Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2017

Accounting Policies [Abstract]

Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]

	As of and for the Three Months Ended June 30, 2016
(In thousands)	Previous Method		New Method		Effect of Change
Statements of Income:
Interest income - mortgage loans held for portfolio	$	58,433	$	64,008	$	5,575
Net interest income	77,035		82,610		5,575
Income before assessments	62,754		68,329		5,575
Affordable Housing Program assessments	6,378		6,936		558
Net income	56,376		61,393		5,017
Statements of Comprehensive Income:
Net income	$	56,376	$	61,393	$	5,017
Comprehensive income	56,927		61,944		5,017

	As of and for the Six Months Ended June 30, 2016
(In thousands)	Previous Method		New Method		Effect of Change
Statements of Condition:
Mortgage loans held for portfolio, net	$	8,509,933	$	8,496,646	$	(13,287	)
Total assets	106,141,555		106,128,268		(13,287		)
Affordable Housing Program payable	99,600		101,065		1,465
Total liabilities	101,143,798		101,145,263		1,465
Retained earnings:
Unrestricted	552,949		538,351		(14,598		)
Restricted	230,382		230,228		(154		)
Total retained earnings	783,331		768,579		(14,752		)
Total capital	4,997,757		4,983,005		(14,752		)
Total liabilities and capital	106,141,555		106,128,268		(13,287		)
Statements of Income:
Interest income - mortgage loans held for portfolio	$	117,248	$	131,892	$	14,644
Net interest income	156,811		171,455		14,644
Income before assessments	116,591		131,235		14,644
Affordable Housing Program assessments	11,868		13,333		1,465
Net income	104,723		117,902		13,179
Statements of Comprehensive Income:
Net income	$	104,723	$	117,902	$	13,179
Comprehensive income	105,890		119,069		13,179
Statements of Capital:
Total retained earnings, as of December 31, 2015	$	765,577	$	737,646	$	(27,931	)
Total comprehensive income	105,890		119,069		13,179
Total retained earnings, as of June 30, 2016	783,331		768,579		(14,752		)
Total capital	4,997,757		4,983,005		(14,752		)
Statements of Cash Flows:
Operating activities:
Net income	$	104,723	$	117,902	$	13,179
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	43,227		28,583		(14,644		)
Changes in:
Other liabilities	2,475		3,940		1,465
Total adjustments	53,970		40,791		(13,179		)
Net cash provided by operating activities	158,693		158,693		—