Statements of Operations - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
INTEREST INCOME
Advances		$ 854,599	$ 867,215	$ 514,176
Prepayment fees on advances, net		35,011	216	898
Interest-bearing deposits		22,390	5,433	2,045
Securities purchased under agreements to resell		123,438	77,718	27,486
Federal funds sold		58,015	108,144	58,642
Investment securities:
Trading securities		22,037	8,789	10,604
Available-for-sale securities		115,942	143,952	118,270
Held-to-maturity securities		65,758	77,892	79,723
Total investment securities		203,737	230,633	208,597
Mortgage loans held for portfolio		147,885	136,672	125,002
Other		25	22	43
Total interest income		1,445,100	1,426,053	936,889
Consolidated obligations:
Bonds		598,585	545,228	421,622
Discount notes		569,896	561,443	233,081
Total consolidated obligations		1,168,481	1,106,671	654,703
Deposits		6,582	5,311	3,615
Mandatorily redeemable capital stock		974	1,923	1,558
Other borrowings		37	38	10
Total interest expense		1,176,074	1,113,943	659,886
NET INTEREST INCOME		269,026	312,110	277,003
Provision for (reduction of ) credit losses		85	(34)	(96)
NET INTEREST INCOME AFTER PROVISION FOR (REDUCTION OF) CREDIT LOSSES		268,941	312,144	277,099
OTHER INCOME (LOSS)
Net other-than-temporary impairment losses on investment securities, credit portion		(1,212)	(532)	(1,454)
Litigation settlements		29,361	12,769	20,761
Loss on early extinguishment of debt		(15,238)	0	0
Service fees		12,987	10,268	8,697
Net unrealized gains (losses) on trading securities		1,287	(4,515)	(6,078)
Net gains on derivatives and hedging activities		1,419
Net gains on derivatives and hedging activities			2,336	551
Realized net gain from sale of held-to-maturity securities	[1]	12,031	0	0
Other		349	500	435
Total other income		40,984	20,826	22,912
OTHER EXPENSE
Compensation and benefits		47,263	47,681	46,799
Other operating expenses		25,017	24,243	24,342
Federal Housing Finance Agency (the FHFA)		3,914	3,582	3,800
Office of Finance		3,468	3,526	3,260
Other		18,222	12,870	10,300
Total other expense		97,884	91,902	88,501
INCOME BEFORE ASSESSMENTS		212,041	241,068	211,510
AHP assessments		21,302	24,299	21,307
NET INCOME		$ 190,739	$ 216,769	$ 190,203

[1] The securities sold had less than 15 percent of the acquired principal outstanding at the time of the sale. Such sales are treated as maturities for the purposes of security classification. The sale does not impact our ability and intent to hold the remaining investments classified as held-to-maturity through their stated maturity dates.