for-sale securities Fair Value		8,184	8,146
Supranational institutions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	[1]	447,485	452,021
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Loss		0	0
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Loss		(25,146)	(29,401)
Available-for-sale securities Fair Value		422,339	422,620
U.S. government-owned corporations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	[1]	313,779	317,588
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Loss		0	0
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Loss		(37,163)	(45,631)
Available-for-sale securities Fair Value		276,616	271,957
GSEs [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	[1]	129,336	130,798
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Loss		0	0
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Loss		(10,992)	(13,330)
Available-for-sale securities Fair Value		118,344	117,468
Other Than Mortgage-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	[1]	899,950	909,757
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Loss		0	0
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Loss		(74,467)	(89,566)
Available-for-sale securities Fair Value		825,483	820,191
U.S. government-guaranteed - single-family MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	[1]	119,919	127,032
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Loss		62	16
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Loss		(2,303)	(2,321)
Available-for-sale securities Fair Value		117,678	124,727
U.S. government guaranteed - multifamily MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	[1]	512,927	565,593
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Loss		0	45
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Loss		(2,795)	(2,277)
Available-for-sale securities Fair Value		510,132	563,361
MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	[1],[2]	5,509,754	5,815,716
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Loss		6,204	3,068
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Loss		(41,640)	(50,311)
Available-for-sale securities Fair Value	[2]	5,474,318	5,768,473
Single Family [Member] | GSEs – MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	[1]	4,208,100	4,447,803
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Loss		3,950	1,765
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Loss		(36,542)	(45,713)
Available-for-sale securities Fair Value		4,175,508	4,403,855
Multifamily [Member] | GSEs – MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	[1]	668,808	675,288
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Loss		2,192	1,242
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Loss		0	0
Available-for-sale securities Fair Value		$ 671,000	$ 676,530

[1] Amortized cost of available-for-sale securities includes adjustments made to the cost basis of an investment for accretion, amortization, collection of cash, and fair-value hedge accounting adjustments.

[2] MBS are not presented by contractual maturity because their expected maturities will likely differ from contractual maturities because borrowers of the underlying loans may have the right to call or prepay obligations with or without call or prepayment fees.

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Available-for-Sale Securities Securities with Unrealized Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	$ 3,389,570	$ 3,882,972
Less than 12 Months, Unrealized Losses	(33,893)	(41,650)
12 Months or More, Fair Value	1,377,227	1,419,476
12 Months or More, Unrealized Losses	(82,214)	(98,227)
Total Fair Value	4,766,797	5,302,448
Total Unrealized Losses	(116,107)	(139,877)
HFA securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	8,184	8,146
Less than 12 Months, Unrealized Losses	(1,166)	(1,204)
12 Months or More, Fair Value	0	0
12 Months or More, Unrealized Losses	0	0
Total Fair Value	8,184	8,146
Total Unrealized Losses	(1,166)	(1,204)
Supranational institutions [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	0	0
Less than 12 Months, Unrealized Losses	0	0
12 Months or More, Fair Value	422,339	422,620
12 Months or More, Unrealized Losses	(25,146)	(29,401)
Total Fair Value	422,339	422,620
Total Unrealized Losses	(25,146)	(29,401)
U.S. government-owned corporations [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	0	0
Less than 12 Months, Unrealized Losses	0	0
12 Months or More, Fair Value	276,616	271,957
12 Months or More, Unrealized Losses	(37,163)	(45,631)
Total Fair Value	276,616	271,957
Total Unrealized Losses	(37,163)	(45,631)
GSEs [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	0	0
Less than 12 Months, Unrealized Losses	0	0
12 Months or More, Fair Value	118,344	117,468
12 Months or More, Unrealized Losses	(10,992)	(13,330)
Total Fair Value	118,344	117,468
Total Unrealized Losses	(10,992)	(13,330)
Other Than Mortgage-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	8,184	8,146
Less than 12 Months, Unrealized Losses	(1,166)	(1,204)
12 Months or More, Fair Value	817,299	812,045
12 Months or More, Unrealized Losses	(73,301)	(88,362)
Total Fair Value	825,483	820,191
Total Unrealized Losses	(74,467)	(89,566)
U.S. government-guaranteed - single-family MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	0	31,606
Less than 12 Months, Unrealized Losses	0	(4)
12 Months or More, Fair Value	86,435	90,854
12 Months or More, Unrealized Losses	(2,303)	(2,317)
Total Fair Value	86,435	122,460
Total Unrealized Losses	(2,303)	(2,321)
U.S. government guaranteed - multifamily MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	364,121	326,126
Less than 12 Months, Unrealized Losses	(1,760)	(1,261)
12 Months or More, Fair Value	146,011	165,246
12 Months or More, Unrealized Losses	(1,035)	(1,016)
Total Fair Value	510,132	491,372
Total Unrealized Losses	(2,795)	(2,277)
MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	3,381,386	3,874,826
Less than 12 Months, Unrealized Losses	(32,727)	(40,446)
12 Months or More, Fair Value	559,928	607,431
12 Months or More, Unrealized Losses	(8,913)	(9,865)
Total Fair Value	3,941,314	4,482,257
Total Unrealized Losses	(41,640)	(50,311)
GSEs - single-family [Member] | GSEs – MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	3,017,265	3,517,094
Less than 12 Months, Unrealized Losses	(30,967)	(39,181)
12 Months or More, Fair Value	327,482	351,331
12 Months or More, Unrealized Losses	(5,575)	(6,532)
Total Fair Value	3,344,747	3,868,425
Total Unrealized Losses	$ (36,542)	$ (45,713)

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Available-for-Sale Securities Redemption Terms (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	[1]	$ 6,409,704	$ 6,725,473
Fair Value		6,299,801	6,588,664
Other Than Mortgage-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Due in one year or less, amortized cost		0	0
Due in one year or less, fair value		0	0
Due after one year through five years, amortized cost		9,350	9,350
Due after one year through five years, fair value		8,184	8,146
Due after five years through 10 years, amortized cost		169,829	171,589
Due after five years through 10 years, fair value		160,476	161,746
Due after 10 years, amortized cost		720,771	728,818
Due after 10 years, fair value		656,823	650,299
Amortized Cost	[1]	899,950	909,757
Fair Value		825,483	820,191
MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	[1],[2]	5,509,754	5,815,716
Fair Value	[2]	$ 5,474,318	$ 5,768,473

[1] Amortized cost of available-for-sale securities includes adjustments made to the cost basis of an investment for accretion, amortization, collection of cash, and fair-value hedge accounting adjustments.

[2] MBS are not presented by contractual maturity because their expected maturities will likely differ from contractual maturities because borrowers of the underlying loans may have the right to call or prepay obligations with or without call or prepayment fees.

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Held-to-Maturity Securities Major Security Types (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost		$ 2,188,228	$ 2,323,145
Other-Than-Temporary Impairment Recognized in Accumulated Other Comprehensive Loss		(183,717)	(192,378)
Carrying Value	[1],[2]	2,004,511	2,130,767
Gross Unrecognized Holding Gains		270,713	270,306
Gross Unrecognized Holding Losses		(25,787)	(28,783)
Held-to-maturity securities Fair Value		2,249,437	2,372,290
U.S. agency obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost		1,922	2,159
Other-Than-Temporary Impairment Recognized in Accumulated Other Comprehensive Loss		0	0
Carrying Value		1,922	2,159
Gross Unrecognized Holding Gains		41	56
Gross Unrecognized Holding Losses		0	0
Held-to-maturity securities Fair Value		1,963	2,215
HFA securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost		161,289	162,568
Other-Than-Temporary Impairment Recognized in Accumulated Other Comprehensive Loss		0	0
Carrying Value		161,289	162,568
Gross Unrecognized Holding Gains		11	11
Gross Unrecognized Holding Losses		(17,212)	(19,291)
Held-to-maturity securities Fair Value		144,088	143,288
Other Than Mortgage-backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost		163,211	164,727
Other-Than-Temporary Impairment Recognized in Accumulated Other Comprehensive Loss		0	0
Carrying Value	[1]	163,211	164,727
Gross Unrecognized Holding Gains		52	67
Gross Unrecognized Holding Losses		(17,212)	(19,291)
Held-to-maturity securities Fair Value		146,051	145,503
U.S. government-guaranteed - single-family MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost		12,073	12,719
Other-Than-Temporary Impairment Recognized in Accumulated Other Comprehensive Loss		0	0
Carrying Value		12,073	12,719
Gross Unrecognized Holding Gains		243	246
Gross Unrecognized Holding Losses		0	0
Held-to-maturity securities Fair Value		12,316	12,965
U.S. government guaranteed - multifamily MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost		1,489	1,532
Other-Than-Temporary Impairment Recognized in Accumulated Other Comprehensive Loss		0	0
Carrying Value		1,489	1,532
Gross Unrecognized Holding Gains		0	0
Gross Unrecognized Holding Losses		(3)	0
Held-to-maturity securities Fair Value		1,486	1,532
Asset-backed securities backed by home equity loans [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost		13,080	13,515
Other-Than-Temporary Impairment Recognized in Accumulated Other Comprehensive Loss		(552)	(574)
Carrying Value		12,528	12,941
Gross Unrecognized Holding Gains		554	602
Gross Unrecognized Holding Losses		(508)	(600)
Held-to-maturity securities Fair Value		12,574	12,943
MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	[3]	2,025,017	2,158,418
Other-Than-Temporary Impairment Recognized in Accumulated Other Comprehensive Loss		(183,717)	(192,378)
Carrying Value	[1],[3]	1,841,300	1,966,040
Gross Unrecognized Holding Gains		270,661	270,239
Gross Unrecognized Holding Losses		(8,575)	(9,492)
Held-to-maturity securities Fair Value	[3]	2,103,386	2,226,787
GSEs - single-family [Member] | GSEs – MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost		744,548	812,836
Other-Than-Temporary Impairment Recognized in Accumulated Other Comprehensive Loss		0	0
Carrying Value		744,548	812,836
Gross Unrecognized Holding Gains		15,430	16,881
Gross Unrecognized Holding Losses		(455)	(519)
Held-to-maturity securities Fair Value		759,523	829,198
GSEs - multifamily [Member] | GSEs – MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost		296,207	318,667
Other-Than-Temporary Impairment Recognized in Accumulated Other Comprehensive Loss		0	0
Carrying Value		296,207	318,667
Gross Unrecognized Holding Gains		10,735	11,692
Gross Unrecognized Holding Losses		0	0
Held-to-maturity securities Fair Value		306,942	330,359
Private-label - residential MBS [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost		957,620	999,149
Other-Than-Temporary Impairment Recognized in Accumulated Other Comprehensive Loss		(183,165)	(191,804)
Carrying Value		774,455	807,345
Gross Unrecognized Holding Gains		243,699	240,818
Gross Unrecognized Holding Losses		(7,609)	(8,373)
Held-to-maturity securities Fair Value		$ 1,010,545	$ 1,039,790

[1] Carrying value of held-to-maturity securities represents the sum of amortized cost and the amount of noncredit-related other-than-temporary impairment recognized in accumulated other comprehensive loss.

[2] Fair values of held-to-maturity securities were $2,249,437 and $2,372,290 at March 31, 2017, and December 31, 2016, respectively.

[3] MBS are not presented by contractual maturity because their expected maturities will likely differ from contractual maturities because borrowers of the underlying loans may have the right to call or prepay their obligations with or without call or prepayment fees.

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Held-to-Maturity Securities Fair Value and Unrealized Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 Months, Fair Value	$ 37,687	$ 100,206
Less than 12 Months, Unrealized Losses	(449)	(521)
12 Months or More, Fair Value	503,277	563,669
12 Months or More, Unrealized Losses	(41,140)	(48,918)
Total Fair Value	540,964	663,875
Total Unrealized Losses	(41,589)	(49,439)
HFA securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 Months, Fair Value	0	0
Less than 12 Months, Unrealized Losses	0	0
12 Months or More, Fair Value	141,759	140,959
12 Months or More, Unrealized Losses	(17,212)	(19,291)
Total Fair Value	141,759	140,959
Total Unrealized Losses	(17,212)	(19,291)
U.S. government guaranteed - multifamily MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 Months, Fair Value	1,486
Less than 12 Months, Unrealized Losses	(3)
12 Months or More, Fair Value	0
12 Months or More, Unrealized Losses	0
Total Fair Value	1,486
Total Unrealized Losses	(3)
Asset-backed securities backed by home equity loans [Member]
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 Months, Fair Value	0	0
Less than 12 Months, Unrealized Losses	0	0
12 Months or More, Fair Value	11,584	11,898
12 Months or More, Unrealized Losses	(656)	(720)
Total Fair Value	11,584	11,898
Total Unrealized Losses	(656)	(720)
MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 Months, Fair Value	37,687	100,206
Less than 12 Months, Unrealized Losses	(449)	(521)
12 Months or More, Fair Value	361,518	422,710
12 Months or More, Unrealized Losses	(23,928)	(29,627)
Total Fair Value	399,205	522,916
Total Unrealized Losses	(24,377)	(30,148)
GSEs - single-family [Member] | GSEs – MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 Months, Fair Value	21,376	83,291
Less than 12 Months, Unrealized Losses	(331)	(393)
12 Months or More, Fair Value	23,144	13,405
12 Months or More, Unrealized Losses	(124)	(126)
Total Fair Value	44,520	96,696
Total Unrealized Losses	(455)	(519)
Private-label - residential MBS [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 Months, Fair Value	14,825	16,915
Less than 12 Months, Unrealized Losses	(115)	(128)
12 Months or More, Fair Value	326,790	397,407
12 Months or More, Unrealized Losses	(23,148)	(28,781)
Total Fair Value	341,615	414,322
Total Unrealized Losses	$ (23,263)	$ (28,909)

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Held-to-Maturity Securities Redemption Terms (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost		$ 2,188,228	$ 2,323,145
Carrying Value	[1],[2]	2,004,511	2,130,767
Fair Value		2,249,437	2,372,290
Other Than Mortgage-backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Due in one year or less, Amortized Cost		0	0
Due in one year or less, Carrying Value	[1]	0	0
Due in one year or less, Fair Value		0	0
Due after one year through five years, Amortized Cost		16,401	16,637
Due after one year through five years, Carrying Value	[1]	16,401	16,637
Due after one year through five years, Fair Value		16,446	16,663
Due after five years through 10 years, Amortized Cost		0	0
Due after five years through 10 years, Carrying Value	[1]	0	0
Due after five years through 10 years, Fair Value		0	0
Due after 10 years, Amortized Cost		146,810	148,090
Due after 10 years, Carrying Value	[1]	146,810	148,090
Due after 10 years, Fair Value		129,605	128,840
Amortized Cost		163,211	164,727
Carrying Value	[1]	163,211	164,727
Fair Value		146,051	145,503
MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	[3]	2,025,017	2,158,418
Carrying Value	[1],[3]	1,841,300	1,966,040
Fair Value	[3]	$ 2,103,386	$ 2,226,787

[1] Carrying value of held-to-maturity securities represents the sum of amortized cost and the amount of noncredit-related other-than-temporary impairment recognized in accumulated other comprehensive loss.

[2] Fair values of held-to-maturity securities were $2,249,437 and $2,372,290 at March 31, 2017, and December 31, 2016, respectively.

[3] MBS are not presented by contractual maturity because their expected maturities will likely differ from contractual maturities because borrowers of the underlying loans may have the right to call or prepay their obligations with or without call or prepayment fees.

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Other-Than-Temporary Impairment Significant Inputs (Details) - Alt-A [Member] - Mortgage-backed Securities, Issued by Private Enterprises [Member] - Residential Mortgage Backed Securities [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($)	[1]
Other than Temporary Impairment, Disclosure [Line Items]
Par Value	$ 46,262
Project Prepayment Rates - Weighted Average Percent	7.70%
Projected Default Rates, Weighted Average Percent	31.70%
Projected Loss Severities, Weighted Average Percent	37.60%
Current Credit Enhancement, Weighted Average Percent	4.40%

[1] Securities are classified based upon the current performance characteristics of the underlying loan pool and therefore the manner in which the loan pool backing the security has been modeled (as prime, Alt-A, or subprime), rather than their classification of the security at the time of issuance.

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Other-Than-Temporary Impairment OTTI Credit Losses Recognized During Life of Security (Details) - Held-to-maturity Securities [Member] $ in Thousands	Mar. 31, 2017 USD ($)	[1]
Other-than-temporary Impairment Credit Losses Recognized During the Life of the Security [Abstract]
Par Value	$ 1,103,504
Amortized Cost	822,320
Carrying Value	638,604
Fair Value	882,818
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Residential Mortgage Backed Securities [Member] | Prime [Member]
Other-than-temporary Impairment Credit Losses Recognized During the Life of the Security [Abstract]
Par Value	37,589
Amortized Cost	32,394
Carrying Value	25,666
Fair Value	33,369
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Residential Mortgage Backed Securities [Member] | Alt-A [Member]
Other-than-temporary Impairment Credit Losses Recognized During the Life of the Security [Abstract]
Par Value	1,062,245
Amortized Cost	786,567
Carrying Value	610,130
Fair Value	846,087
Asset-backed securities backed by home equity loans [Member] | Subprime [Member]
Other-than-temporary Impairment Credit Losses Recognized During the Life of the Security [Abstract]
Par Value	3,670
Amortized Cost	3,359
Carrying Value	2,808
Fair Value	$ 3,362

[1] We have instituted litigation related to certain of the private-label MBS in which we invested. Our complaint asserts, among others, claims for untrue or misleading statements in the sale of securities. It is possible that classifications of private-label MBS as provided herein when based on classification at the time of issuance as disclosed by those securities' issuance documents, as well as other statements about the securities, are inaccurate.

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Other-Than-Temporary Impairment Roll-forward of Amounts Related to Credit Losses Recognized in Earnings (Details) - Held-to-maturity Securities [Member] - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance at beginning of period		$ 490,404	$ 533,888
Additional credit losses for which an other-than-temporary impairment charge was previously recognized	[1]	418	1,347
Increase in cash flows expected to be collected which are recognized over the remaining life of the security	[2]	(8,601)	(9,426)
Balance at end of period		$ 482,221	$ 525,809

[1] For the three months March 31, 2017 and 2016, additional credit losses for which an other-than-temporary impairment charge was previously recognized relate to securities that were also previously impaired prior to January 1, 2017 and 2016, respectively.

[2] Represents amounts accreted as interest income during the current period.

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Advances - Year of Contractual Maturity (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Federal Home Loan Bank, Advances, Maturity, Rolling Year, Par Value [Abstract]
Overdrawn demand-deposit accounts		$ 7,935	$ 3,780
Due in one year or less		17,444,622	18,783,802
Due after one year through two years		8,673,994	10,966,780
Due after two years through three years		2,821,139	2,508,459
Due after three years through four years		2,011,518	2,177,432
Due after four years through five years		1,889,679	2,041,269
Thereafter		2,671,123	2,633,333
Total par value		$ 35,520,010	$ 39,114,855
Federal Home Loan Bank, Advances, Weighted Average Interest Rate, Rolling Year [Abstract]
Overdrawn demand-deposit accounts, Weighted average rate		1.21%	0.92%
Due in one year or less, Weighted average rate		1.22%	1.05%
Due after one year through two years, Weighted average rate		1.31%	1.15%
Due after two years through three years, Weighted average rate		1.72%	1.67%
Due after three years through four years, Weighted average rate		1.74%	1.64%
Due after four years through five years, Weighted average rate		1.86%	1.80%
Thereafter, Weighted average rate		1.63%	1.70%
Total Weighted average rate		1.38%	1.23%
Premiums		$ 21,143	$ 22,633
Discounts		(28,551)	(25,847)
Fair value of bifurcated derivatives	[1]	(576)	(153)
Hedging adjustments		(32,602)	(12,149)
Total Advances		$ 35,479,424	$ 39,099,339

[1] At March 31, 2017, and December 31, 2016, we had certain advances with embedded features that met the requirements to be separated from the host contract and designated as stand-alone derivatives.

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Advances Advances - Year of Contractual Maturity or Next Call Date (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Call Date, Rolling Year, Par Value [Abstract]
Overdrawn demand-deposit accounts		$ 7,935	$ 3,780
Due in one year or less	[1]	23,108,797	26,447,977
Due after one year through two years	[1]	3,410,994	3,693,780
Due after two years through three years	[1]	2,821,139	2,508,459
Due after three years through four years	[1]	1,826,318	2,002,232
Due after four years through five years	[1]	1,739,679	1,891,269
Thereafter	[1]	2,605,148	2,567,358
Total par value		$ 35,520,010	$ 39,114,855

[1] Also includes certain floating-rate advances that may be contractually prepaid by the borrower on a floating-rate reset date without incurring prepayment or termination fees.

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Advances - Outstanding by the Earlier of Contractual Maturity or Next Put Date (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put or Convert Date, Rolling Year, Par Value [Abstract]
Overdrawn demand-deposit accounts	$ 7,935	$ 3,780
Due in one year or less	19,278,622	20,788,552
Due after one year through two years	8,991,244	10,946,530
Due after two years through three years	2,723,139	2,455,709
Due after three years through four years	1,842,518	1,974,932
Due after four years through five years	1,594,179	1,736,769
Thereafter	1,082,373	1,208,583
Total par value	$ 35,520,010	$ 39,114,855

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Advances - Interest-Rate-Payment Terms (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Federal Home Loan Bank, Advances, Fixed Rate [Abstract]
Total fixed-rate	$ 28,953,692	$ 30,526,192
Federal Home Loan Bank, Advances, Floating Rate [Abstract]
Total variable-rate	6,566,318	8,588,663
Total par value	$ 35,520,010	$ 39,114,855

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Advances - Narratives (Details) $ in Thousands	Mar. 31, 2017 USD ($) Borrowers	Dec. 31, 2016 USD ($) Borrowers
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Advances, Par Value	$ 35,520,010	$ 39,114,855
Credit Risk Exposure and Security Terms [Abstract]
Total outstanding advances greater than $1.0 billion per borrower, amount	12,400,000	$ 16,200,000
Minimum amount of advances outstanding per borrower	$ 1,000,000
Federal Home Loan Bank Advances [Member]
Credit Risk Exposure and Security Terms [Abstract]
Number of financial institutions with more than $1.0 billion advances borrowing | Borrowers	6	6
Total outstanding advances greater than $1.0 billion per borrower as a percentage of advances outstanding	35.00%	41.50%
Minimum [Member]
Federal Home Loan Bank, Advances [Line Items]
Interest rates of advances outstanding	0.00%	0.00%
Maximum [Member]
Federal Home Loan Bank, Advances [Line Items]
Interest rates of advances outstanding	7.72%	7.72%
Federal Home Loan Bank, Advances, Callable Option [Member]
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Advances, Par Value	$ 5,900,000	$ 7,900,000
Federal Home Loan Bank, Advances, Putable Option [Member]
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Advances, Par Value	$ 3,300,000	$ 3,400,000

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Mortgage Loans Held for Portfolio (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Mortgage Loans on Real Estate [Line Items]
Par Value	$ 3,609,732	$ 3,626,962
Premiums	66,437	67,523
Discounts	(1,681)	(1,696)
Deferred derivative gains, net	1,735	1,755
Total mortgage loans held for portfolio	3,676,223	3,694,544
Less: allowance for credit losses	(625)	(650)
Total mortgage loans, net of allowance for credit losses	$ 3,675,598	3,693,894
Fixed-rate 15-year single-family mortgages
Mortgage Loans on Real Estate [Line Items]
Original contractual terms	15 years
Conventional mortgage loans [Member]
Mortgage Loans on Real Estate [Line Items]
Par Value	$ 3,228,586	3,235,835
Minimum [Member] | Fixed-rate 20- and 30-year single-family mortgages
Mortgage Loans on Real Estate [Line Items]
Original contractual terms	20 years
Maximum [Member] | Fixed-rate 20- and 30-year single-family mortgages
Mortgage Loans on Real Estate [Line Items]
Original contractual terms	30 years
Government mortgage loans [Member]
Mortgage Loans on Real Estate [Line Items]
Par Value	$ 381,146	391,127
Single Family [Member] | Fixed-rate 15-year single-family mortgages
Mortgage Loans on Real Estate [Line Items]
Par Value	509,001	528,486
Single Family [Member] | Fixed-rate 20- and 30-year single-family mortgages
Mortgage Loans on Real Estate [Line Items]
Par Value	$ 3,100,731	$ 3,098,476

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Allowance for credit losses - Credit Quality Indicators (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Mortgage Loans Past Due [Line Items]
Total past due		$ 72,293	$ 73,175
Total current loans		3,622,509	3,640,109
Total mortgage loans		3,694,802	3,713,284
In process of foreclosure, included above	[1]	$ 8,196	$ 8,997
Serious delinquency rate	[2]	0.55%	0.63%
Past due 90 days or more still accruing interest		$ 5,093	$ 5,807
Loans on nonaccrual status	[3]	$ 14,753	16,940
Number of days past due, loans at serious delinquent status		90 days
Recorded Investment in Government Mortgage Loans [Member]
Mortgage Loans Past Due [Line Items]
Total past due		$ 22,791	24,531
Total current loans		368,795	377,438
Total mortgage loans		391,586	401,969
In process of foreclosure, included above	[1]	$ 1,003	$ 1,502
Serious delinquency rate	[2]	1.30%	1.44%
Past due 90 days or more still accruing interest		$ 5,093	$ 5,807
Loans on nonaccrual status	[3]	0	0
Recorded Investment in Conventional Mortgage Loans [Member]
Mortgage Loans Past Due [Line Items]
Total past due		49,502	48,644
Total current loans		3,253,714	3,262,671
Total mortgage loans		3,303,216	3,311,315
In process of foreclosure, included above	[1]	$ 7,193	$ 7,495
Serious delinquency rate	[2]	0.46%	0.53%
Past due 90 days or more still accruing interest		$ 0	$ 0
Loans on nonaccrual status	[3]	14,753	16,940
Past due 30-59 days delinquent [Member]
Mortgage Loans Past Due [Line Items]
Total past due		42,023	41,635
Past due 30-59 days delinquent [Member] | Recorded Investment in Government Mortgage Loans [Member]
Mortgage Loans Past Due [Line Items]
Total past due		14,051	14,878
Past due 30-59 days delinquent [Member] | Recorded Investment in Conventional Mortgage Loans [Member]
Mortgage Loans Past Due [Line Items]
Total past due		27,972	26,757
Past due 60-89 days delinquent [Member]
Mortgage Loans Past Due [Line Items]
Total past due		10,713	9,354
Past due 60-89 days delinquent [Member] | Recorded Investment in Government Mortgage Loans [Member]
Mortgage Loans Past Due [Line Items]
Total past due		3,647	3,846
Past due 60-89 days delinquent [Member] | Recorded Investment in Conventional Mortgage Loans [Member]
Mortgage Loans Past Due [Line Items]
Total past due		7,066	5,508
Past due 90 days or more delinquent [Member]
Mortgage Loans Past Due [Line Items]
Total past due		19,557	22,186
Past due 90 days or more delinquent [Member] | Recorded Investment in Government Mortgage Loans [Member]
Mortgage Loans Past Due [Line Items]
Total past due		5,093	5,807
Past due 90 days or more delinquent [Member] | Recorded Investment in Conventional Mortgage Loans [Member]
Mortgage Loans Past Due [Line Items]
Total past due		$ 14,464	$ 16,379

[1] Includes loans where the decision of foreclosure or similar alternative such as pursuit of deed-in-lieu of foreclosure has been reported.

[2] Loans that are 90 days or more past due or in the process of foreclosure expressed as a percentage of the recorded investment in the total loan portfolio class.

[3] Includes conventional mortgage loans with contractual principal or interest payments 90 days or more past due and not accruing interest as well as loans modified within the previous six months under our temporary loan modification plan.

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Allowance for credit losses - Individually Evaluated Impaired Loans (Details) - Conventional mortgage loans [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Individually evaluated impaired mortgage loans with no related allowance - Recorded Investment	$ 21,352		$ 22,945
Individually evaluated impaired mortgage loans with no related allowance - Par Value	21,311		$ 22,905
Individually evaluated impaired mortgage loans with no related allowance - Average Recorded Investment	21,699	$ 25,841
Individually evaluated impaired mortgage loans with no related allowance - Interest Income recognized	$ 116	$ 80

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Allowance for credit losses - Allowance Rollforward (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period		$ 650
(Reduction of) provision for credit losses		(51)	$ 11
Balance, end of period		625
Conventional mortgage loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period		650	1,025
Recoveries (charge-offs)		26	(11)
(Reduction of) provision for credit losses		(51)	11
Balance, end of period		625	1,025
Ending balance, individually evaluated for impairment		0	0
Ending balance, collectively evaluated for impairment		625	1,025
Recorded Investment Individually evaluated for impairment	[1]	21,352	25,316
Recorded Investment Collectively evaluated for impairment	[1]	$ 3,281,864	$ 3,151,522

[1] These amounts exclude government mortgage loans because we make no allowance for credit losses based on our investments in government mortgage loans, as discussed above under — Government Mortgage Loans Held for Portfolio.

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Derivatives and Hedging Activities Derivatives in Statement of Condition (Details) - USD ($)		Mar. 31, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives		$ 19,089,556,000	$ 19,965,133,000
Derivative Assets, before netting and collateral adjustments		60,554,000	55,078,000
Derivative Liabilities, before netting and collateral adjustments		(420,440,000)	(460,287,000)
Derivative Asset, netting adjustments, cash collateral and variation margin for daily settled contracts including related accrued interest	[1],[2]	(7,861,000)	6,520,000
Derivative Liability, netting adjustments, cash collateral and variation margin for daily settled contracts including related accrued interest	[1],[2]	95,357,000	102,411,000
Derivative Assets		52,693,000	61,598,000
Derivative Liabilities		(325,083,000)	(357,876,000)
Cash collateral and related accrued interest posted		57,700,000	109,800,000
Cash collateral and related accrued interest received		851,000	850,000
Variation margin for daily settled contracts		30,600,000
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives		17,952,229,000	18,743,609,000
Derivative Assets, before netting and collateral adjustments		58,357,000	52,715,000
Derivative Liabilities, before netting and collateral adjustments		(411,420,000)	(449,276,000)
Designated as Hedging Instrument [Member] | Interest-rate swaps [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives		17,424,429,000	18,215,809,000
Derivative Assets, before netting and collateral adjustments		58,357,000	52,715,000
Derivative Liabilities, before netting and collateral adjustments		(375,167,000)	(413,026,000)
Designated as Hedging Instrument [Member] | Forward-start interest-rate swaps [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives		527,800,000	527,800,000
Derivative Assets, before netting and collateral adjustments		0	0
Derivative Liabilities, before netting and collateral adjustments		(36,253,000)	(36,250,000)
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives		1,137,327,000	1,221,524,000
Derivative Assets, before netting and collateral adjustments		2,197,000	2,363,000
Derivative Liabilities, before netting and collateral adjustments		(9,020,000)	(11,011,000)
Not Designated as Hedging Instrument [Member] | Interest-rate swaps [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives		1,099,500,000	1,199,000,000
Derivative Assets, before netting and collateral adjustments		1,995,000	2,293,000
Derivative Liabilities, before netting and collateral adjustments		(9,011,000)	(10,840,000)
Mortgages [Member] | Mortgage-delivery commitments [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets		202,000	70,000
Derivative Liabilities		(9,000)	(171,000)
Mortgages [Member] | Not Designated as Hedging Instrument [Member] | Mortgage-delivery commitments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives	[3]	37,827,000	22,524,000
Derivative Assets, before netting and collateral adjustments	[3]	202,000	70,000
Derivative Liabilities, before netting and collateral adjustments	[3]	$ (9,000)	$ (171,000)

[1] Amounts represent the effect of master-netting agreements intended to allow us to settle positive and negative positions with the same counterparty. Cash collateral and related accrued interest posted was $57.7 million and $109.8 million at March 31, 2017, and December 31, 2016, respectively. The change in cash collateral posted is included in the net change in interest-bearing deposits in the statement of cash flows. Cash collateral and related accrued interest received was $851,000 and $850,000 at March 31, 2017, and December 31, 2016, respectively. Variation margin for daily settled contracts was $30.6 million at March 31, 2017.

[2] Carried at fair value on a recurring basis.

[3] Mortgage-delivery commitments are classified as derivatives with changes in fair value recorded in other income.

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Derivatives and Hedging Activities Derivatives in Statement of Income (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives and hedged items in fair-value hedging relationships		$ (659)	$ (3,033)
Total net losses related to derivatives designated as hedging instruments		(525)	(3,379)
Total net gains (losses) related to derivatives not designated as hedging instruments		510	(2,856)
Other	[1]	51	0
Net gains (losses) on derivatives and hedging activities		36	(6,235)
Interest-rate swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives and hedged items in fair-value hedging relationships		(659)	(3,033)
Total net gains (losses) related to derivatives not designated as hedging instruments		153	(3,472)
Forward-start interest-rate swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedge ineffectiveness		134	(346)
Mortgages [Member] | Mortgage-delivery commitments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses) related to derivatives not designated as hedging instruments		$ 357	$ 616

[1] Consists of price alignment amount on derivatives for which variation margin is characterized as a daily settlement amount.

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Derivatives and Hedging Activities Derivatives in Statement of Income and Impact on Interest (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) on Derivative		$ 31,439	$ (107,644)
Gain/(Loss) on Hedged Item		(32,098)	104,611
Net Fair-Value Hedge Ineffectiveness		(659)	(3,033)
Effect of Derivatives on Net Interest Income	[1]	(17,105)	(31,063)
Advances [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) on Derivative		21,095	(68,456)
Gain/(Loss) on Hedged Item		(20,453)	68,233
Net Fair-Value Hedge Ineffectiveness		642	(223)
Effect of Derivatives on Net Interest Income	[1]	(13,405)	(30,124)
Available-for-sale Securities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) on Derivative		10,268	(49,455)
Gain/(Loss) on Hedged Item		(9,808)	49,839
Net Fair-Value Hedge Ineffectiveness		460	384
Effect of Derivatives on Net Interest Income	[1]	(8,341)	(9,011)
COs - bonds [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) on Derivative		76	10,267
Gain/(Loss) on Hedged Item		(1,837)	(13,461)
Net Fair-Value Hedge Ineffectiveness		(1,761)	(3,194)
Effect of Derivatives on Net Interest Income	[1]	$ 4,641	$ 8,072

[1] The net interest on derivatives in fair-value hedge relationships is presented in the statement of operations as interest income or interest expense of the respective hedged item.

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Derivatives and Hedging Activities Cash Flow Hedge Activity (Details) - COs - bonds [Member] - Interest-rate swaps [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Derivative [Line Items]
Losses Recognized in Other Comprehensive Loss on Derivatives (Effective Portion)	$ (138)	$ (17,039)
Losses Reclassified from Accumulated Other Comprehensive Loss into Net Income (Effective Portion)	(4,315)	(7,208)
Gains (Losses) Recognized in Net Losses on Derivatives and Hedging Activities (Ineffective Portion)	$ 134	$ (346)

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Derivatives and Hedging Activities Narratives (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($)
Derivative [Line Items]
Maximum length of time which we are hedging our exposure to the variability in future cash flows for forecasted transactions	8 years
Deferred net losses on derivative accumulated in other comprehensive loss expected to be reclassified to earnings during the next 12 months	$ 7,200
Aggregate fair value of all uncleared derivative instruments with credit-risk-related contingent features that were in a net liability position	355,300
Post-haircut value of collateral already posted	324,700
Rating Downgrade from AAPlus to AA or AAMinus [Member]
Derivative [Line Items]
Incremental collateral	11,638	[1]
Rating Downgrade From AAMinus to APlus, A or AMinus [Member]
Derivative [Line Items]
Incremental collateral	12,399	[1]
Rating Downgrade From AMinus to below AMinus [Member]
Derivative [Line Items]
Incremental collateral	$ 16,808	[1]

[1] Ratings are expressed in this table according to S&P's conventions but include the equivalent of such rating by Moody's. If there is a split rating, the lower rating is used.

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Derivatives and Hedging Activities Fair Value of Derivative Instruments With or Without Legal Rights of Offset (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Derivative Asset, total gross recognized amount		$ 60,352	$ 55,008
Derivative Liability, total gross recognized amount		(420,431)	(460,116)
Derivative Assets, Netting Adjustments and Cash Collateral	[1],[2]	(7,861)	6,520
Derivative Liability, Netting Adjustments and Cash Collateral	[1],[2]	95,357	102,411
Derivative Asset, total net amounts after netting adjustments, cash collateral, and variation margin for daily settled contracts		52,491	61,528
Derivative Liability, total net amounts after netting adjustments, cash collateral, and variation margin for daily settled contracts		(325,074)	(357,705)
Derivative assets		52,693	61,598
Derivative liabilities		(325,083)	(357,876)
Derivative Assets, Total non-cash collateral received or pledged, not offset		0	0
Derivative Liabilities, Total non-cash collateral received or pledged, not offset	[3]	299,176	320,750
Derivative Asset, Fair value, amount offset against collateral		52,693	61,598
Derivative Liability, Fair value, amount offset against collateral		(25,907)	(37,126)
Derivative Liabilities, additional net exposure, collateral pledged to counterparties in excess of net liabilities		1,100	2,000
Mortgages [Member] | Mortgage-delivery commitments [Member]
Derivative [Line Items]
Derivative Asset, Mortgage delivery commitments		202	70
Derivative Liabilities, Mortgage delivery commitments		(9)	(171)
Derivative assets		202	70
Derivative liabilities		(9)	(171)
Derivative Asset, Fair value, amount offset against collateral		202	70
Derivative Liability, Fair value, amount offset against collateral		(9)	(171)
Uncleared derivatives [Member]
Derivative [Line Items]
Derivative Asset, total gross recognized amount		13,350	12,594
Derivative Liability, total gross recognized amount		(367,754)	(405,310)
Derivative Assets, Netting Adjustments and Cash Collateral		(12,518)	(12,028)
Derivative Liability, Netting Adjustments and Cash Collateral		42,680	47,605
Derivative Asset, total net amounts after netting adjustments, cash collateral, and variation margin for daily settled contracts		832	566
Derivative Liability, total net amounts after netting adjustments, cash collateral, and variation margin for daily settled contracts		(325,074)	(357,705)
Derivative assets		832	566
Derivative liabilities		(325,074)	(357,705)
Derivative Assets, fair value of securities pledged as collateral than can be sold or repledged		0	0
Derivative Liabilities, fair value of securities pledged as collateral that can be sold or repledged	[3]	21,063	30,306
Derivative Assets, fair value of securities pledged as collateral that cannot be sold or repledged		0	0
Derivative Liabilities, fair value of securities pledged as collateral that cannot be sold or repledged	[3]	278,113	290,444
Derivative Asset, Fair value, amount offset against collateral		832	566
Derivative Liability, Fair value, amount offset against collateral		(25,898)	(36,955)
Cleared derivatives [Member]
Derivative [Line Items]
Derivative Asset, total gross recognized amount		47,002	42,414
Derivative Liability, total gross recognized amount		(52,677)	(54,806)
Derivative Assets, Netting Adjustments and Cash Collateral		4,657	18,548
Derivative Liability, Netting Adjustments and Cash Collateral		52,677	54,806
Derivative Asset, total net amounts after netting adjustments, cash collateral, and variation margin for daily settled contracts		51,659	60,962
Derivative Liability, total net amounts after netting adjustments, cash collateral, and variation margin for daily settled contracts		0	0
Derivative assets		51,659	60,962
Derivative liabilities		0	0
Derivative Asset, Fair value, amount offset against collateral		51,659	60,962
Derivative Liability, Fair value, amount offset against collateral		$ 0	$ 0

[1] Amounts represent the effect of master-netting agreements intended to allow us to settle positive and negative positions with the same counterparty. Cash collateral and related accrued interest posted was $57.7 million and $109.8 million at March 31, 2017, and December 31, 2016, respectively. The change in cash collateral posted is included in the net change in interest-bearing deposits in the statement of cash flows. Cash collateral and related accrued interest received was $851,000 and $850,000 at March 31, 2017, and December 31, 2016, respectively. Variation margin for daily settled contracts was $30.6 million at March 31, 2017.

[2] Carried at fair value on a recurring basis.

[3] Includes non-cash collateral at fair value. Any overcollateralization with a counterparty is not included in the determination of the net amount. At March 31, 2017, and December 31, 2016, we had additional net credit exposure of $1.1 million and $2.0 million, respectively, due to instances where our collateral pledged to a counterparty exceeded our net derivative liability position.

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Deposits Narratives (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Deposits [Abstract]
Interest-bearing deposit demand and overnight	$ 465,931	$ 440,731
Interest-bearing deposit other	2,824	4,166
Non-interest bearing deposits other	21,513	37,266
Total deposits	$ 490,268	$ 482,163

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Consolidated Obligations CO Bonds - Year of Contractual Maturiry (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Schedule of Short-term and Long-term Debt [Line Items]
Due in one year or less		$ 11,252,735	$ 8,734,955
Due in one year or less, weighted average rate	[1]	1.37%	1.43%
Due after one year through two years		$ 6,436,440	$ 7,752,420
Due after one year through two years, weighted average rate	[1]	1.31%	1.19%
Due after two years through three years		$ 3,197,930	$ 3,297,120
Due after two years through three years, weighted average rate	[1]	1.71%	1.63%
Due after three years through four years		$ 1,361,695	$ 1,637,335
Due after three years through four years, weighted average rate	[1]	1.89%	1.87%
Due after four years through five years		$ 2,551,775	$ 2,574,375
Due after four years through five years, weighted average rate	[1]	1.68%	1.65%
Thereafter		$ 3,147,595	$ 3,135,745
Thereafter, weighted average rate	[1]	2.73%	2.70%
Total par value		$ 27,948,170	$ 27,131,950
Total par value, weighted average rate	[1]	1.60%	1.58%
Hedging adjustments		$ (61,917)	$ (63,755)
Total		27,978,423	27,171,434
COs - bonds [Member]
Schedule of Short-term and Long-term Debt [Line Items]
Premiums		106,776	118,145
Discounts		$ (14,606)	$ (14,906)

[1] The CO bonds' weighted-average rate excludes concession fees.

XML

Consolidated Obligations CO Bonds - Outstanding By Call Features (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of Short-term and Long-term Debt [Line Items]
Total par value	$ 27,948,170	$ 27,131,950
Noncallable and nonputable [Member]
Schedule of Short-term and Long-term Debt [Line Items]
Total par value	23,290,170	22,388,950
Callable [Member]
Schedule of Short-term and Long-term Debt [Line Items]
Total par value	$ 4,658,000	$ 4,743,000

XML

Consolidated Obligations CO Bonds - Year of Contractual Maturity or Next Call Date (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Debt Disclosure [Abstract]
Due in one year or less	$ 15,067,735	$ 12,858,955
Due after one year through two years	5,916,440	7,013,420
Due after two years through three years	2,979,930	2,904,120
Due after three years through four years	1,013,695	1,289,335
Due after four years through five years	1,284,775	1,242,375
Thereafter	1,685,595	1,823,745
Total par value	$ 27,948,170	$ 27,131,950

XML

Consolidated Obligations CO Bonds - Interest-Rate-Payment Type (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Debt Disclosure [Abstract]
Fixed-rate	$ 20,386,170	$ 20,289,950
Simple variable-rate	6,005,000	5,300,000
Step-up	1,557,000	1,542,000
Total par value	$ 27,948,170	$ 27,131,950

XML

Consolidated Obligations CO - Discount Notes (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Debt Disclosure [Abstract]
Federal Home Loan Bank, Consolidated Obligations, Discount Notes		$ 24,179,050	$ 30,053,964
Par value		$ 24,193,530	$ 30,070,103
Weighted Average Rate	[1]	0.65%	0.47%

[1] The CO discount notes' weighted-average rate represents a yield to maturity excluding concession fees.

XML

Affordable Housing Program Roll-forward AHP liability (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Affordable Housing Program [Roll Forward]
Balance at beginning of period	$ 81,627	$ 82,081	$ 82,081
AHP expense for the period	4,192	3,320	19,397
AHP direct grant disbursements	(5,385)	$ (1,990)	(18,575)
AHP subsidy for AHP advance disbursements	(267)		(1,378)
Return of previously disbursed grants and subsidies	3		102
Balance at end of period	$ 80,170		$ 81,627

XML

Capital Requirements (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Capital [Abstract]
Capital-to-asset ratio, Required	4.00%	4.00%
Leverage capital-to-assets ratio, Required	5.00%	5.00%
Multiplier for Determining Permanent Capital in Leverage Capital Calculation	1.5
Class B capital stock	$ 2,458,667	$ 2,411,306
Mandatorily redeemable capital stock	32,677	32,687
Retained earnings	1,230,766	1,216,986
Total permanent capital	3,722,110	3,660,979
Credit-risk capital	352,679	355,182
Market-risk capital	168,602	118,765
Operations-risk capital	156,385	142,184
Total risk-based capital requirement	677,666	616,131
Permanent capital in excess of risk-based capital requirement	3,044,444	3,044,848
Regulatory capital, Required	2,262,752	2,461,823
Leverage capital, Required	2,828,440	3,077,279
Risk-based capital, Actual	3,722,110	3,660,979
Regulatory capital, Actual	$ 3,722,110	$ 3,660,979
Capital-to-asset ratio, Actual	6.60%	5.90%
Leverage capital, Actual	$ 5,583,165	$ 5,491,469
Leverage capital-to-assets ratio, Actual	9.90%	8.90%

XML

Accumulated Other Comprehensive Loss (Details) - USD ($)		3 Months Ended
		Mar. 31, 2017		Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amortization of hedging activities recorded in interest expense CO bonds		$ 98,175,000		$ 90,860,000
Amortization of hedging activities recorded in losses on derivatives and hedging activities		36,000		(6,235,000)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance		(383,514,000)
Accretion of noncredit loss		8,296,000		9,141,000
Amortization - hedging activities		4,319,000		7,211,000
Amortization - pension and postretirement benefits		(194,000)		(119,000)
Other comprehensive income (loss)		39,942,000		52,167,000
Ending balance		(343,572,000)
Net Unrealized Loss Relating to Hedging Activities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance		(48,187,000)		(71,237,000)
Net unrealized gains (losses)		(138,000)		(17,039,000)
Amortization - hedging activities		4,319,000	[1]	7,211,000	[2]
Other comprehensive income (loss)		4,181,000		(9,828,000)
Ending balance		(44,006,000)		(81,065,000)
Pension and Postretirement Benefits [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance		(6,139,000)		(3,857,000)
Net actuarial gain				1,000
Amortization - pension and postretirement benefits	[3]	194,000		118,000
Other comprehensive income (loss)		194,000		119,000
Ending balance		(5,945,000)		(3,738,000)
Total Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance		(383,514,000)		(442,597,000)
Net unrealized gains (losses)		26,768,000		34,791,000
Noncredit other-than-temporary impairment losses				(8,000)
Accretion of noncredit loss		8,296,000		9,141,000
Net actuarial gain				1,000
Noncredit other-than-temporary impairment losses reclassified to credit loss	[4]	365,000		913,000
Amortization - hedging activities		4,319,000	[1]	7,211,000	[2]
Amortization - pension and postretirement benefits	[3]	194,000		118,000
Other comprehensive income (loss)		39,942,000		52,167,000
Ending balance		(343,572,000)		(390,430,000)
Available-for-sale Securities [Member] | Net Unrealized Losses on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance		(136,809,000)		(137,718,000)
Net unrealized gains (losses)		26,906,000		51,830,000
Other comprehensive income (loss)		26,906,000		51,830,000
Ending balance		(109,903,000)		(85,888,000)
Held-to-maturity Securities [Member] | Noncredit Portion of Other-Than-Temporary Impairment Losses on Held-to-Maturity Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance		(192,379,000)		(229,785,000)
Noncredit other-than-temporary impairment losses				(8,000)
Accretion of noncredit loss		8,296,000		9,141,000
Noncredit other-than-temporary impairment losses reclassified to credit loss	[4]	365,000		913,000
Other comprehensive income (loss)		8,661,000		10,046,000
Ending balance		(183,718,000)		(219,739,000)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amortization of hedging activities recorded in interest expense CO bonds		4,300,000		7,200,000
Amortization of hedging activities recorded in losses on derivatives and hedging activities		$ 4,000		$ 4,000

[1] Amortization of hedging activities includes $4.3 million recorded in CO bond interest expense and $4,000 recorded in net gains (losses) on derivatives and hedging activities in the statement of operations.

[2] Amortization of hedging activities includes $7.2 million recorded in CO bond interest expense and $4,000 recorded in net gains (losses) on derivatives and hedging activities in the statement of operations.

[3] Recorded in other operating expenses in the statement of operations.

[4] Recorded in net amount of impairment losses reclassified to (from) accumulated other comprehensive loss in the statement of operations.

XML

Fair Values Carrying Value and Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		$ 12,817	$ 520,031
Trading securities		516,150	612,622
Available-for-sale securities Fair Value		6,299,801	6,588,664
Held-to-maturity securities	[1],[2]	2,004,511	2,130,767
Held-to-maturity securities Fair Value		2,249,437	2,372,290
Accrued interest receivable		78,816	84,653
Derivative assets		52,693	61,598
Derivative Assets, Netting Adjustments and Cash Collateral	[3],[4]	(7,861)	6,520
Mandatorily redeemable capital stock		(32,677)	(32,687)
Accrued interest payable		(100,964)	(80,822)
Derivative liabilities		(325,083)	(357,876)
Derivative Liability, Netting Adjustments and Cash Collateral	[3],[4]	95,357	102,411
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		12,817	520,031
Interest-bearing deposits		246,317	278
Securities purchased under agreements to resell		0	0
Federal funds sold		0	0
Trading securities	[4]	0	0
Available-for-sale securities Fair Value	[4]	0	0
Held-to-maturity securities Fair Value		0	0
Advances		0	0
Mortgage loans, net		0	0
Accrued interest receivable		0	0
Derivative assets	[4]	0	0
Other assets	[4]	11,652	8,394
Deposits		0	0
Mandatorily redeemable capital stock		(32,677)	(32,687)
Accrued interest payable		0	0
Derivative liabilities	[4]	0	0
Level 1 [Member] | Commitments to extend credit for advances [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		0	0
Level 1 [Member] | Standby letters of credit [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		0	0
Level 1 [Member] | COs - Discount notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Discount notes		0	0
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		0	0
Interest-bearing deposits		0	0
Securities purchased under agreements to resell		2,998,891	5,998,799
Federal funds sold		5,149,928	2,699,949
Trading securities	[4]	516,150	612,622
Available-for-sale securities Fair Value	[4]	6,291,617	6,580,518
Held-to-maturity securities Fair Value		1,082,230	1,176,269
Advances		35,643,128	39,273,044
Mortgage loans, net		3,682,550	3,708,123
Accrued interest receivable		78,816	84,653
Derivative assets	[4]	60,554	55,078
Other assets	[4]	9,394	9,385
Deposits		(490,263)	(482,158)
Mandatorily redeemable capital stock		0	0
Accrued interest payable		(100,964)	(80,822)
Derivative liabilities	[4]	(420,440)	(460,287)
Level 2 [Member] | Commitments to extend credit for advances [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		(4,811)	(4,412)
Level 2 [Member] | Standby letters of credit [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		(1,040)	(1,064)
Level 2 [Member] | COs - Discount notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Discount notes		(24,177,609)	(30,054,085)
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		0	0
Interest-bearing deposits		0	0
Securities purchased under agreements to resell		0	0
Federal funds sold		0	0
Trading securities	[4]	0	0
Available-for-sale securities Fair Value	[4]	8,184	8,146
Held-to-maturity securities Fair Value		1,167,207	1,196,021
Advances		0	0
Mortgage loans, net		26,102	28,425
Accrued interest receivable		0	0
Derivative assets	[4]	0	0
Other assets	[4]	0	0
Deposits		0	0
Mandatorily redeemable capital stock		0	0
Accrued interest payable		0	0
Derivative liabilities	[4]	0	0
Level 3 [Member] | Commitments to extend credit for advances [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		0	0
Level 3 [Member] | Standby letters of credit [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		0	0
Level 3 [Member] | COs - Discount notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Discount notes		0	0
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		12,817	520,031
Interest-bearing deposits		246,317	278
Securities purchased under agreements to resell		2,999,000	5,999,000
Federal funds sold		5,150,000	2,700,000
Trading securities	[4]	516,150	612,622
Available-for-sale securities Fair Value	[4]	6,299,801	6,588,664
Held-to-maturity securities		2,004,511	2,130,767
Advances		35,479,424	39,099,339
Mortgage loans, net		3,675,598	3,693,894
Accrued interest receivable		78,816	84,653
Derivative assets	[4]	52,693	61,598
Other assets	[4]	21,046	17,779
Deposits		(490,268)	(482,163)
Mandatorily redeemable capital stock		(32,677)	(32,687)
Accrued interest payable		(100,964)	(80,822)
Derivative liabilities	[4]	(325,083)	(357,876)
Carrying Value [Member] | Commitments to extend credit for advances [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		0	0
Carrying Value [Member] | Standby letters of credit [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		(1,040)	(1,064)
Carrying Value [Member] | COs - Discount notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Discount notes		(24,179,050)	(30,053,964)
Total Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		12,817	520,031
Interest-bearing deposits		246,317	278
Securities purchased under agreements to resell		2,998,891	5,998,799
Federal funds sold		5,149,928	2,699,949
Trading securities	[4]	516,150	612,622
Available-for-sale securities Fair Value	[4]	6,299,801	6,588,664
Held-to-maturity securities Fair Value		2,249,437	2,372,290
Advances		35,643,128	39,273,044
Mortgage loans, net		3,708,652	3,736,548
Accrued interest receivable		78,816	84,653
Derivative assets	[4]	52,693	61,598
Other assets	[4]	21,046	17,779
Deposits		(490,263)	(482,158)
Mandatorily redeemable capital stock		(32,677)	(32,687)
Accrued interest payable		(100,964)	(80,822)
Derivative liabilities	[4]	(325,083)	(357,876)
Total Fair Value [Member] | Commitments to extend credit for advances [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		(4,811)	(4,412)
Total Fair Value [Member] | Standby letters of credit [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		(1,040)	(1,064)
Total Fair Value [Member] | COs - Discount notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Discount notes		(24,177,609)	(30,054,085)
COs - bonds [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Bonds		0	0
COs - bonds [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Bonds		(28,100,611)	(27,298,499)
COs - bonds [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Bonds		0	0
COs - bonds [Member] | Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Bonds		(27,978,423)	(27,171,434)
COs - bonds [Member] | Total Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Bonds		$ (28,100,611)	$ (27,298,499)

[1] Carrying value of held-to-maturity securities represents the sum of amortized cost and the amount of noncredit-related other-than-temporary impairment recognized in accumulated other comprehensive loss.

[2] Fair values of held-to-maturity securities were $2,249,437 and $2,372,290 at March 31, 2017, and December 31, 2016, respectively.

[3] Amounts represent the effect of master-netting agreements intended to allow us to settle positive and negative positions with the same counterparty. Cash collateral and related accrued interest posted was $57.7 million and $109.8 million at March 31, 2017, and December 31, 2016, respectively. The change in cash collateral posted is included in the net change in interest-bearing deposits in the statement of cash flows. Cash collateral and related accrued interest received was $851,000 and $850,000 at March 31, 2017, and December 31, 2016, respectively. Variation margin for daily settled contracts was $30.6 million at March 31, 2017.

[4] Carried at fair value on a recurring basis.

XML

Fair Values Fair Value Measured on Recurring Basis (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		$ 516,150	$ 612,622
Available-for-sale securities Fair Value		6,299,801	6,588,664
Derivative assets		52,693	61,598
Derivative Assets, Netting Adjustments and Cash Collateral	[1],[2]	(7,861)	6,520
Derivative liabilities		(325,083)	(357,876)
Derivative Liability, Netting Adjustments and Cash Collateral	[1],[2]	95,357	102,411
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	[2]	0	0
Available-for-sale securities Fair Value	[2]	0	0
Derivative assets	[2]	0	0
Other assets	[2]	11,652	8,394
Derivative liabilities	[2]	0	0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	[2]	516,150	612,622
Available-for-sale securities Fair Value	[2]	6,291,617	6,580,518
Derivative assets	[2]	60,554	55,078
Other assets	[2]	9,394	9,385
Derivative liabilities	[2]	(420,440)	(460,287)
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	[2]	0	0
Available-for-sale securities Fair Value	[2]	8,184	8,146
Derivative assets	[2]	0	0
Other assets	[2]	0	0
Derivative liabilities	[2]	0	0
Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Netting Adjustments and Cash Collateral	[3]	(7,861)	6,520
Derivative Liability, Netting Adjustments and Cash Collateral	[3]	95,357	102,411
Recurring [Member] | Interest-rate swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Netting Adjustments and Cash Collateral	[3]	(7,861)	6,520
Derivative Liability, Netting Adjustments and Cash Collateral	[3]	95,357	102,411
Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0	0
Available-for-sale securities Fair Value		0	0
Derivative assets		0	0
Other assets		11,652	8,394
Total assets at fair value		11,652	8,394
Total liabilities at fair value		0	0
Recurring [Member] | Level 1 [Member] | Interest-rate swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0	0
Derivative liabilities		0	0
Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		516,150	612,622
Available-for-sale securities Fair Value		6,291,617	6,580,518
Derivative assets		60,554	55,078
Other assets		9,394	9,385
Total assets at fair value		6,877,715	7,257,603
Total liabilities at fair value		(420,440)	(460,287)
Recurring [Member] | Level 2 [Member] | Interest-rate swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		60,352	55,008
Derivative liabilities		(420,431)	(460,116)
Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0	0
Available-for-sale securities Fair Value		8,184	8,146
Derivative assets		0	0
Other assets		0	0
Total assets at fair value		8,184	8,146
Total liabilities at fair value		0	0
Recurring [Member] | Level 3 [Member] | Interest-rate swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0	0
Derivative liabilities		0	0
Estimate of Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	[2]	516,150	612,622
Available-for-sale securities Fair Value	[2]	6,299,801	6,588,664
Derivative assets	[2]	52,693	61,598
Other assets	[2]	21,046	17,779
Derivative liabilities	[2]	(325,083)	(357,876)
Estimate of Fair Value Measurement [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		516,150	612,622
Available-for-sale securities Fair Value		6,299,801	6,588,664
Derivative assets		52,693	61,598
Other assets		21,046	17,779
Total assets at fair value		6,889,690	7,280,663
Total liabilities at fair value		(325,083)	(357,876)
Estimate of Fair Value Measurement [Member] | Recurring [Member] | Interest-rate swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		52,491	61,528
Derivative liabilities		(325,074)	(357,705)
U.S. Treasury obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		308,698	399,521
U.S. Treasury obligations [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0	0
U.S. Treasury obligations [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		308,698	399,521
U.S. Treasury obligations [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0	0
U.S. Treasury obligations [Member] | Estimate of Fair Value Measurement [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		308,698	399,521
U.S. government-guaranteed - single-family MBS [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		8,050	8,494
Available-for-sale securities Fair Value		117,678	124,727
U.S. government-guaranteed - single-family MBS [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0	0
Available-for-sale securities Fair Value		0	0
U.S. government-guaranteed - single-family MBS [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		8,050	8,494
Available-for-sale securities Fair Value		117,678	124,727
U.S. government-guaranteed - single-family MBS [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0	0
Available-for-sale securities Fair Value		0	0
U.S. government-guaranteed - single-family MBS [Member] | Estimate of Fair Value Measurement [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		8,050	8,494
Available-for-sale securities Fair Value		117,678	124,727
U.S. government guaranteed - multifamily MBS [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		510,132	563,361
U.S. government guaranteed - multifamily MBS [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
U.S. government guaranteed - multifamily MBS [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		510,132	563,361
U.S. government guaranteed - multifamily MBS [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
U.S. government guaranteed - multifamily MBS [Member] | Estimate of Fair Value Measurement [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		510,132	563,361
HFA securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		8,184	8,146
HFA securities [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
HFA securities [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
HFA securities [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		8,184	8,146
HFA securities [Member] | Estimate of Fair Value Measurement [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		8,184	8,146
Supranational institutions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		422,339	422,620
Supranational institutions [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
Supranational institutions [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		422,339	422,620
Supranational institutions [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
Supranational institutions [Member] | Estimate of Fair Value Measurement [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		422,339	422,620
U.S. government-owned corporations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		276,616	271,957
U.S. government-owned corporations [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
U.S. government-owned corporations [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		276,616	271,957
U.S. government-owned corporations [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
U.S. government-owned corporations [Member] | Estimate of Fair Value Measurement [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		276,616	271,957
GSEs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		118,344	117,468
GSEs [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
GSEs [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		118,344	117,468
GSEs [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
GSEs [Member] | Estimate of Fair Value Measurement [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		118,344	117,468
Single Family [Member] | Government Sponsored Enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		644	768
Available-for-sale securities Fair Value		4,175,508	4,403,855
Single Family [Member] | Government Sponsored Enterprises [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0	0
Available-for-sale securities Fair Value		0	0
Single Family [Member] | Government Sponsored Enterprises [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		644	768
Available-for-sale securities Fair Value		4,175,508	4,403,855
Single Family [Member] | Government Sponsored Enterprises [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0	0
Available-for-sale securities Fair Value		0	0
Single Family [Member] | Government Sponsored Enterprises [Member] | Estimate of Fair Value Measurement [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		644	768
Available-for-sale securities Fair Value		4,175,508	4,403,855
Multifamily [Member] | Government Sponsored Enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		198,758	203,839
Available-for-sale securities Fair Value		671,000	676,530
Multifamily [Member] | Government Sponsored Enterprises [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0	0
Available-for-sale securities Fair Value		0	0
Multifamily [Member] | Government Sponsored Enterprises [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		198,758	203,839
Available-for-sale securities Fair Value		671,000	676,530
Multifamily [Member] | Government Sponsored Enterprises [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0	0
Available-for-sale securities Fair Value		0	0
Multifamily [Member] | Government Sponsored Enterprises [Member] | Estimate of Fair Value Measurement [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		198,758	203,839
Available-for-sale securities Fair Value		671,000	676,530
Mortgages [Member] | Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		202	70
Derivative liabilities		(9)	(171)
Mortgages [Member] | Recurring [Member] | Level 1 [Member] | Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0	0
Derivative liabilities		0	0
Mortgages [Member] | Recurring [Member] | Level 2 [Member] | Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		202	70
Derivative liabilities		(9)	(171)
Mortgages [Member] | Recurring [Member] | Level 3 [Member] | Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0	0
Derivative liabilities		0	0
Mortgages [Member] | Estimate of Fair Value Measurement [Member] | Recurring [Member] | Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		202	70
Derivative liabilities		$ (9)	$ (171)

[1] Amounts represent the effect of master-netting agreements intended to allow us to settle positive and negative positions with the same counterparty. Cash collateral and related accrued interest posted was $57.7 million and $109.8 million at March 31, 2017, and December 31, 2016, respectively. The change in cash collateral posted is included in the net change in interest-bearing deposits in the statement of cash flows. Cash collateral and related accrued interest received was $851,000 and $850,000 at March 31, 2017, and December 31, 2016, respectively. Variation margin for daily settled contracts was $30.6 million at March 31, 2017.

[2] Carried at fair value on a recurring basis.

[3] These amounts represent the application of the netting requirements which allow us to settle positive and negative positions and also cash collateral and related accrued interest held or placed with the same clearing member and/or counterparty.

XML

Estimated Fair Value Level 3 Reconciliation - Roll Forward (Details) - Level 3 [Member] - Recurring [Member] - Available-for-sale Securities [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 8,146
Purchases	0
Unrealized gains included in other comprehensive income	38
Balance at end of period	$ 8,184

XML

Fair Values Fair Value Measured on Nonrecurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of held-to-maturity securities	$ 2,249,437	$ 2,372,290
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of held-to-maturity securities	0	0
Mortgage loans held for portfolio	0	0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of held-to-maturity securities	1,082,230	1,176,269
Mortgage loans held for portfolio	3,682,550	3,708,123
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of held-to-maturity securities	1,167,207	1,196,021
Mortgage loans held for portfolio	26,102	28,425
Fair Value, Measurements, Nonrecurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for portfolio	0	0
REO	0	0
Total assets recorded at fair value on a nonrecurring basis	0	0
Fair Value, Measurements, Nonrecurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for portfolio	0	0
REO	0	0
Total assets recorded at fair value on a nonrecurring basis	0	0
Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for portfolio	5,145	5,618
REO	544	786
Total assets recorded at fair value on a nonrecurring basis	10,953	14,902
Estimate of Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of held-to-maturity securities	2,249,437	2,372,290
Mortgage loans held for portfolio	3,708,652	3,736,548
Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for portfolio	5,145	5,618
REO	544	786
Total assets recorded at fair value on a nonrecurring basis	10,953	14,902
Residential Mortgage Backed Securities [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of held-to-maturity securities	1,010,545	1,039,790
Residential Mortgage Backed Securities [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member] | Fair Value, Measurements, Nonrecurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of held-to-maturity securities	0	0
Residential Mortgage Backed Securities [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member] | Fair Value, Measurements, Nonrecurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of held-to-maturity securities	0	0
Residential Mortgage Backed Securities [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member] | Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of held-to-maturity securities	5,264	8,498
Residential Mortgage Backed Securities [Member] | Estimate of Fair Value Measurement [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of held-to-maturity securities	$ 5,264	$ 8,498

XML

Commitments and Contingencies (Details) - USD ($)		3 Months Ended
		Mar. 31, 2017	Dec. 31, 2016
Loss Contingencies [Line Items]
Final expiration date of standby letters of credit		2026
Value of the guarantees related to standby letters of credit		$ 36,306,000	$ 40,235,000
Maximum term of commitments to invest in mortgage loans		45 days
Other FHLBanks [Member]
Loss Contingencies [Line Items]
Par value of other FHLBanks' outstanding COs for which we are jointly and severally liable		$ 907,100,000,000	932,100,000,000
Standby Letters of Credit Issuance Commitments [Member]
Loss Contingencies [Line Items]
Off-balance-sheet Commitments Expiring Within One Year		$ 44,100,000	2,700,000
Off-balance-sheet Commitments Expiring After One Year			285,000
Maximum [Member]
Loss Contingencies [Line Items]
Term of standby letters of credit		20 years
Standby letters of credit outstanding [Member]
Loss Contingencies [Line Items]
Off-balance-sheet Commitments Expiring Within One Year	[1]	$ 4,472,318,000	4,050,447,000
Off-balance-sheet Commitments Expiring After One Year	[1]	174,997,000	179,632,000
Total Off-balance Sheet Commitments	[1]	4,647,315,000	4,230,079,000
Value of the guarantees related to standby letters of credit		1,000,000	1,100,000
Commitments of unused lines of credit - advances [Member]
Loss Contingencies [Line Items]
Off-balance-sheet Commitments Expiring Within One Year	[2]	1,261,985,000	1,255,140,000
Off-balance-sheet Commitments Expiring After One Year	[2]	0	0
Total Off-balance Sheet Commitments	[2]	$ 1,261,985,000	1,255,140,000
Commitments of unused lines of credit - advances [Member] | Maximum [Member]
Loss Contingencies [Line Items]
Period for commitments for unused line-of-credit advances		12 months
Commitments to make additional advances [Member]
Loss Contingencies [Line Items]
Off-balance-sheet Commitments Expiring Within One Year		$ 33,928,000	44,865,000
Off-balance-sheet Commitments Expiring After One Year		73,193,000	65,972,000
Total Off-balance Sheet Commitments		107,121,000	110,837,000
Commitments to Invest in mortgage loans [Member]
Loss Contingencies [Line Items]
Off-balance-sheet Commitments Expiring Within One Year		37,827,000	22,524,000
Off-balance-sheet Commitments Expiring After One Year		0	0
Total Off-balance Sheet Commitments		37,827,000	22,524,000
Unsettled CO bonds, at par [Member]
Loss Contingencies [Line Items]
Off-balance-sheet Commitments Expiring Within One Year		70,750,000	0
Off-balance-sheet Commitments Expiring After One Year		0	0
Total Off-balance Sheet Commitments		$ 70,750,000	$ 0

[1] The amount of standby letters of credit outstanding excludes commitments to issue standby letters of credit that expire within one year. At March 31, 2017, and December 31, 2016, these amounts totaled $44.1 million and $2.7 million, respectively. Also excluded are commitments to issue standby letters of credit that expire after one year totaling $285,000 at December 31, 2016.

[2] Commitments for unused line-of-credit advances are generally for periods of up to 12 months. Since many of these commitments are not expected to be drawn upon, the total commitment amount does not necessarily indicate future liquidity requirements.

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Transactions with Shareholders (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Transactions with Shareholders [Line Items]
Capital Stock Outstanding	$ 2,458,667		$ 2,411,306
Par Value of Advances	35,520,010		39,114,855
Total Accrued Interest Receivable	78,816		84,653
Interest income on advances	106,583	$ 78,219
Fees on letters of credit	2,012	1,968
Citizens Bank, N.A. [Member]
Transactions with Shareholders [Line Items]
Capital Stock Outstanding	$ 352,223		$ 357,508
Percent of Total Capital Stock Outstanding	14.10%		14.60%
Par Value of Advances	$ 5,260,581		$ 7,260,446
Percentage of Total Par Value of Advances	14.80%		18.60%
Total Accrued Interest Receivable	$ 2,345		$ 2,625
Percent of Total Accrued Interest Receivable on Advances	6.20%		7.30%
Interest income on advances	$ 14,111	8,204
Fees on letters of credit	745	$ 840
Directors' Financial Institutions [Member]
Transactions with Shareholders [Line Items]
Capital Stock Outstanding	$ 82,433		$ 91,374
Percent of Total Capital Stock Outstanding	3.30%		3.70%
Par Value of Advances	$ 1,319,925		$ 1,554,753
Percentage of Total Par Value of Advances	3.70%		4.00%
Total Accrued Interest Receivable	$ 1,564		$ 1,631
Percent of Total Accrued Interest Receivable on Advances	4.20%		4.50%
Minimum [Member]
Transactions with Shareholders [Line Items]
Definition of shareholder concentration, minimum percent	10.00%

XML

Subsequent Events Subsequent Events (Details) - USD ($) $ in Thousands			3 Months Ended
	May 02, 2017	Apr. 03, 2017	Mar. 31, 2017	Mar. 31, 2016	Apr. 18, 2017
Subsequent Event [Line Items]
Excess capital stock repurchased			$ 134,586	$ 105,313
Common Class B [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Excess capital stock repurchased		$ 180,200
Annualized rate of cash dividends					4.08%
Dividend, including dividends on mandatorily redeemable capital stock	$ 25,200