Consolidated Obligations (Tables)

6 Months Ended

Jun. 30, 2017

Debt Disclosure [Abstract]

Schedule of Short-term Debt [Table Text Block]

Consolidated Discount Notes Outstanding (dollars in thousands)

	Book Value		Par Value		Weighted Average Interest Rate (1)
June 30, 2017	$	49,359,582	$	49,416,627	0.97	%
December 31, 2016	$	44,689,662	$	44,710,521	0.46	%

(1) Represents an implied rate without consideration of concessions.

Schedule of Maturities of Long-term Debt [Table Text Block]

Consolidated Bonds Outstanding by Contractual Maturity (dollars in thousands)

	June 30, 2017					December 31, 2016
Year of Contractual Maturity	Amount			Weighted Average Interest Rate		Amount			Weighted Average Interest Rate
Due in 1 year or less	$	24,708,175		1.10	%	$	20,970,750		0.87	%
Due after 1 year through 2 years	9,016,640			1.35		12,811,000			1.12
Due after 2 years through 3 years	4,816,000			1.95		4,359,000			1.81
Due after 3 years through 4 years	5,045,000			1.80		3,566,000			1.95
Due after 4 years through 5 years	3,341,000			2.27		4,970,000			1.87
Thereafter	6,398,000			2.68		6,496,000			2.65
Total par value	53,324,815			1.55		53,172,750			1.39
Premiums	92,432					84,275
Discounts	(30,506		)			(32,804		)
Hedging adjustments	(3,458		)			(2,865		)
Fair value option valuation adjustment and    accrued interest	(23,974		)			(30,490		)
Total	$	53,359,309				$	53,190,866

Schedule Of Consolidated Obligation Bonds By Call Feature [Table Text Block]

Consolidated Bonds Outstanding by Call Features (in thousands)

	June 30, 2017		December 31, 2016
Par value of Consolidated Bonds:
Non-callable	$	47,032,815	$	46,007,750
Callable	6,292,000		7,165,000
Total par value	$	53,324,815	$	53,172,750

Schedule Of Maturities of Consolidated Obligation Bonds By Contractual Or Next Call Date [Table Text Block]

Consolidated Bonds Outstanding by Contractual Maturity or Next Call Date (in thousands)

Year of Contractual Maturity or Next Call Date	June 30, 2017		December 31, 2016
Due in 1 year or less	$	30,538,175	$	26,489,750
Due after 1 year through 2 years	8,354,640		12,006,000
Due after 2 years through 3 years	3,930,000		3,894,000
Due after 3 years through 4 years	4,065,000		2,805,000
Due after 4 years through 5 years	2,551,000		3,964,000
Thereafter	3,886,000		4,014,000
Total par value	$	53,324,815	$	53,172,750

Schedule Of Consolidated Obligation Bonds By Interest Rate Payment Terms [Table Text Block]

Consolidated Bonds by Interest-rate Payment Type (in thousands)

	June 30, 2017		December 31, 2016
Par value of Consolidated Bonds:
Fixed-rate	$	33,294,815	$	34,682,750
Variable-rate	20,030,000		18,290,000
Step-up	—		200,000
Total par value	$	53,324,815	$	53,172,750