Federal Home Loan Bank of Indianapolis 10-Q 7 Nov 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2014	Oct. 31, 2014
Entity Information [Line Items]	'	'
Entity Registrant Name	'Federal Home Loan Bank of Indianapolis	'
Entity Central Index Key	'0001331754	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Non-accelerated Filer	'
Document Type	'10-Q	'
Document Period End Date	30-Sep-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'
Amendment Flag	'false	'
Entity Common Stock, Common B Shares Outstanding	'	17,533,151

Statements_of_Condition_Unaudi

Statements of Condition (Unaudited) (USD $)	Sep. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Assets:	'		'
Cash and Due from Banks	$4,444,619		$3,318,564
Interest-Bearing Deposits	285		485
Available-for-Sale Securities (Notes 3 and 5)	3,574,036		3,632,835
Held-to-Maturity Securities (Estimated Fair Values of $7,190,400 and $7,244,318, respectively) (Notes 4 and 5)	7,072,395	[1]	7,146,250	[1]
Advances (Note 6)	19,324,702		17,337,418
Mortgage Loans Held for Portfolio, net of allowance for loan losses of $(3,000) and $(4,500), respectively (Notes 7 and 8)	6,471,714		6,189,804
Accrued Interest Receivable	79,329		79,072
Premises, Software, and Equipment, net	37,878		36,278
Derivative Assets, net (Note 9)	18,989		7,214
Other Assets	14,208		38,270
Total Assets	41,038,155		37,786,190
Liabilities:	'		'
Deposits	1,020,313		1,066,632
Consolidated Obligations (Note 10):	'		'
Discount Notes	10,105,640		7,434,890
Bonds	26,914,095		26,583,925
Total Consolidated Obligations	37,019,735		34,018,815
Accrued Interest Payable	82,089		80,757
Affordable Housing Program Payable (Note 11)	41,685		42,778
Derivative Liabilities, net (Note 9)	92,009		109,744
Mandatorily Redeemable Capital Stock (Note 12)	16,137		16,787
Other Liabilities	183,096		67,074
Total Liabilities	38,455,064		35,402,587
Commitments and Contingencies (Note 16)	'		'
Capital (Note 12):	'		'
Total Capital Stock Putable	1,725,686		1,609,931
Retained Earnings:	'		'
Unrestricted	694,433		666,515
Restricted	105,548		85,437
Total Retained Earnings	799,981		751,952
Total Accumulated Other Comprehensive Income (Note 13)	57,424		21,720
Total Capital	2,583,091		2,383,603
Total Liabilities and Capital	41,038,155		37,786,190
Class B-1 issued and outstanding shares: 17,223 and 16,058, respectively [Member]	'		'
Capital (Note 12):	'		'
Total Capital Stock Putable	1,722,322		1,605,796
Class B-2 issued and outstanding shares: 34 and 41, respectively [Member]	'		'
Capital (Note 12):	'		'
Total Capital Stock Putable	$3,364		$4,135
[1]	Represents amortized cost after adjustment for non-credit OTTI recognized in AOCI.

Statements_of_Condition_Unaudi1

Statements of Condition (Unaudited) (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, except Per Share data, unless otherwise specified
HTM Securities	$7,190,400	$7,244,318
Common stock putable, par value per share	$100	$100
Allowance for loan losses	($3,000)	($4,500)
Class B-1 [Member]	'	'
Common stock issued (in shares)	17,223	16,058
Common stock outstanding (in shares)	17,223	16,058
Class B-2 [Member]	'	'
Common stock issued (in shares)	34	41
Common stock outstanding (in shares)	34	41

Statements_of_Income_Unaudited

Statements of Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Interest Income:	'	'	'	'
Advances	$26,392	$30,531	$78,951	$93,763
Prepayment Fees on Advances, net	617	273	1,678	8,127
Interest-Bearing Deposits	52	87	166	476
Securities Purchased Under Agreements to Resell	6	71	163	954
Federal Funds Sold	553	380	1,249	1,572
Available-for-Sale Securities	6,715	6,983	19,726	23,440
Held-to-Maturity Securities	32,999	34,998	96,422	106,008
Mortgage Loans Held for Portfolio, net	58,893	59,763	173,404	186,186
Other Interest Income, net	-112	574	423	1,121
Total Interest Income	126,115	133,660	372,182	421,647
Interest Expense:	'	'	'	'
Consolidated Obligation Discount Notes	2,021	1,732	4,770	6,101
Consolidated Obligation Bonds	76,689	77,552	229,041	235,630
Deposits	18	25	63	70
Mandatorily Redeemable Capital Stock	129	2,225	874	6,713
Total Interest Expense	78,857	81,534	234,748	248,514
Net Interest Income	47,258	52,126	137,434	173,133
Provision for (Reversal of) Credit Losses	-126	314	-916	-3,451
Net Interest Income After Provision for Credit Losses	47,384	51,812	138,350	176,584
Other Income (Loss):	'	'	'	'
Total Other-Than-Temporary Impairment Losses	0	0	0	0
Non-Credit Portion Reclassified to (from) Other Comprehensive Income, net	-42	0	-270	-1,924
Net Other-Than-Temporary Impairment Losses, credit portion	-42	0	-270	-1,924
Net Realized Gains from Sale of Available-for-Sale Securities	0	0	0	17,135
Net Gains (Losses) on Derivatives and Hedging Activities	677	-125	6,783	10,671
Service Fees	220	225	662	684
Standby Letters of Credit Fees	114	119	407	873
Other, net (Note 16)	5,851	332	15,085	1,024
Total Other Income (Loss)	6,820	551	22,667	28,463
Other Expenses:	'	'	'	'
Compensation and Benefits	10,084	14,101	30,598	33,153
Other Operating Expenses	5,126	4,520	13,622	13,002
Federal Housing Finance Agency	626	550	2,044	1,914
Office of Finance	544	640	1,987	2,104
Other	307	354	943	925
Total Other Expenses	16,687	20,165	49,194	51,098
Income Before Assessments	37,517	32,198	111,823	153,949
Affordable Housing Program Assessments	3,765	3,442	11,270	16,066
Net Income	$33,752	$28,756	$100,553	$137,883

Statements_of_Comprehensive_In

Statements of Comprehensive Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net Income	$33,752	$28,756	$100,553	$137,883
Other Comprehensive Income:	'	'	'	'
Net Change in Unrealized Gains (Losses) on Available-for-Sale Securities	9,696	2,392	22,273	-9,468
Non-Credit Portion of Other-Than-Temporary Impairment Losses on Available-for-Sale Securities:	'	'	'	'
Reclassification of Non-Credit Portion to Other Income (Loss)	42	0	270	1,924
Net Change in Fair Value Not in Excess of Cumulative Non-Credit Losses	-46	-84	-227	35,095
Unrealized Gains (Losses)	569	2,474	13,442	7,615
Reclassification of Net Realized Gains From Sale to Other Income (Loss)	0	0	0	-17,135
Net Non-Credit Portion of Other-Than-Temporary Impairment Losses on Available-for-Sale Securities	565	2,390	13,485	27,499
Non-Credit Portion of Other-Than-Temporary Impairment Losses on Held-to-Maturity Securities:	'	'	'	'
Accretion of Non-Credit Portion	22	18	54	55
Net Non-Credit Portion of Other-Than-Temporary Impairment Losses on Held-to-Maturity Securities	22	18	54	55
Pension Benefits, net	-36	6,175	-108	6,874
Total Other Comprehensive Income	10,247	10,975	35,704	24,960
Total Comprehensive Income	$43,999	$39,731	$136,257	$162,843

Statements_of_Capital_Unaudite

Statements of Capital (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'
Beginning Balance	'	'	$2,383,603	$2,215,842
Total Comprehensive Income	43,999	39,731	136,257	162,843
Proceeds from Sale of Capital Stock	'	'	115,902	145,156
Shares Reclassified (to) from Mandatorily Redeemable Capital Stock, net	'	'	-47	-95,441
Distributions on Mandatorily Redeemable Capital Stock	'	'	'	-137
Stock Repurchased During Period, Value	'	'	-100	'
Cash Dividends on Capital Stock (3.50% and 4.33% annualized, respectively)	'	'	-52,524	-42,756
Ending Balance	2,583,091	2,385,507	2,583,091	2,385,507
Capital Stock Class B Putable [Member]	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'
Beginning Balance, Shares	'	'	16,099	16,343
Beginning Balance	'	'	1,609,931	1,634,300
Proceeds from Sale of Capital Stock, Shares	'	'	1,159	1,451
Proceeds from Sale of Capital Stock	'	'	115,902	145,156
Shares Reclassified (to) from Mandatorily Redeemable Capital Stock, net (shares)	'	'	0	-954
Shares Reclassified (to) from Mandatorily Redeemable Capital Stock, net	'	'	-47	-95,441
Stock Repurchased During Period, Value	'	'	-100	'
Stock Repurchased During Period, Shares	'	'	-1	'
Ending Balance, Shares	17,257	16,840	17,257	16,840
Ending Balance	1,725,686	1,684,015	1,725,686	1,684,015
Retained Earnings Total [Member]	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'
Beginning Balance	'	'	751,952	591,600
Total Comprehensive Income	'	'	100,553	137,883
Distributions on Mandatorily Redeemable Capital Stock	'	'	'	-137
Cash Dividends on Capital Stock (3.50% and 4.33% annualized, respectively)	'	'	-52,524	-42,756
Ending Balance	799,981	686,590	799,981	686,590
Retained Earnings, Unrestricted [Member]	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'
Beginning Balance	'	'	666,515	549,773
Total Comprehensive Income	'	'	80,442	110,306
Distributions on Mandatorily Redeemable Capital Stock	'	'	'	-137
Cash Dividends on Capital Stock (3.50% and 4.33% annualized, respectively)	'	'	-52,524	-42,756
Ending Balance	694,433	617,186	694,433	617,186
Retained Earnings, Restricted [Member]	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'
Beginning Balance	'	'	85,437	41,827
Total Comprehensive Income	'	'	20,111	27,577
Distributions on Mandatorily Redeemable Capital Stock	'	'	'	0
Cash Dividends on Capital Stock (3.50% and 4.33% annualized, respectively)	'	'	0	0
Ending Balance	105,548	69,404	105,548	69,404
Accumulated Other Comprehensive Income (Loss) [Member]	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'
Beginning Balance	'	'	21,720	-10,058
Total Comprehensive Income	'	'	35,704	24,960
Ending Balance	$57,424	$14,902	$57,424	$14,902

Statements_of_Capital_Unaudite1

Statements of Capital (Unaudited) (Parenthetical)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Statement of Stockholders' Equity [Abstract]	'	'
Annualized Dividend Rate on Capital Stock	4.33%	3.50%

Statements_of_Cash_Flows_Unaud

Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013
Operating Activities:	'		'
Net Income	$100,553		$137,883
Adjustments to reconcile Net Income to Net Cash provided by Operating Activities:	'		'
Amortization and Depreciation	14,318		74,755
Prepayment Fees on Advances, net of related swap termination fees	-475		-4,335
Changes in Net Derivative and Hedging Activities	41,733		33,983
Net Other-Than-Temporary Impairment Losses, credit portion	270		1,924
Provision for (Reversal of) Credit Losses	-916		-3,451
Net Realized Gains from Sale of Available-for-Sale Securities	0		-17,135
Changes in:	'		'
Accrued Interest Receivable	-216		5,626
Other Assets	17,038		7,526
Accrued Interest Payable	1,332		7,088
Other Liabilities	13,883		1,141
Total Adjustments, net	86,967		107,122
Net Cash provided by Operating Activities	187,520		245,005
Changes in:	'		'
Interest-Bearing Deposits	101,874		280,168
Securities Purchased Under Agreements to Resell	0		550,000
Federal Funds Sold	0		1,865,000
Purchases of Premises, Software, and Equipment	-3,787		-7,781
Available-for-Sale Securities:	'		'
Proceeds from Maturities	65,799		64,978
Proceeds from Sales	0		129,471
Held-to-Maturity Securities:	'		'
Proceeds from Maturities	745,720		835,899
Purchases	-574,885		-696,238
Advances:	'		'
Principal Collected	51,216,136		31,058,385
Disbursed to Members	-53,260,098		-32,041,661
Mortgage Loans Held for Portfolio:	'		'
Principal Collected	660,265		1,095,371
Purchases of Loans from Members and Participation Interests from Other Federal Home Loan Banks	-945,230		-1,263,177
Net Cash provided by (used in) Investing Activities	-1,994,206		1,870,415
Financing Activities:	'		'
Changes in Deposits	-47,099		-671,842
Net Payments on Derivative Contracts with Financing Elements	-46,171		-54,118
Net Proceeds from Issuance of Consolidated Obligations:	'		'
Discount Notes	35,623,619		52,000,451
Bonds	15,948,090		16,351,138
Payments for Matured and Retired Consolidated Obligations:	'		'
Discount Notes	-32,952,279		-53,119,138
Bonds	-15,656,000		-16,024,425
Other Federal Home Loan Banks:	'		'
Proceeds from Borrowings	22,000		427,000
Payments for Maturities	-22,000		-427,000
Proceeds from Sale of Capital Stock	115,902		145,156
Payments for Redemption/Repurchase of Mandatorily Redeemable Capital Stock	-697		-290,975
Payments for Redemption/Repurchase of Capital Stock	-100		0
Cash Dividends Paid on Capital Stock	-52,524		-42,756
Net Cash provided by (used in) Financing Activities	2,932,741		-1,706,509
Net Increase in Cash and Due from Banks	1,126,055		408,911
Cash and Due from Banks at Beginning of Period	3,318,564		105,472
Cash and Due from Banks at End of Period	4,444,619		514,383
Supplemental Disclosures:	'		'
Interest Paid	224,198		250,138
Affordable Housing Program Payments	12,363	[1]	10,654	[1]
Capitalized Interest on Certain Held-to-Maturity Securities	2,459		6,562
Par Value of Shares Reclassified to Mandatorily Redeemable Capital Stock, net	47		95,441
Net Transfers of Mortgage Loans to Real Estate Owned	$117		$0
[1]	Subsidies disbursed are reported net of returns/recaptures of previously disbursed subsidies.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'
	Note 1 - Summary of Significant Accounting Policies
	Basis of Presentation. The accompanying interim financial statements of the Federal Home Loan Bank of Indianapolis have been prepared in accordance with GAAP, and the instructions promulgated by the SEC, for interim financial information. Accordingly, they do not include all of the information and disclosures required by GAAP for complete financial statements. The interim financial statements presented herein should be read in conjunction with our audited financial statements and notes thereto, which are included in our 2013 Form 10-K.
	The financial statements contain all adjustments that are, in the opinion of management, necessary for a fair statement of our financial position, results of operations and cash flows for the interim periods presented. All such adjustments were of a normal recurring nature. The results of operations for the periods presented are not necessarily indicative of the results to be expected for the full fiscal year or any other interim period.
	Our significant accounting policies and certain other disclosures are set forth in Note 1 - Summary of Significant Accounting Policies in our 2013 Form 10-K. There have been no material changes to these policies through September 30, 2014.
	We use certain acronyms and terms throughout these financial statements, which are defined in the Glossary of Terms. Unless the context otherwise requires, the terms "we," "us," and "our" refer to the Federal Home Loan Bank of Indianapolis or its management.
	Reclassifications. We have reclassified certain amounts from the prior periods to conform to the current period presentation. These reclassifications had no effect on Net Income, Total Comprehensive Income, Total Capital, or net Cash Flows.
	Use of Estimates. The preparation of financial statements in accordance with GAAP requires us to make subjective assumptions and estimates that may affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities, and the reported amounts of income and expense. Although the reported amounts and disclosures reflect our best estimates, actual results could differ significantly from these estimates.
	Financial Instruments Meeting Netting Requirements. We present certain financial instruments, including derivative instruments and securities purchased under agreements to resell, on a net basis when we have a legal right of offset and all other requirements for netting are met (collectively referred to as the netting requirements). For these financial instruments, we have elected to offset our derivative asset and liability positions, as well as cash collateral received or pledged, when we have met the netting requirements. We did not have any offsetting liabilities related to securities purchased under agreements to resell at September 30, 2014 or December 31, 2013.

Recently_Adopted_and_Issued_Ac

Recently Adopted and Issued Accounting Guidance	9 Months Ended
	Sep. 30, 2014
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]	'
Recently Adopted and Issued Accounting Guidance	'
	Note 2 - Recently Adopted and Issued Accounting Guidance
	Disclosure of Uncertainties About an Entity's Ability to Continue as a Going Concern. On August 27, 2014, the FASB issued guidance about management's responsibility to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern and to provide related footnote disclosures. This guidance requires management to perform interim and annual assessments of an entity's ability to continue as a going concern within one year after the date the financial statements are issued or within one year after the financial statements are available to be issued, when applicable. Substantial doubt exists if it is probable that the entity will be unable to meet its obligations for the assessed period. This guidance becomes effective for the interim and annual periods ending after December 15, 2016, and early adoption is permitted. This guidance is not expected to affect our financial condition, results of operations and cash flows.
	Classification of Certain Government-Guaranteed Mortgage Loans upon Foreclosure. On August 8, 2014, the FASB issued amended guidance relating to the classification and measurement of certain government-guaranteed mortgage loans upon foreclosure. The amendments in this guidance require that a mortgage loan be derecognized and that a separate other receivable be recognized upon foreclosure if certain conditions are met. This guidance becomes effective for the interim and annual periods beginning after December 15, 2014, and may be adopted using either the modified retrospective transition method or the prospective transition method. We are in the process of evaluating this guidance, but its effect on our financial condition, results of operations and cash flows is not expected to be material.
	Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures. On June 12, 2014, the FASB issued amended guidance for repurchase-to-maturity transactions and repurchase agreements executed as repurchase financings. This amendment requires entities to account for repurchase-to-maturity transactions as secured borrowings rather than as sales with forward repurchase agreements. In addition, this guidance requires additional disclosures, particularly on transfers accounted for as sales that are economically similar to repurchase agreements and on the nature of collateral pledged in repurchase agreements accounted for as secured borrowings. This guidance becomes effective for the first interim or annual period beginning after December 15, 2014, and early adoption is prohibited. The changes in accounting for transactions outstanding on the effective date are required to be presented as a cumulative-effect adjustment to retained earnings as of the beginning of the period of adoption. We are in the process of evaluating this guidance, but its effect on our financial condition, results of operations and cash flows is not expected to be material.
	Revenue from Contracts with Customers. On May 28, 2014, the FASB issued guidance on revenue from contracts with customers. This guidance outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry specific guidance. In addition, this guidance amends the existing requirements for the recognition of a gain or loss on the transfer of nonfinancial assets that are not in a contract with a customer. This guidance applies to all contracts with customers except those that are within the scope of other standards, such as financial instruments, certain guarantees, insurance contracts, or lease contracts. This guidance becomes effective for the interim and annual reporting periods beginning after December 15, 2016, and early application is not permitted. The guidance provides entities with the option of using either of the following two methods upon adoption: (i) a full retrospective method, retrospectively to each prior reporting period presented; or (ii) a transition method, retrospectively with the cumulative effect of initially applying this guidance recognized at the date of initial application. We are in the process of evaluating this guidance, but its effect on our financial condition, results of operations and cash flows is not expected to be material.
	Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure. On January 17, 2014, the FASB issued guidance clarifying when consumer mortgage loans collateralized by real estate should be reclassified to REO. Specifically, such collateralized mortgage loans should be reclassified to REO when either the creditor obtains legal title to the residential real estate property upon completion of a foreclosure, or the borrower conveys all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed-in-lieu of foreclosure or through a similar legal agreement. This guidance is effective for interim and annual periods beginning on or after December 15, 2014 and may be adopted under either the modified retrospective transition method or the prospective transition method. We are in the process of evaluating this guidance, but its effect on our financial condition, results of operations and cash flows is not expected to be material.
	Advisory Bulletin 2012-02. On April 9, 2012, the Finance Agency issued Advisory Bulletin 2012-02, Framework for Adversely Classifying Loans, Other Real Estate Owned, and Other Assets and Listing Assets for Special Mention ("AB-2012-02"). The guidance establishes a standard and uniform methodology for adversely classifying certain assets other than investment securities and prescribes the timing of asset charge-offs based on these classifications. Such accounting guidance differs from our current methodology and accounting policy, particularly in that, among other differences, AB 2012-02 states that, with certain exceptions, any loss exposure on a loan more than 180 days past due should be adversely classified and charged off. The Finance Agency has stated that, when a loan is 180 days delinquent, their review of the data indicates that, under most circumstances, the likelihood of full repayment is remote. The charge-off amount is generally the excess of the loan balance over the fair value of the underlying property, less costs to sell, and adjusted for credit enhancements. AB-2012-02 states that it was effective upon issuance. However, the Finance Agency issued additional guidance that extended the effective date for classification purposes to January 1, 2014 and the effective date for financial reporting purposes to January 1, 2015. We implemented the classification methodology effective January 1, 2014, which did not have an effect on our financial condition, results of operations, or cash flows. We do not expect the implementation of the financial reporting guidance, effective January 1, 2015, to have a material effect on our financial condition, results of operations or cash flows.

AvailableforSale_Securities

Available-for-Sale Securities	9 Months Ended
	Sep. 30, 2014
Available-for-sale Securities [Abstract]	'
Available-for-sale Securities	'
	Note 3 - Available-for-Sale Securities
	Major Security Types. The following table presents information on our AFS securities:
								Gross		Gross
			Amortized		Non-Credit			Unrealized		Unrealized			Estimated
	September 30, 2014		Cost (1)		OTTI			Gains		Losses			Fair Value
	GSE and TVA debentures		$	3,132,599	$	—		$	22,590	$	—		$	3,155,189
	Private-label RMBS		379,426		(192		)	39,613		—			418,847
	Total AFS securities		$	3,512,025	$	(192	)	$	62,203	$	—		$	3,574,036
	December 31, 2013
	GSE and TVA debentures		$	3,162,833	$	—		$	6,623	$	(6,306	)	$	3,163,150
	Private-label RMBS		443,749		(234		)	26,170		—			469,685
	Total AFS securities		$	3,606,582	$	(234	)	$	32,793	$	(6,306	)	$	3,632,835
	(1)	Includes adjustments made to the cost basis of an investment for accretion, amortization, collection of principal, and, if applicable, OTTI recognized in earnings (credit losses) and fair-value hedge accounting adjustments.
	Unrealized Loss Positions. The following table presents impaired AFS securities (i.e., in an unrealized loss position), which are aggregated by major security type and length of time that individual securities have been in a continuous unrealized loss position.
			Less than 12 months					12 months or more					Total
			Estimated		Unrealized			Estimated		Unrealized			Estimated		Unrealized
	September 30, 2014		Fair Value		Losses			Fair Value		Losses			Fair Value		Losses
	GSE and TVA debentures		$	—	$	—		$	—	$	—		$	—	$	—
	Private-label RMBS		—		—			5,869		(192		)	5,869		(192		)
	Total impaired AFS securities		$	—	$	—		$	5,869	$	(192	)	$	5,869	$	(192	)
	December 31, 2013
	GSE and TVA debentures		$	880,095	$	(6,306	)	$	—	$	—		$	880,095	$	(6,306	)
	Private-label RMBS		—		—			7,135		(234		)	7,135		(234		)
	Total impaired AFS securities		$	880,095	$	(6,306	)	$	7,135	$	(234	)	$	887,230	$	(6,540	)
	Redemption Terms. The amortized cost and estimated fair value of non-MBS AFS securities by contractual maturity are presented below. MBS are not presented by contractual maturity because their actual maturities will likely differ from contractual maturities as borrowers have the right to prepay their obligations with or without prepayment fees.
			September 30, 2014					December 31, 2013
			Amortized		Estimated			Amortized		Estimated
	Year of Contractual Maturity		Cost		Fair Value			Cost		Fair Value
	Due after one year through five years		$	2,492,564	$	2,506,984		$	2,046,472	$	2,052,348
	Due after five years through ten years		640,035		648,205			1,083,608		1,078,558
	Due after ten years		—		—			32,753		32,244
	Total Non-MBS		3,132,599		3,155,189			3,162,833		3,163,150
	Total MBS		379,426		418,847			443,749		469,685
	Total AFS securities		$	3,512,025	$	3,574,036		$	3,606,582	$	3,632,835
	Realized Gains and Losses. There were no sales of AFS securities during the three and nine months ended September 30, 2014. However, on April 4, 2013, we sold six OTTI AFS securities, only one of which was in an unrealized loss position. Prior to the sale, we recorded an OTTI credit charge for this security, representing the entire difference between our amortized cost basis and its estimated fair value, which resulted in no gross realized losses from this sale.
			Three Months Ended September 30,					Nine Months Ended September 30,
	Sales of AFS Securities		2014		2013			2014		2013
	Proceeds from sale		$	—	$	—		$	—	$	129,471
	Previously recognized OTTI credit losses including accretion		—		—			—		38,806
	Gross realized gains		—		—			—		17,135
	Gross realized losses		—		—			—		—
	Net Realized Gains from Sale of Available-for-Sale Securities		$	—	$	—		$	—	$	17,135
	As of September 30, 2014, we had no intention of selling the AFS securities in an unrealized loss position nor did we consider it more likely than not that we will be required to sell these securities before our anticipated recovery of each security's remaining amortized cost basis.

HeldtoMaturity_Securities

Held-to-Maturity Securities	9 Months Ended
	Sep. 30, 2014
Held-to-maturity Securities [Abstract]	'
Held-to-Maturity Securities	'
	Note 4 - Held-to-Maturity Securities
	Major Security Types. The following table presents information on our HTM securities:
										Gross			Gross
										Unrecognized			Unrecognized
			Amortized		Non-Credit			Carrying		Holding			Holding			Estimated
	September 30, 2014		Cost (1)		OTTI			Value (2)		Gains (3)			Losses (3)			Fair Value
	GSE debentures		$	268,999	$	—		$	268,999	$	257		$	—		$	269,256
	RMBS and ABS:
	Other U.S. obligations -guaranteed RMBS		3,042,915		—			3,042,915		40,774			(2,365		)	3,081,324
	GSE RMBS		3,635,901		—			3,635,901		83,087			(2,005		)	3,716,983
	Private-label RMBS		111,369		—			111,369		566			(1,095		)	110,840
	Manufactured housing loan ABS		11,618		—			11,618		—			(1,241		)	10,377
	Home equity loan ABS		1,780		(187		)	1,593		112			(85		)	1,620
	Total RMBS and ABS		6,803,583		(187		)	6,803,396		124,539			(6,791		)	6,921,144
	Total HTM securities		$	7,072,582	$	(187	)	$	7,072,395	$	124,796		$	(6,791	)	$	7,190,400
	December 31, 2013
	GSE debentures		$	268,998	$	—		$	268,998	$	399		$	—		$	269,397
	RMBS and ABS:
	Other U.S. obligations -guaranteed RMBS		3,119,458		—			3,119,458		45,171			(7,406		)	3,157,223
	GSE RMBS		3,592,695		—			3,592,695		70,572			(6,554		)	3,656,713
	Private-label RMBS		150,287		—			150,287		185			(2,663		)	147,809
	Manufactured housing loan ABS		12,933		—			12,933		—			(1,590		)	11,343
	Home equity loan ABS		2,120		(241		)	1,879		67			(113		)	1,833
	Total RMBS and ABS		6,877,493		(241		)	6,877,252		115,995			(18,326		)	6,974,921
	Total HTM securities		$	7,146,491	$	(241	)	$	7,146,250	$	116,394		$	(18,326	)	$	7,244,318
	(1)	Includes adjustments made to the cost basis of an investment for accretion, amortization, collection of principal, and, if applicable, OTTI recognized in earnings (credit losses).
	(2)	Represents amortized cost after adjustment for non-credit OTTI recognized in AOCI.
	(3)	Represents the difference between estimated fair value and carrying value.
	Unrealized Loss Positions. The following table presents impaired HTM securities (i.e., in an unrealized loss position), aggregated by major security type and length of time that individual securities have been in a continuous unrealized loss position. None of our non-MBS were in an unrealized loss position at September 30, 2014 or December 31, 2013.
			Less than 12 months					12 months or more					Total
			Estimated		Unrealized			Estimated		Unrealized			Estimated			Unrealized
	September 30, 2014		Fair Value		Losses			Fair Value		Losses			Fair Value			Losses (1)
	RMBS and ABS:
	Other U.S. obligations - guaranteed RMBS		$	—	$	—		$	719,220	$	(2,365	)	$	719,220		$	(2,365	)
	GSE RMBS		325,911		(1,562		)	91,784		(443		)	417,695			(2,005		)
	Private-label RMBS		4,477		(7		)	45,271		(1,088		)	49,748			(1,095		)
	Manufactured housing loan ABS		—		—			10,377		(1,241		)	10,377			(1,241		)
	Home equity loan ABS		—		—			1,621		(160		)	1,621			(160		)
	Total RMBS and ABS		330,388		(1,569		)	868,273		(5,297		)	1,198,661			(6,866		)
	Total impaired HTM securities		$	330,388	$	(1,569	)	$	868,273	$	(5,297	)	$	1,198,661		$	(6,866	)
	December 31, 2013
	RMBS and ABS:
	Other U.S. obligations - guaranteed RMBS		$	1,094,158	$	(3,365	)	$	546,459	$	(4,041	)	$	1,640,617		$	(7,406	)
	GSE RMBS		1,338,255		(6,542		)	6,766		(12		)	1,345,021			(6,554		)
	Private-label RMBS		61,059		(561		)	58,363		(2,102		)	119,422			(2,663		)
	Manufactured housing loan ABS		—		—			11,343		(1,590		)	11,343			(1,590		)
	Home equity loan ABS		—		—			1,833		(287		)	1,833			(287		)
	Total RMBS and ABS		2,493,472		(10,468		)	624,764		(8,032		)	3,118,236			(18,500		)
	Total impaired HTM securities		$	2,493,472	$	(10,468	)	$	624,764	$	(8,032	)	$	3,118,236		$	(18,500	)
	(1)	For home equity loan ABS, total unrealized losses does not agree to total gross unrecognized holding losses. Total unrealized losses include non-credit-related OTTI losses recorded in AOCI and gross unrecognized holding gains on previously OTTI securities.
	Redemption Terms. The amortized cost, carrying value and estimated fair value of non-MBS HTM securities by contractual maturity are presented below. MBS and ABS are not presented by contractual maturity because their actual maturities will likely differ from contractual maturities as certain borrowers have the right to prepay their obligations with or without prepayment fees.
			September 30, 2014							December 31, 2013
			Amortized		Carrying			Estimated		Amortized			Carrying			Estimated
	Year of Contractual Maturity		Cost (1)		Value (2)			Fair Value		Cost (1)			Value (2)			Fair Value
	Non-MBS:
	Due in one year or less		$	168,999	$	168,999		$	169,133	$	—		$	—		$	—
	Due after one year through five years		100,000		100,000			100,123		268,998			268,998			269,397
	Total Non-MBS		268,999		268,999			269,256		268,998			268,998			269,397
	Total RMBS and ABS		6,803,583		6,803,396			6,921,144		6,877,493			6,877,252			6,974,921
	Total HTM securities		$	7,072,582	$	7,072,395		$	7,190,400	$	7,146,491		$	7,146,250		$	7,244,318
	(1)	Includes adjustments made to the cost basis of an investment for accretion, amortization, collection of principal, and, if applicable, OTTI recognized in earnings (credit losses).
	(2)	Represents amortized cost after adjustment for non-credit OTTI recognized in AOCI.

OtherThanTemporary_Impairment

Other-Than-Temporary Impairment	9 Months Ended
	Sep. 30, 2014
Other Than Temporary Impairments Analysis [Abstract]	'
Other-Than-Temporary-Impairment	'
	Note 5 - Other-Than-Temporary Impairment
	OTTI Evaluation Process and Results - Private-label RMBS and ABS. On a quarterly basis, we evaluate for OTTI our individual AFS and HTM securities that have been previously OTTI or are in an unrealized loss position. A description of the OTTI evaluation process, uniform framework, and the two third-party models we utilize is disclosed in Note 1 - Summary of Significant Accounting Policies and Note 6 - Other-Than-Temporary Impairment in our 2013 Form 10-K.
	For the nine months ended September 30, 2013, we recorded an OTTI credit charge of $1,924, representing the entire difference between our amortized cost basis and the estimated fair value, on one security for which we changed our previous intention to hold until recovery of its amortized cost. We did not have any such change in intent during the three or nine months ended September 30, 2014 or the three months ended September 30, 2013.
	As a result of our analysis, additional OTTI credit losses were recognized for one security for the three and nine months ended September 30, 2014 but not for the three or nine months ended September 30, 2013. We determined that the unrealized losses on the remaining private-label RMBS and ABS were temporary as we expect to recover the entire amortized cost.
	OTTI - Significant Modeling Assumptions. The FHLBanks' OTTI Governance Committee developed a short-term housing price forecast with projected changes ranging from a decrease of 3% to an increase of 9% over a twelve-month period. For the vast majority of housing markets, the changes range from 0% to an increase of 6%. Thereafter, a unique path is projected for each geographic area based on an internally developed framework derived from historical data.
	The following table presents the other significant modeling assumptions used to determine the amount of credit loss recognized in earnings for the one security that was determined to be OTTI during the three months ended September 30, 2014. The related current credit enhancement is also presented. Credit enhancement is defined as the percentage of subordinated tranches, excess spread, and over-collateralization, if any, in a security structure that will generally absorb losses before we will experience a loss on the security. A credit enhancement percentage of zero reflects a security that has no remaining credit support and is likely to have experienced an actual principal loss. The calculated averages represent the dollar-weighted averages of the private-label RMBS in each category shown. The classification (prime, Alt-A or subprime) is based on the model used to estimate the cash flows for the security, which may not be the same as the classification by the rating agency at the time of origination.
			Significant Modeling Assumptions
			for OTTI private-label RMBS
			for the three months ended September 30, 2014
	Year of Securitization		Prepayment Rates (1)			Default Rates (1)			Loss Severities (1)			Current Credit
												Enhancement (1)
	Prime - 2006		15.5	%		16.6	%		40.3	%		0	%
	(1)	Weighted Average based on UPB.
	The following table presents a rollforward of the amounts related to credit losses recognized in earnings. The rollforward excludes accretion of credit losses for securities that have not experienced a significant increase in cash flows.
			Three Months Ended								Nine Months Ended
			September 30,								September 30,
	Credit Loss Rollforward		2014				2013				2014			2013
	Balance at beginning of period		$	71,584			$	72,287			$	72,287		$	109,169
	Additions:
	Additional credit losses for which OTTI was previously recognized (1)		42				—				270			1,924
	Reductions:
	Credit losses on securities sold, matured, paid down or prepaid		—				—				—			(30,506		)
	Unamortized life-to-date credit losses on security that we intend to sell before recovery of its amortized cost basis		—				—				—			(8,300		)
	Significant increases in cash flows expected to be collected, recognized over the remaining life of the securities (2)		(938		)		—				(1,869		)	—
	Balance at end of period		$	70,688			$	72,287			$	70,688		$	72,287
	(1)	For the three months ended September 30, 2014 and 2013, relates to all securities that were impaired prior to July 1, 2014 and 2013, respectively. For the nine months ended September 30, 2014 and 2013, relates to all securities that were impaired prior to January 1, 2014 and 2013, respectively.
	(2)	Represents amounts to be accreted as interest income over the remaining life of the applicable securities.
	The following table presents the classification and balances at September 30, 2014 of OTTI securities impaired prior to that date (i.e., life-to-date) but not necessarily as of that date. Securities are classified based on the originator's classification at the time of origination or based on the classification by the NRSROs upon issuance. Because there is no universally accepted definition of prime, Alt-A or subprime underwriting standards, such classifications are subjective.
			September 30, 2014
			HTM Securities														AFS Securities
	OTTI Life-to-Date		UPB				Amortized Cost				Carrying Value			Estimated Fair Value			UPB		Amortized Cost		Estimated Fair Value
	Private-label RMBS - prime		$	—			$	—			$	—		$	—		$	443,803	$	379,426	$	418,847
	Home equity loan ABS - subprime		737				705				518			630			—		—		—
	Total		$	737			$	705			$	518		$	630		$	443,803	$	379,426	$	418,847
	OTTI Evaluation Process and Results - All Other AFS and HTM Securities.
	Other U.S. and GSE Obligations and TVA Debentures. For other U.S. obligations, GSE obligations, and TVA debentures, we determined that, based on current expectations, the strength of the issuers' guarantees through direct obligations of, or support from, the United States government is sufficient to protect us from any losses. As a result, all of the gross unrealized losses as of September 30, 2014 are considered temporary.

Advances

Advances	9 Months Ended
	Sep. 30, 2014
Advances [Abstract]	'
Advances	'
	Note 6 - Advances
	We had Advances outstanding, as presented below by year of contractual maturity, with interest rates ranging from 0% to 8.34%.
		September 30, 2014					December 31, 2013
	Year of Contractual Maturity	Amount			WAIR %		Amount				WAIR %
	Overdrawn demand and overnight deposit accounts	$	959		2.43		$	1,092			2.5
	Due in 1 year or less	6,194,403			0.64		5,952,161				0.58
	Due after 1 year through 2 years	2,640,043			1.9		1,695,355				2.61
	Due after 2 years through 3 years	2,383,572			1.74		2,289,954				1.59
	Due after 3 years through 4 years	2,105,242			2.18		2,190,551				1.86
	Due after 4 years through 5 years	1,019,474			1.94		1,803,488				2.17
	Thereafter	4,832,053			1.43		3,199,181				1.93
	Total Advances, par value	19,175,746			1.39		17,131,782				1.5
	Fair-value hedging adjustments	126,822					181,211
	Unamortized swap termination fees associated with modified Advances, net of deferred prepayment fees	22,134					24,425
	Total Advances	$	19,324,702				$	17,337,418
	Prepayments. The following table presents Advance prepayment fees and the associated swap termination fees recognized in Interest Income at the time of the prepayments:
		Three Months Ended September 30,						Nine Months Ended September 30,
	Recognized prepayment/termination fees	2014			2013			2014				2013
	Prepayment fees on Advances	$	593		$	273		$	2,010			$	30,807
	Associated swap termination fees	24			—			(332		)		(22,680		)
	Prepayment Fees on Advances, net	$	617		$	273		$	1,678			$	8,127
	The following table presents deferred Advance prepayment fees and deferred swap termination fees associated with those Advance prepayments:
		Three Months Ended September 30,						Nine Months Ended September 30,
	Deferred prepayment/termination fees	2014			2013			2014				2013
	Deferred prepayment fees on Advances	$	477		$	197		$	477			$	12,132
	Deferred associated swap termination fees	(475		)	—			(475		)		(7,415		)
	Deferred prepayment fees on Advances, net	$	2		$	197		$	2			$	4,717
	At September 30, 2014 and December 31, 2013, we had $5.4 billion and $4.1 billion, respectively, of Advances that can be prepaid without incurring prepayment or termination fees. All other Advances may only be prepaid by paying a fee that is sufficient to make us financially indifferent to the prepayment of the Advance.
	At September 30, 2014 and December 31, 2013, we had putable Advances outstanding totaling $179,000 and $188,000, respectively. We had no convertible Advances outstanding at September 30, 2014 or December 31, 2013.
	The following table presents Advances by the earlier of the year of contractual maturity or the next call date and next put date:
		Year of Contractual Maturity						Year of Contractual Maturity
		or Next Call Date						or Next Put Date
		September 30,			December 31,			September 30,				December 31,
		2014			2013			2014				2013
	Overdrawn demand and overnight deposit accounts	$	959		$	1,092		$	959			$	1,092
	Due in 1 year or less	10,031,518			8,312,526			6,370,903				6,128,161
	Due after 1 year through 2 years	2,804,043			1,572,105			2,611,043				1,683,855
	Due after 2 years through 3 years	2,150,822			2,293,954			2,301,072				2,259,954
	Due after 3 years through 4 years	1,905,242			2,052,801			2,055,242				2,091,051
	Due after 4 years through 5 years	954,474			1,653,488			1,004,474				1,768,488
	Thereafter	1,328,688			1,245,816			4,832,053				3,199,181
	Total Advances, par value	$	19,175,746		$	17,131,782		$	19,175,746			$	17,131,782
	Credit Risk Exposure and Security Terms. At September 30, 2014 and December 31, 2013, we had a total of $8.1 billion and $5.3 billion, respectively, of Advances outstanding, at par, to single borrowers with balances that were greater than or equal to $1.0 billion. These Advances, representing 42% and 31%, respectively, of total Advances at par outstanding on those dates, were made to five and three borrowers, respectively. At September 30, 2014 and December 31, 2013, we held $14.7 billion and $10.1 billion, respectively, of UPB of collateral to cover the Advances to these borrowers.
	See Note 8 - Allowance for Credit Losses for information related to credit risk on Advances and allowance methodology for credit losses.

Mortgage_Loans_Held_for_Portfo

Mortgage Loans Held for Portfolio	9 Months Ended
	Sep. 30, 2014
Mortgage Loans on Real Estate [Abstract]	'
Mortgage Loans Held for Portfolio	'
	Note 7 - Mortgage Loans Held for Portfolio
	The following tables present information on Mortgage Loans Held for Portfolio:
			September 30, 2014
	Term		MPP			MPF			Total
	Fixed-rate long-term mortgages		$	4,865,767		$	440,964		$	5,306,731
	Fixed-rate medium-term (1) mortgages		960,647			81,754			1,042,401
	Total Mortgage Loans Held for Portfolio, UPB		5,826,414			522,718			6,349,132
	Unamortized premiums		120,107			9,514			129,621
	Unamortized discounts		(8,654		)	—			(8,654		)
	Fair-value hedging adjustments		5,144			(529		)	4,615
	Allowance for loan losses		(2,750		)	(250		)	(3,000		)
	Total Mortgage Loans Held for Portfolio, net		$	5,940,261		$	531,453		$	6,471,714
			December 31, 2013
	Term		MPP			MPF			Total
	Fixed-rate long-term mortgages		$	4,528,804		$	457,128		$	4,985,932
	Fixed-rate medium-term (1) mortgages		1,012,587			86,914			1,099,501
	Total Mortgage Loans Held for Portfolio, UPB		5,541,391			544,042			6,085,433
	Unamortized premiums		106,346			10,917			117,263
	Unamortized discounts		(11,942		)	(288		)	(12,230		)
	Fair-value hedging adjustments		4,374			(536		)	3,838
	Allowance for loan losses		(4,000		)	(500		)	(4,500		)
	Total Mortgage Loans Held for Portfolio, net		$	5,636,169		$	553,635		$	6,189,804
	(1)	Defined as a term of 15 years or less at origination.
			September 30, 2014
	Type		MPP			MPF			Total
	Conventional		$	5,168,497		$	418,501		$	5,586,998
	Government		657,917			104,217			762,134
	Total Mortgage Loans Held for Portfolio, UPB		$	5,826,414		$	522,718		$	6,349,132
			December 31, 2013
	Type		MPP			MPF			Total
	Conventional		$	4,804,298		$	435,996		$	5,240,294
	Government		737,093			108,046			845,139
	Total Mortgage Loans Held for Portfolio, UPB		$	5,541,391		$	544,042		$	6,085,433
	For information related to our credit risk on mortgage loans and allowance for loan losses, see Note 8 - Allowance for Credit Losses.

Allowance_for_Credit_Losses

Allowance for Credit Losses	9 Months Ended
	Sep. 30, 2014
Allowance for Credit Losses [Abstract]	'
Allowance for Credit Losses	'
	Note 8 - Allowance for Credit Losses
	We have established a methodology to determine the allowance for credit losses for each of our portfolio segments: credit products (Advances, letters of credit, and other extensions of credit to members); term securities purchased under agreements to resell; term federal funds sold; government-guaranteed or insured Mortgage Loans Held for Portfolio; and conventional Mortgage Loans Held for Portfolio. A description of the allowance methodologies for our portfolio segments as well as our policy for impairing financing receivables, placing them on non-accrual status, and charging them off when necessary is disclosed in Note 1 - Summary of Significant Accounting Policies and Note 9 - Allowance for Credit Losses in our 2013 Form 10-K.
	Credit Products. Using a risk-based approach, we consider the amount and quality of the collateral pledged and the borrower's financial condition to be indicators of credit quality on the borrower's credit products. At September 30, 2014 and December 31, 2013, we had rights to collateral on a borrower-by-borrower basis with an estimated value in excess of our outstanding extensions of credit.
	At September 30, 2014 and December 31, 2013, we did not have any credit products that were past due, on non-accrual status, or considered impaired. In addition, there were no troubled debt restructurings related to credit products during the nine months ended September 30, 2014 and 2013.
	Based upon the collateral held as security, our credit extension and collateral policies, our credit analysis and the repayment history on credit products, we have not recorded any allowance for credit losses on credit products. Accordingly, at September 30, 2014 and December 31, 2013, no liability was recorded to reflect an allowance for credit losses for off-balance sheet credit exposures. For additional information about off-balance sheet credit exposure, see Note 16 - Commitments and Contingencies.
	Mortgage Loans Held for Portfolio.
	Credit Enhancements.
	MPP Credit Enhancements. The following table presents the impact of credit enhancements on the allowance for MPP loan losses:
	MPP Credit Waterfall		September 30,			December 31,
			2014			2013
	Estimated losses remaining after borrower's equity, before credit enhancements		$	21,873		$	31,523
	Portion of estimated losses recoverable from PMI		(3,273		)	(4,922		)
	Portion of estimated losses recoverable from LRA		(4,000		)	(5,072		)
	Portion of estimated losses recoverable from SMI		(12,049		)	(18,740		)
	Allowance for unrecoverable PMI/SMI		199			1,211
	Allowance for MPP loan losses		$	2,750		$	4,000
	The following table presents the activity in the LRA:
			Three Months Ended September 30,						Nine Months Ended September 30,
	LRA Activity		2014			2013			2014			2013
	Balance of LRA, beginning of period		$	49,918		$	40,091		$	45,330		$	33,693
	Additions		5,807			3,856			11,917			12,555
	Claims paid		(411		)	(662		)	(1,664		)	(2,422		)
	Distributions		(93		)	(220		)	(362		)	(761		)
	Balance of LRA, end of period		$	55,221		$	43,065		$	55,221		$	43,065
	MPF Credit Enhancements. CE Fees paid to PFIs were $99 and $90 for the three months ended September 30, 2014 and 2013, respectively, and $302 and $207 for the nine months ended September 30, 2014 and 2013, respectively. Performance-based CE fees may be withheld to cover losses allocated to us.
	If losses occur in a master commitment, these losses will either be: (i) recovered through the withholding of future performance-based CE Fees from the PFI or (ii) absorbed by us in the FLA. As of September 30, 2014 and December 31, 2013, our exposure under the FLA was $3,420 and $3,338, respectively, with CE Obligations available to cover losses in excess of the FLA totaling $26,851 and $26,284, respectively. Any estimated losses that would be absorbed by the CE Obligation are not reserved for as part of our allowance for loan losses. Accordingly, the calculated allowance was reduced by $11 and $142 as of September 30, 2014 and December 31, 2013, respectively, for the amount in excess of the FLA to be covered by PFIs’ CE Obligations. As of September 30, 2014 and December 31, 2013, the resulting allowance for MPF loan losses was $250 and $500, respectively.
	Allowance for Loan Losses on Mortgage Loans. The tables below present a rollforward of our allowance for loan losses, the allowance for loan losses by impairment methodology, and the recorded investment in conventional mortgage loans by impairment methodology.
			Conventional
	Rollforward of Allowance		MPP			MPF			Total
	Allowance for loan losses, June 30, 2014		$	3,000		$	250		$	3,250
	Charge-offs, net of recoveries		(124		)	—			(124		)
	Provision for (reversal of) loan losses		(126		)	—			(126		)
	Allowance for loan losses, September 30, 2014		$	2,750		$	250		$	3,000
	Allowance for loan losses, June 30, 2013		$	5,000		$	500		$	5,500
	Charge-offs, net of recoveries		(314		)	—			(314		)
	Provision for (reversal of) loan losses		314			—			314
	Allowance for loan losses, September 30, 2013		$	5,000		$	500		$	5,500
	Allowance for loan losses, December 31, 2013		$	4,000		$	500		$	4,500
	Charge-offs, net of recoveries		(575		)	(9		)	(584		)
	Provision for (reversal of) loan losses		(675		)	(241		)	(916		)
	Allowance for loan losses, September 30, 2014		$	2,750		$	250		$	3,000
	Allowance for loan losses, December 31, 2012		$	9,850		$	150		$	10,000
	Charge-offs, net of recoveries		(1,049		)	—			(1,049		)
	Provision for (reversal of) loan losses		(3,801		)	350			(3,451		)
	Allowance for loan losses, September 30, 2013		$	5,000		$	500		$	5,500
			Conventional
	Allowance for Loan Losses, September 30, 2014		MPP			MPF			Total
	Loans collectively evaluated for impairment		$	2,292		$	250		$	2,542
	Loans individually evaluated for impairment (1)		458			—			458
	Total allowance for loan losses		$	2,750		$	250		$	3,000
	Allowance for Loan Losses, December 31, 2013
	Loans collectively evaluated for impairment		$	3,065		$	500		$	3,565
	Loans individually evaluated for impairment (1)		935			—			935
	Total allowance for loan losses		$	4,000		$	500		$	4,500
	Recorded Investment, September 30, 2014
	Loans collectively evaluated for impairment		$	5,270,562		$	428,405		$	5,698,967
	Loans individually evaluated for impairment (1)		19,137			—			19,137
	Total recorded investment		$	5,289,699		$	428,405		$	5,718,104
	Recorded Investment, December 31, 2013
	Loans collectively evaluated for impairment		$	4,883,419		$	446,796		$	5,330,215
	Loans individually evaluated for impairment (1)		18,355			—			18,355
	Total recorded investment		$	4,901,774		$	446,796		$	5,348,570
	(1)	The recorded investment in our MPP conventional loans individually evaluated for impairment excludes principal that was previously paid in full by the servicers as of September 30, 2014 and December 31, 2013 of $8,100 and $13,976, respectively, that remains subject to potential claims by those servicers for any losses resulting from past or future liquidations of the underlying properties. However, the MPP conventional loan allowance for loan losses includes $417 and $895 for these potential claims as of September 30, 2014 and December 31, 2013, respectively.
Credit Quality Indicators. The tables below present our key credit quality indicators for mortgage loans held for portfolio:
Mortgage Loans Held for Portfolio as of September 30, 2014		MPP						MPF
		Conventional			FHA			Conventional			Government			Total
Past due 30-59 days		$	52,697		$	26,125		$	925		$	2,110		$	81,857
Past due 60-89 days		15,006			5,813			1			358			21,178
Past due 90 days or more		54,080			2,070			1			355			56,506
Total past due		121,783			34,008			927			2,823			159,541
Total current		5,167,916			642,865			427,478			103,053			6,341,312
Total mortgage loans, recorded investment		5,289,699			676,873			428,405			105,876			6,500,853
Net unamortized premiums		(95,588		)	(15,865		)	(8,245		)	(1,269		)	(120,967		)
Fair-value hedging adjustments		(4,517		)	(628		)	479			51			(4,615		)
Accrued interest receivable		(21,097		)	(2,463		)	(2,138		)	(441		)	(26,139		)
Total Mortgage Loans Held for Portfolio, UPB		$	5,168,497		$	657,917		$	418,501		$	104,217		$	6,349,132
Other Delinquency Statistics as of September 30, 2014
In process of foreclosure (1)		$	38,315		$	—		$	—		$	—		$	38,315
Serious delinquency rate (2)		1.02		%	0.31		%	—		%	0.34		%	0.87		%
Past due 90 days or more still accruing interest (3)		$	52,231		$	2,070		$	—		$	355		$	54,656
On non-accrual status		2,388			—			1			—			2,389
Mortgage Loans Held for Portfolio as of December 31, 2013		MPP						MPF
		Conventional			FHA			Conventional			Government			Total
Past due 30-59 days		$	55,615		$	38,963		$	179		$	382		$	95,139
Past due 60-89 days		18,203			7,438			1			555			26,197
Past due 90 days or more		76,611			4,234			130			—			80,975
Total past due		150,429			50,635			310			937			202,311
Total current		4,751,345			709,032			446,486			109,010			6,015,873
Total mortgage loans, recorded investment		4,901,774			759,667			446,796			109,947			6,218,184
Net unamortized premiums		(75,381		)	(19,023		)	(9,126		)	(1,503		)	(105,033		)
Fair-value hedging adjustments		(3,593		)	(781		)	488			48			(3,838		)
Accrued interest receivable		(18,502		)	(2,770		)	(2,162		)	(446		)	(23,880		)
Total Mortgage Loans Held for Portfolio, UPB		$	4,804,298		$	737,093		$	435,996		$	108,046		$	6,085,433
Other Delinquency Statistics as of December 31, 2013
In process of foreclosure (1)		$	47,970		$	—		$	—		$	—		$	47,970
Serious delinquency rate (2)		1.56		%	0.56		%	0.03		%	—		%	1.3		%
Past due 90 days or more still accruing interest (3)		$	76,099		$	4,234		$	—		$	—		$	80,333
On non-accrual status		1,174			—			130			—			1,304
(1)	Includes loans for which the decision of foreclosure or similar alternative, such as pursuit of deed-in-lieu of foreclosure, has been reported. Loans in process of foreclosure are included in past due categories depending on their delinquency status.
(2)	Represents loans 90 days or more past due (including loans in process of foreclosure) expressed as a percentage of the total recorded investment in mortgage loans. The percentage excludes principal amounts that were previously paid in full by the servicers on conventional loans that are pending resolution of potential loss claims. Many FHA loans are repurchased by the servicers when they reach 90 days or more delinquent status, similar to the rules for servicers of Ginnie Mae MBS, resulting in the lower serious delinquency rate for FHA loans.
(3)	Although our past due scheduled/scheduled MPP loans are classified as loans past due 90 days or more based on the mortgagor's payment status, we do not consider these loans to be non-accrual.
Troubled Debt Restructurings. The table below presents the recorded investment of the performing and non-performing TDRs. Non-performing represents loans on non-accrual status only.
		September 30, 2014									December 31, 2013
Recorded Investment		Performing			Non-Performing			Total			Performing			Non-Performing			Total
MPP conventional loans		$	18,414		$	723		$	19,137		$	17,407		$	948		$	18,355
The tables below present the pre- and post-modification amounts, which represent the amount of recorded investment as of the date the loans were modified.
Troubled Debt Restructurings at Modification Date		Three Months Ended September 30, 2014						Three Months Ended September 30, 2013
		Pre-Modification			Post-Modification			Pre-Modification			Post-Modification
MPP conventional loans		$	—		$	—		$	767		$	802
Troubled Debt Restructurings at Modification Date		Nine Months Ended September 30, 2014						Nine Months Ended September 30, 2013
		Pre-Modification			Post-Modification			Pre-Modification			Post-Modification
MPP conventional loans		$	2,439		$	2,593		$	4,060		$	4,306
During the three and nine months ended September 30, 2014 and 2013, certain conventional MPP loans classified as TDRs within the previous 12 months experienced a payment default. A borrower is considered to have defaulted on a TDR if the borrower's contractually due principal or interest is 60 days or more past due at any time. The recorded investment of certain conventional MPP loans classified as TDRs within the previous 12 months that experienced a payment default was $0 and $366 for the three months ended September 30, 2014 and 2013, respectively, and $0 and $911 for the nine months ended September 30, 2014 and 2013, respectively. For purposes of this disclosure, only the initial default was included; however, a loan can experience another payment default in a subsequent period.
A loan considered to be a TDR is individually evaluated for impairment when determining its related allowance for loan loss. Credit loss is measured by factoring in expected cash shortfalls as of the reporting date. The tables below present the impaired conventional loans individually evaluated for impairment. The first table presents the recorded investment, UPB and related allowance associated with these loans, while the next tables present the average recorded investment of individually impaired loans and related interest income recognized.
		September 30, 2014									December 31, 2013
Individually Evaluated Impaired Loans		Recorded Investment			UPB			Related Allowance for Loan Losses			Recorded Investment			UPB			Related Allowance for Loan Losses
MPP conventional loans without allowance for loan losses (1)		$	18,414		$	18,248		$	—		$	17,407		$	17,239		$	—
MPP conventional loans with allowance for loan losses		723			710			41			948			928			40
Total		$	19,137		$	18,958		$	41		$	18,355		$	18,167		$	40
(1)	No allowance for loan losses was recorded on these impaired loans after consideration of the underlying loan-specific attribute data, estimated liquidation value of real estate collateral held, estimated costs associated with maintaining and disposing of the collateral, and credit enhancements.
		Three Months Ended						Three Months Ended
		September 30, 2014						September 30, 2013
Individually Evaluated Impaired Loans		Average Recorded Investment			Interest Income Recognized			Average Recorded Investment			Interest Income Recognized
MPP conventional loans without allowance for loan losses		$	18,843		$	267		$	17,447		$	253
MPP conventional loans with allowance for loan losses		725			10			1,143			17
Total		$	19,568		$	277		$	18,590		$	270
		Nine Months Ended						Nine Months Ended
		September 30, 2014						September 30, 2013
Individually Evaluated Impaired Loans		Average Recorded Investment			Interest Income Recognized			Average Recorded Investment			Interest Income Recognized
MPP conventional loans without allowance for loan losses		$	18,389		$	798		$	16,396		$	708
MPP conventional loans with allowance for loan losses		728			40			1,142			82
Total		$	19,117		$	838		$	17,538		$	790
There were no MPF TDRs during the three or nine months ended September 30, 2014 or 2013.
Real Estate Owned. We had no MPF REO recorded in Other Assets on the Statement of Condition at September 30, 2014 or December 31, 2013. During the three months ended September 30, 2014, we liquidated the MPF REO of $117 that was transferred to Other Assets earlier in 2014.

Derivative_and_Hedging_Activit

Derivative and Hedging Activities	9 Months Ended
	Sep. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Instruments and Hedging Activities	'
	Note 9 - Derivatives and Hedging Activities
	Financial Statement Effect and Additional Financial Information.
	Derivative Notional Amounts. The following table presents the notional amount and estimated fair value of derivative instruments, including the effect of netting adjustments, cash collateral, and the related accrued interest.
			Notional			Estimated Fair Value			Estimated Fair Value
			Amount of			of Derivative			of Derivative
	September 30, 2014		Derivatives			Assets			Liabilities
	Derivatives designated as hedging instruments:
	Interest-rate swaps		$	28,823,647		$	87,484		$	375,642
	Total derivatives designated as hedging instruments		28,823,647			87,484			375,642
	Derivatives not designated as hedging instruments:
	Interest-rate swaps		1,454,721			470			1,561
	Interest-rate caps/floors		340,500			295			—
	Interest-rate forwards		159,700			76			46
	MDCs		159,004			250			40
	Total derivatives not designated as hedging instruments		2,113,925			1,091			1,647
	Total derivatives before adjustments		$	30,937,572		88,575			377,289
	Netting adjustments					(81,449		)	(81,449		)
	Cash collateral and related accrued interest					11,863			(203,831		)
	Total adjustments (1)					(69,586		)	(285,280		)
	Total derivatives, net					$	18,989		$	92,009
	December 31, 2013
	Derivatives designated as hedging instruments:
	Interest-rate swaps		$	26,758,882		$	125,431		$	540,995
	Total derivatives designated as hedging instruments		26,758,882			125,431			540,995
	Derivatives not designated as hedging instruments:
	Interest-rate swaps		2,344,743			823			5,706
	Interest-rate caps/floors		340,500			1,327			—
	Interest-rate forwards		61,300			233			11
	MDCs		58,797			12			246
	Total derivatives not designated as hedging instruments		2,805,340			2,395			5,963
	Total derivatives before adjustments		$	29,564,222		127,826			546,958
	Netting adjustments					(119,488		)	(119,488		)
	Cash collateral and related accrued interest					(1,124		)	(317,726		)
	Total adjustments (1)					(120,612		)	(437,214		)
	Total derivatives, net					$	7,214		$	109,744
	(1)	Represents the application of the netting requirements that allow us to settle (i) positive and negative positions and (ii) cash collateral and related accrued interest held or placed, with the same clearing agent and/or counterparty.
	We record derivative instruments, related cash collateral received or pledged, including initial and variation margin, and associated accrued interest, on a net basis by clearing agent and/or by counterparty when we have met the netting requirements. The following table presents separately the estimated fair value of derivative instruments meeting or not meeting netting requirements, including the related collateral received from or pledged to counterparties.
			September 30, 2014						December 31, 2013
			Derivative Assets			Derivative Liabilities			Derivative Assets			Derivative Liabilities
	Derivative instruments meeting netting requirements:
	Gross recognized amount
	Bilateral derivatives		$	81,997		$	361,157		$	122,411		$	544,014
	Cleared derivatives		6,252			16,046			5,170			2,687
	Total gross recognized amount		88,249			377,203			127,581			546,701
	Gross amounts of netting adjustments, cash collateral and related accrued interest
	Bilateral derivatives		(81,449		)	(269,234		)	(121,425		)	(434,527		)
	Cleared derivatives		11,863			(16,046		)	813			(2,687		)
	Total gross amounts of netting adjustments, cash collateral and related accrued interest		(69,586		)	(285,280		)	(120,612		)	(437,214		)
	Net amounts after netting adjustments, cash collateral and related accrued interest
	Bilateral derivatives		548			91,923			986			109,487
	Cleared derivatives		18,115			—			5,983			—
	Total net amounts after netting adjustments, cash collateral and related accrued interest		18,663			91,923			6,969			109,487
	Derivative instruments not meeting netting requirements (1)		326			86			245			257
	Total derivatives, at estimated fair value		$	18,989		$	92,009		$	7,214		$	109,744
	(1)	Includes MDCs and certain interest-rate forwards.
	The following table presents the components of Net Gains (Losses) on Derivatives and Hedging Activities reported in Other Income (Loss):
			Three Months Ended September 30,						Nine Months Ended September 30,
	Type of Hedge		2014			2013			2014			2013
	Net gain (loss) related to fair-value hedge ineffectiveness:
	Interest-rate swaps		$	233		$	(1,353	)	$	(3,286	)	$	8,596
	Total net gain (loss) related to fair-value hedge ineffectiveness		233			(1,353		)	(3,286		)	8,596
	Net gain (loss) on derivatives not designated as hedging instruments:
	Interest-rate swaps		(1,868		)	62			3,903			5,002
Interest-rate caps/floors		(158		)	(405		)	(1,033		)	189
Interest-rate forwards		(365		)	334			(3,790		)	6,119
Net interest settlements		2,955			194			8,395			(4,063		)
MDCs		(120		)	1,043			2,594			(5,172		)
Total net gain (loss) on derivatives not designated as hedging instruments		444			1,228			10,069			2,075
Net Gains (Losses) on Derivatives and Hedging Activities		$	677		$	(125	)	$	6,783		$	10,671
The following table presents, by type of hedged item, the gains (losses) on derivatives and the related hedged items in fair-value hedging relationships and the effect of those derivatives on Net Interest Income:
		Gain (Loss)			Gain (Loss)			Net Fair-				Effect on
		on			on Hedged			Value Hedge				Net Interest
Three Months Ended September 30, 2014		Derivative			Item			Ineffectiveness				Income (1)
Advances		$	45,658		$	(45,938	)	$	(280	)		$	(38,558	)
AFS securities		29,428			(29,991		)	(563		)		(24,487		)
CO Bonds		(13,614		)	14,690			1,076				16,447
Total		$	61,472		$	(61,239	)	$	233			$	(46,598	)
Three Months Ended September 30, 2013
Advances		$	(8,893	)	$	7,160		$	(1,733	)		$	(50,794	)
AFS securities		3,694			(3,524		)	170				(24,196		)
CO Bonds		15,723			(15,513		)	210				21,350
Total		$	10,524		$	(11,877	)	$	(1,353	)		$	(53,640	)
Nine Months Ended September 30, 2014
Advances		$	24,525		$	(24,358	)	$	167			$	(111,842	)
AFS securities		21,569			(22,010		)	(441		)		(73,508		)
CO Bonds		40,374			(43,386		)	(3,012		)		54,634
Total		$	86,468		$	(89,754	)	$	(3,286	)		$	(130,716	)
Nine Months Ended September 30, 2013
Advances		$	197,316		$	(194,821	)	$	2,495			$	(154,036	)
AFS securities		124,730			(122,879		)	1,851				(72,335		)
CO Bonds		(97,336		)	101,586			4,250				64,681
Total		$	224,710		$	(216,114	)	$	8,596			$	(161,690	)
(1)	Includes the effect of derivatives in fair-value hedging relationships on Net Interest Income that is recorded in the Interest Income / Expense line item of the respective hedged items. Excludes the Interest Income / Expense of the respective hedged items, which fully offset the Interest Income / Expense of the derivatives, except to the extent of any hedge ineffectiveness. Net interest settlements on derivatives that are not in fair-value hedging relationships are reported in Other Income (Loss).
Managing Credit Risk on Derivatives. We are subject to credit risk due to the risk of nonperformance by the counterparties to our derivative transactions.
For our bilateral derivatives, we have credit support agreements that contain provisions requiring us to post additional collateral with our counterparties if there is deterioration in our credit rating. If our credit rating is lowered by an NRSRO, we could be required to deliver additional collateral on bilateral derivative instruments in net liability positions. The aggregate estimated fair value of all bilateral derivative instruments with credit risk-related contingent features that were in a net liability position (before cash collateral and related accrued interest on cash collateral) at September 30, 2014 was $283,752 for which we have posted collateral, including accrued interest, with an estimated fair value of $191,855 in the normal course of business. In addition, we held other bilateral derivative instruments in a net liability position of $86 that are not subject to credit support agreements containing credit risk-related contingent features. If our credit rating had been lowered by an NRSRO (from an S&P equivalent of AA+ to AA), we could have been required to deliver up to an additional $858 of collateral (at estimated fair value) to our bilateral derivative counterparties at September 30, 2014.
For cleared derivatives, the Clearinghouse determines initial margin requirements, and generally credit ratings are not factored into the initial margin. However, clearing agents may require additional initial margin to be posted based on credit considerations, including, but not limited to, credit rating downgrades. We were not required to post additional initial margin by our clearing agents at September 30, 2014.

Consolidated_Obligations

Consolidated Obligations	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Consolidated Obligations	'
	Note 10 - Consolidated Obligations
	Although we are primarily liable for our portion of Consolidated Obligations (i.e., those issued on our behalf), we are also jointly and severally liable with the other 11 FHLBanks for the payment of the principal and interest on all Consolidated Obligations of each of the FHLBanks. The par values of the 12 FHLBanks' outstanding Consolidated Obligations totaled $816.9 billion and $766.8 billion at September 30, 2014 and December 31, 2013, respectively.
	Discount Notes. Our participation in Discount Notes, all of which are due within one year of issuance, was as follows:
	Discount Notes	September 30,			December 31,
		2014			2013
	Book value	$	10,105,640		$	7,434,890
	Par value	10,107,866			7,435,940
	Weighted average effective interest rate	0.1		%	0.12		%
	CO Bonds. The following table presents our participation in CO Bonds outstanding by contractual maturity:
		September 30, 2014						December 31, 2013
	Year of Contractual Maturity	Amount			WAIR%			Amount			WAIR%
	Due in 1 year or less	$	12,548,950		0.4			$	12,459,650		0.43
	Due after 1 year through 2 years	2,390,500			1.18			1,940,550			1.27
	Due after 2 years through 3 years	2,061,850			1.3			1,359,400			1.93
	Due after 3 years through 4 years	2,208,500			1.93			1,539,200			2.08
	Due after 4 years through 5 years	1,014,300			2.44			1,690,100			1.56
	Thereafter	6,710,000			3.04			7,654,200			2.92
	Total CO Bonds, par value	26,934,100			1.4			26,643,100			1.45
	Unamortized premiums	26,589						32,455
	Unamortized discounts	(15,468		)				(16,031		)
	Fair-value hedging adjustments	(31,126		)				(75,599		)
	Total CO Bonds	$	26,914,095					$	26,583,925
	The following tables present our participation in CO Bonds outstanding by redemption feature and contractual maturity or next call date:
	Redemption Feature	September 30,			December 31,
		2014			2013
	Non-callable / non-putable	$	18,922,100		$	17,677,100
	Callable	8,012,000			8,966,000
	Total CO Bonds, par value	$	26,934,100		$	26,643,100
	Year of Contractual Maturity or Next Call Date	September 30,			December 31,
		2014			2013
	Due in 1 year or less	$	20,550,950		$	20,900,650
	Due after 1 year through 2 years	2,260,500			1,583,550
	Due after 2 years through 3 years	839,850			954,400
	Due after 3 years through 4 years	667,500			649,200
	Due after 4 years through 5 years	556,300			283,100
	Thereafter	2,059,000			2,272,200
	Total CO Bonds, par value	$	26,934,100		$	26,643,100

Affordable_Housing_Program

Affordable Housing Program	9 Months Ended
	Sep. 30, 2014
Affordable Housing Program [Abstract]	'
Affordable Housing Program	'
	Note 11 - Affordable Housing Program
	The following table summarizes the activity in our AHP funding obligation:
			Three Months Ended September 30,						Nine Months Ended September 30,
	AHP Activity		2014			2013			2014			2013
	Balance at beginning of period		$	43,351		$	41,050		$	42,778		$	34,362
	Assessment expense		3,765			3,442			11,270			16,066
	Subsidy usage, net (1)		(5,431		)	(4,718		)	(12,363		)	(10,654		)
	Balance at end of period		$	41,685		$	39,774		$	41,685		$	39,774
	(1)	Subsidies disbursed are reported net of returns/recaptures of previously disbursed subsidies.

Capital

Capital	9 Months Ended
	Sep. 30, 2014
Capital [Abstract]	'
Capital	'
	Note 12 - Capital
	We are subject to capital requirements under our capital plan and the Finance Agency regulations as disclosed in Note 16 - Capital in our 2013 Form 10-K. As presented in the following table, we were in compliance with the Finance Agency's capital requirements at September 30, 2014 and December 31, 2013. For regulatory purposes, AOCI is not considered capital; MRCS, however, is considered capital.
		September 30, 2014						December 31, 2013
	Regulatory Capital Requirements	Required			Actual			Required			Actual
	Risk-based capital	$	624,819		$	2,541,804		$	764,917		$	2,378,670
	Regulatory permanent capital-to-asset ratio	4		%	6.19		%	4		%	6.3		%
	Regulatory permanent capital	$	1,641,526		$	2,541,804		$	1,511,448		$	2,378,670
	Leverage ratio	5		%	9.29		%	5		%	9.44		%
	Leverage capital	$	2,051,908		$	3,812,706		$	1,889,310		$	3,568,005
	Mandatorily Redeemable Capital Stock. At September 30, 2014 and December 31, 2013, we had $16,137 and $16,787, respectively, in capital stock subject to mandatory redemption, which is classified as a liability in the Statement of Condition. There were eight and seven former members holding MRCS at September 30, 2014 and December 31, 2013, respectively.
	The following table presents the activity in MRCS:
		Three Months Ended September 30,						Nine Months Ended September 30,
	MRCS Activity	2014			2013			2014			2013
	Liability at beginning of period	$	16,785		$	255,720		$	16,787		$	450,716
	Additions due to change in membership status	47			—			47			95,441
	Redemptions/repurchases	(695		)	(401		)	(697		)	(290,975		)
	Accrued dividends	—			—			—			137
	Liability at end of period	$	16,137		$	255,319		$	16,137		$	255,319
	During the nine months ended September 30, 2013, we repurchased $250,000 of excess stock held by former members (or their successors-in-interest) under a redemption request. In addition, during the nine months ended September 30, 2013, we redeemed $40,975 of excess stock held by former members because the stock had reached the end of its five-year redemption period.
	The following table presents the distributions on MRCS:
		Three Months Ended September 30,						Nine Months Ended September 30,
	MRCS Distributions	2014			2013			2014			2013
	Recorded as Interest Expense	$	129		$	2,225		$	874		$	6,713
	Recorded as distributions from Retained Earnings	—			—			—			137
	Total	$	129		$	2,225		$	874		$	6,850
	Excess Capital Stock. Excess capital stock is defined as the amount of stock held by a member or former member in excess of that institution's stock requirement. Finance Agency rules limit the ability of an FHLBank to create member excess stock under certain circumstances, including when its total excess stock exceeds 1% of Total Assets or if the issuance of excess stock would cause total excess stock to exceed 1% of Total Assets. Our excess stock totaled $593,088 at September 30, 2014, which was 1.4% of our Total Assets. Therefore, we are currently not permitted to issue new excess stock to members or distribute stock dividends.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income	9 Months Ended
	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Abstract]	'
Accumulated Other Comprehensive Income	'
	Note 13 - Accumulated Other Comprehensive Income
	The following table presents a summary of the changes in the components of AOCI for the three and nine months ended September 30, 2014 and 2013:
	AOCI Rollforward	Unrealized Gains (Losses) on AFS Securities (Note 3)			Non-Credit OTTI on AFS Securities (Notes 3 and 5)			Non-Credit OTTI on HTM Securities			Pension Benefits			Total AOCI
								(Notes 4 and 5)
	Balance, June 30, 2013	$	475		$	15,425		$	(275	)	$	(11,698	)	$	3,927
	OCI before reclassifications:
	Net change in unrealized gains (losses)	2,392			2,474			—			—			4,866
	Net change in fair value	—			(84		)	—			—			(84		)
	Accretion of non-credit loss	—			—			18			—			18
	Reclassifications from OCI to Net Income:
	Net realized gains from sale of AFS securities	—			—			—			—			—
	Pension Benefits	—			—			—			6,175			6,175
	Total Other Comprehensive Income	2,392			2,390			18			6,175			10,975
	Balance, September 30, 2013	$	2,867		$	17,815		$	(257	)	$	(5,523	)	$	14,902
	Balance, June 30, 2014	$	12,894		$	38,856		$	(209	)	$	(4,364	)	$	47,177
	OCI before reclassifications:
	Net change in unrealized gains (losses)	9,696			569			—			—			10,265
	Net change in fair value	—			(46		)	—			—			(46		)
	Accretion of non-credit loss	—			—			22			—			22
	Reclassifications from OCI to Net Income:
	Non-credit portion of OTTI losses	—			42			—			—			42
	Pension Benefits	—			—			—			(36		)	(36		)
	Total Other Comprehensive Income	9,696			565			22			(36		)	10,247
	Balance, September 30, 2014	$	22,590		$	39,421		$	(187	)	$	(4,400	)	$	57,424
	AOCI Rollforward	Unrealized Gains (Losses) on AFS Securities (Note 3)			Non-Credit OTTI on AFS Securities (Notes 3 and 5)			Non-Credit OTTI on HTM Securities			Pension Benefits			Total AOCI
								(Notes 4 and 5)
	Balance, December 31, 2012	$	12,335		$	(9,684	)	$	(312	)	$	(12,397	)	$	(10,058	)
	OCI before reclassifications:
	Net change in unrealized gains (losses)	(9,468		)	7,615			—			—			(1,853		)
	Net change in fair value	—			35,095			—			—			35,095
	Accretion of non-credit loss	—			—			55			—			55
	Reclassifications from OCI to Net Income:
	Net realized gains from sale of AFS securities	—			(17,135		)	—			—			(17,135		)
	Non-credit portion of OTTI losses	—			1,924			—			—			1,924
	Pension Benefits	—			—			—			6,874			6,874
	Total Other Comprehensive Income	(9,468		)	27,499			55			6,874			24,960
	Balance, September 30, 2013	$	2,867		$	17,815		$	(257	)	$	(5,523	)	$	14,902
	Balance, December 31, 2013	$	317		$	25,936		$	(241	)	$	(4,292	)	$	21,720
	OCI before reclassifications:
	Net change in unrealized gains (losses)	22,273			13,442			—			—			35,715
	Net change in fair value	—			(227		)	—			—			(227		)
	Accretion of non-credit loss	—			—			54			—			54
	Reclassifications from OCI to Net Income:
	Non-credit portion of OTTI losses	—			270			—			—			270
	Pension Benefits	—			—			—			(108		)	(108		)
	Total Other Comprehensive Income	22,273			13,485			54			(108		)	35,704
	Balance, September 30, 2014	$	22,590		$	39,421		$	(187	)	$	(4,400	)	$	57,424

Segment_Information

Segment Information	9 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
Segment Information	'
	Note 14 - Segment Information
	The following table presents our financial performance by operating segment:
		Three Months Ended September 30, 2014								Three Months Ended September 30, 2013
		Traditional		Mortgage Loans			Total			Traditional			Mortgage Loans			Total
	Net Interest Income	$	30,128	$	17,130		$	47,258		$	34,486		$	17,640		$	52,126
	Provision for (Reversal of) Credit Losses	—		(126		)	(126		)	—			314			314
	Other Income (Loss)	7,266		(446		)	6,820			(856		)	1,407			551
	Other Expenses	14,565		2,122			16,687			18,324			1,841			20,165
	Income Before Assessments	22,829		14,688			37,517			15,306			16,892			32,198
	Affordable Housing Program Assessments	2,296		1,469			3,765			1,753			1,689			3,442
	Net Income	$	20,533	$	13,219		$	33,752		$	13,553		$	15,203		$	28,756
		Nine Months Ended September 30, 2014								Nine Months Ended September 30, 2013
		Traditional		Mortgage Loans			Total			Traditional			Mortgage Loans			Total
	Net Interest Income	$	89,080	$	48,354		$	137,434		$	112,715		$	60,418		$	173,133
	Provision for (Reversal of) Credit Losses	—		(916		)	(916		)	—			(3,451		)	(3,451		)
	Other Income (Loss)	23,732		(1,065		)	22,667			27,359			1,104			28,463
	Other Expenses	42,808		6,386			49,194			46,347			4,751			51,098
	Income Before Assessments	70,004		41,819			111,823			93,727			60,222			153,949
	Affordable Housing Program Assessments	7,088		4,182			11,270			10,044			6,022			16,066
	Net Income	$	62,916	$	37,637		$	100,553		$	83,683		$	54,200		$	137,883
	The following table presents asset balances by operating segment:
	By Date	Traditional		Mortgage Loans			Total
	September 30, 2014	$	34,566,441	$	6,471,714		$	41,038,155
	December 31, 2013	31,596,386		6,189,804			37,786,190

Estimated_Fair_Values

Estimated Fair Values	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Estimated Fair Values	'
	Note 15 - Estimated Fair Values
	We review the fair value hierarchy classifications of our financial instruments on a quarterly basis. Changes in the observability of the inputs may result in a reclassification of certain assets or liabilities. Such reclassifications are reported as transfers in/out at estimated fair value as of the beginning of the quarter in which the changes occur. As described below, we reclassified six AFS securities from Level 3 to Level 2 during the nine months ended September 30, 2013. There were no such reclassifications during the three or nine months ended September 30, 2014 or the three months ended September 30, 2013.
	The following tables present the carrying value and estimated fair value of each of our financial instruments. The total of the estimated fair values does not represent an estimate of our overall market value as a going concern, which would take into account future business opportunities and the net profitability of assets and liabilities, among other considerations.
			September 30, 2014
						Estimated Fair Value
			Carrying															Netting
	Financial Instruments		Value			Total			Level 1			Level 2			Level 3			Adjustment (1)
	Assets:
	Cash and Due from Banks		$	4,444,619		$	4,444,619		$	4,444,619		$	—		$	—		$	—
	Interest-Bearing Deposits		285			285			—			285			—			—
	AFS Securities		3,574,036			3,574,036			—			3,155,189			418,847			—
	HTM Securities		7,072,395			7,190,400			—			7,067,563			122,837			—
	Advances		19,324,702			19,384,314			—			19,384,314			—			—
	Mortgage Loans Held for Portfolio, net		6,471,714			6,678,052			—			6,632,312			45,740			—
	Accrued Interest Receivable		79,329			79,329			—			79,329			—			—
	Derivative Assets, net		18,989			18,989			—			88,575			—			(69,586		)
	Grantor Trust Assets (included in Other Assets)		12,906			12,906			12,906			—			—			—
	Liabilities:
	Deposits		1,020,313			1,020,313			—			1,020,313			—			—
	Consolidated Obligations:
	Discount Notes		10,105,640			10,107,866			—			10,107,866			—			—
	CO Bonds		26,914,095			27,163,745			—			27,163,745			—			—
	Accrued Interest Payable		82,089			82,089			—			82,089			—			—
	Derivative Liabilities, net		92,009			92,009			—			377,289			—			(285,280		)
	MRCS		16,137			16,137			16,137			—			—			—
			December 31, 2013
						Estimated Fair Value
			Carrying															Netting
	Financial Instruments		Value			Total			Level 1			Level 2			Level 3			Adjustment (1)
	Assets:
	Cash and Due from Banks		$	3,318,564		$	3,318,564		$	3,318,564		$	—		$	—		$	—
	Interest-Bearing Deposits		485			485			—			485			—			—
	AFS Securities		3,632,835			3,632,835			—			3,163,150			469,685			—
	HTM Securities		7,146,250			7,244,318			—			7,083,333			160,985			—
	Advances		17,337,418			17,428,710			—			17,428,710			—			—
	Mortgage Loans Held for Portfolio, net		6,189,804			6,272,905			—			6,228,216			44,689			—
	Accrued Interest Receivable		79,072			79,072			—			79,072			—			—
	Derivative Assets, net		7,214			7,214			—			127,826			—			(120,612		)
	Grantor Trust Assets (included in Other Assets)		12,483			12,483			12,483			—			—			—
	Liabilities:
	Deposits		1,066,632			1,066,632			—			1,066,632			—			—
	Consolidated Obligations:
	Discount Notes		7,434,890			7,435,940			—			7,435,940			—			—
	CO Bonds		26,583,925			26,503,918			—			26,503,918			—			—
	Accrued Interest Payable		80,757			80,757			—			80,757			—			—
	Derivative Liabilities, net		109,744			109,744			—			546,958			—			(437,214		)
	MRCS		16,787			16,787			16,787			—			—			—
	(1)	Represents the application of the netting requirements that allow us to settle (i) positive and negative positions and (ii) cash collateral and related accrued interest held or placed, with the same clearing agent and/or counterparty.
	Summary of Valuation Techniques and Significant Inputs. A description of the valuation techniques, significant inputs, and levels of fair value hierarchy is disclosed in Note 20 - Estimated Fair Values in our 2013 Form 10-K. No changes have been made in the current year, except as disclosed below.
	Real Estate Owned. The fair value of REO is estimated on a non-recurring basis using a current property value from an NRSRO model adjusted for estimated selling costs and expected PMI proceeds. We had no REO outstanding at September 30, 2014 or December 31, 2013.
	AFS and HTM Securities - non-MBS. Beginning in the third quarter of 2014, the estimated fair value incorporates prices from up to four designated third-party pricing vendors and follows the same process we use for AFS and HTM Securities - MBS as disclosed in Note 20 - Estimated Fair Values in our 2013 Form 10-K. We previously used market-observable price quotes from third-party pricing vendors, such as the Composite Bloomberg Bond Trade screen. This change did not have a significant impact on the estimated fair values of these securities as of September 30, 2014.
	Estimated Fair Value Measurements. The following tables present by level within the fair value hierarchy the estimated fair value of our financial assets and liabilities that are recorded at estimated fair value on a recurring or non-recurring basis on our Statement of Condition. We did not have any financial assets or liabilities recorded at estimated fair value on a non-recurring basis on our Statement of Condition as of September 30, 2014 or December 31, 2013.
															Netting
	September 30, 2014		Total			Level 1			Level 2			Level 3			Adjustment (1)
	AFS Securities:
	GSE and TVA debentures		$	3,155,189		$	—		$	3,155,189		$	—		$	—
	Private-label RMBS		418,847			—			—			418,847			—
	Total AFS Securities		3,574,036			—			3,155,189			418,847			—
	Derivative Assets:
	Interest-rate related		18,663			—			88,249			—			(69,586		)
	Interest-rate forwards		76			—			76			—			—
	MDCs		250			—			250			—			—
	Total Derivative Assets, net		18,989			—			88,575			—			(69,586		)
Grantor Trust Assets (included in Other Assets)		12,906			12,906			—			—			—
Total recurring assets at estimated fair value		$	3,605,931		$	12,906		$	3,243,764		$	418,847		$	(69,586	)
Derivative Liabilities:
Interest-rate related		$	91,923		$	—		$	377,203		$	—		$	(285,280	)
Interest-rate forwards		46			—			46			—			—
MDCs		40			—			40			—			—
Total Derivative Liabilities, net		92,009			—			377,289			—			(285,280		)
Total recurring liabilities at estimated fair value		$	92,009		$	—		$	377,289		$	—		$	(285,280	)
December 31, 2013
AFS Securities:
GSE and TVA debentures		$	3,163,150		$	—		$	3,163,150		$	—		$	—
Private-label RMBS		469,685			—			—			469,685			—
Total AFS Securities		3,632,835			—			3,163,150			469,685			—
Derivative Assets:
Interest-rate related		6,969			—			127,581			—			(120,612		)
Interest-rate forwards		233			—			233			—			—
MDCs		12			—			12			—			—
Total Derivative Assets, net		7,214			—			127,826			—			(120,612		)
Grantor Trust Assets (included in Other Assets)		12,483			12,483			—			—			—
Total recurring assets at estimated fair value		$	3,652,532		$	12,483		$	3,290,976		$	469,685		$	(120,612	)
Derivative Liabilities:
Interest-rate related		$	109,487		$	—		$	546,701		$	—		$	(437,214	)
Interest-rate forwards		11			—			11			—			—
MDCs		246			—			246			—			—
Total Derivative Liabilities, net		109,744			—			546,958			—			(437,214		)
Total recurring liabilities at estimated fair value		$	109,744		$	—		$	546,958		$	—		$	(437,214	)
(1)	Represents the application of the netting requirements that allow us to settle positive and negative positions and also cash collateral and related accrued interest held or placed with the same clearing agent and/or counterparty.
Level 3 Disclosures for All Assets and Liabilities that are Measured at Fair Value on a Recurring Basis. The table below presents a rollforward of our AFS private-label RMBS measured at estimated fair value on a recurring basis using Level 3 significant inputs. The estimated fair values for the private-label RMBS were determined using a pricing source, such as a dealer quote or comparable security price, for which the significant unobservable inputs used to determine the price were not reasonably available.
		Three Months Ended September 30,						Nine Months Ended September 30,
Level 3 Rollforward		2014			2013			2014			2013
Balance, beginning of period		$	442,712		$	511,952		$	469,685		$	640,142
Total realized and unrealized gains (losses):
Accretion of credit losses in Interest Income		872			37			1,746			95
Net gains (losses) on changes in fair value in Other Income (Loss)		(42		)	—			(270		)	—
Net change in fair value not in excess of cumulative non-credit losses in OCI		(46		)	(84		)	(227		)	12,625
Unrealized gains (losses) in OCI		569			2,474			13,442			16,843
Reclassification of non-credit portion in OCI to Other Income (Loss)		42			—			270			—
Purchases, issuances, sales and settlements:
Settlements		(25,260		)	(25,810		)	(65,799		)	(56,957		)
Transfers out		—			—			—			(124,179		)
Balance, end of period		$	418,847		$	488,569		$	418,847		$	488,569
Net gains (losses) included in earnings attributable to changes in fair value relating to assets still held at end of period		$	830		$	37		$	1,476		$	95
We classified the six securities we sold on April 4, 2013 as Level 2 within the fair value hierarchy as of March 31, 2013 because the estimated fair values were derived from and corroborated by the sales prices in actual market transactions. The total estimated fair value of these six securities that we transferred from Level 3 to Level 2 was $124,179 as of January 1, 2013, the beginning of the quarter in which the transfer occurred.

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Note 16 - Commitments and Contingencies
	The following table presents our off-balance-sheet commitments at their notional amounts:
			September 30, 2014
	Type of Commitment		Expire within one year		Expire after one year		Total
	Letters of credit outstanding		$	104,450	$	150,703	$	255,153
	Unused lines of credit		822,299		—		822,299
	Commitments to fund additional Advances (1)		20,000		—		20,000
	Commitments to fund or purchase mortgage loans		159,004		—		159,004
	Unsettled CO Bonds, at par (2)		452,750		—		452,750
	(1)	Generally for periods up to six months.
	(2)	Includes $405,000 hedged with associated interest-rate swaps.
	Pledged Collateral. At September 30, 2014 and December 31, 2013, we had pledged cash collateral, at par, of $219,750 and $321,423, respectively, to counterparties and clearing agents. At September 30, 2014 and December 31, 2013, we had not pledged any securities as collateral.
	Legal Proceedings. We are subject to legal proceedings arising in the normal course of business. After consultation with legal counsel, management does not anticipate that the ultimate liability, if any, arising out of these proceedings will have a material effect on our financial condition or results of operations.
	In 2010, we filed a complaint asserting claims against several entities for negligent misrepresentation and violations of state and federal securities law occurring in connection with the sale of private-label RMBS to us. In 2013 and 2014, we executed confidential settlement agreements with certain defendants in this litigation, pursuant to which we have dismissed pending claims against, and provided legal releases to, certain entities with respect to applicable securities at issue in the litigation, in consideration of our receipt of cash payments on behalf of those defendants. These payments, including distributions relating to two settlements reached in 2013, totaled $5,532 and $14,080, net of legal fees and litigation expenses, for the three and nine months ended September 30, 2014, respectively, and were recorded in Other Income. No such payments were received during the three or nine months ended September 30, 2013.
	Additional discussion of other commitments and contingencies is provided in Note 6 - Advances; Note 7 - Mortgage Loans Held for Portfolio; Note 9 - Derivatives and Hedging Activities; Note 10 - Consolidated Obligations; Note 12 - Capital; and Note 15 - Estimated Fair Values.

Transactions_with_Related_Part

Transactions with Related Parties	9 Months Ended
	Sep. 30, 2014
Related Party Transactions [Abstract]	'
Transactions with Related Parties	'
	Note 17 - Transactions with Related Parties
	For financial reporting purposes, we define related parties as those members, and former members and their affiliates, with capital stock outstanding in excess of 10% of our total outstanding Capital Stock and MRCS. The following table presents the outstanding balances with respect to transactions with related parties and their balances as a percent of the total balance on our Statement of Condition.
			Capital Stock and MRCS					Advances							Mortgage Loans Held for Portfolio (1)
	September 30, 2014		Balance,			% of Total		Balance,				% of Total			UPB		% of Total
			par value					par value
	Flagstar Bank, FSB		$	209,737		12	%	$	150,000			1	%		$	471,029	7	%
	Total		$	209,737		12	%	$	150,000			1	%		$	471,029	7	%
	December 31, 2013
	Flagstar Bank, FSB		$	209,737		13	%	$	988,000			6	%		$	537,426	9	%
	Total		$	209,737		13	%	$	988,000			6	%		$	537,426	9	%
	(1)	Represents UPB of mortgage loans purchased from related party.
	We had net Advances to (repayments from) related parties as follows:
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
	Related Party		2014			2013			2014				2013
	Flagstar Bank, FSB		$	(881,705	)	$	7,598		$	(838,000	)		$	(272,402	)
	We did not acquire any mortgage loans from related parties during the three or nine months ended September 30, 2014 or 2013.
	Transactions with Directors' Financial Institutions. The following table presents the outstanding balances with respect to transactions with directors' financial institutions and their balance as a percent of the total balance on our Statement of Condition.
			Capital Stock and MRCS					Advances							Mortgage Loans Held for Portfolio (1)
	Date		Balance,			% of Total		Balance,				% of Total			UPB		% of Total
			par value					par value
	September 30, 2014		$	51,838		3	%	$	269,336			1	%		$	161,719	3	%
	December 31, 2013		40,842			3	%	234,394				1	%		82,172		1	%
	(1)	Represents UPB of mortgage loans purchased from Directors' Financial Institutions.
	Net Advances to (repayments from) directors' financial institutions and mortgage loans purchased from directors' financial institutions, taking into account the dates of the directors' appointments and term endings, were as follows:
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
	Transactions with Directors' Financial Institutions		2014			2013			2014				2013
	Net Advances (repayments)		$	18,178		$	13,678		$	(6,558	)		$	(108,340	)
	Mortgage loans purchased		14,557			8,110			29,212				21,271
	Transactions with Other FHLBanks. During the three and nine months ended September 30, 2014, we purchased $0 and $11,011, respectively, of participation interests from the FHLBank of Topeka in mortgage loans originated by its members under the MPF program, compared with $53,581 and $309,477 for the three and nine months ended September 30, 2013, respectively.
	Beginning in July 2012, we pay an MPF Provider fee to the FHLBank of Chicago for our participation in the MPF program that is recorded in Other Expenses. For the three and nine months ended September 30, 2014, we paid such fees of $73 and $223, respectively, compared to $68 and $160, respectively, for the three and nine months ended September 30, 2013.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
Basis of Accounting, Policy	'
	Basis of Presentation. The accompanying interim financial statements of the Federal Home Loan Bank of Indianapolis have been prepared in accordance with GAAP, and the instructions promulgated by the SEC, for interim financial information. Accordingly, they do not include all of the information and disclosures required by GAAP for complete financial statements.
Reclassifications, Policy	'
	Reclassifications. We have reclassified certain amounts from the prior periods to conform to the current period presentation. These reclassifications had no effect on Net Income, Total Comprehensive Income, Total Capital, or net Cash Flows.
Use of Estimates, Policy	'
	Use of Estimates. The preparation of financial statements in accordance with GAAP requires us to make subjective assumptions and estimates that may affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities, and the reported amounts of income and expense. Although the reported amounts and disclosures reflect our best estimates, actual results could differ significantly from these estimates.
Financial Instruments Meeting Netting Requirements, Policy	'
	Financial Instruments Meeting Netting Requirements. We present certain financial instruments, including derivative instruments and securities purchased under agreements to resell, on a net basis when we have a legal right of offset and all other requirements for netting are met (collectively referred to as the netting requirements). For these financial instruments, we have elected to offset our derivative asset and liability positions, as well as cash collateral received or pledged, when we have met the netting requirements.
AFS and HTM Securities- non-MBS, Policy	'
	AFS and HTM Securities - non-MBS. Beginning in the third quarter of 2014, the estimated fair value incorporates prices from up to four designated third-party pricing vendors and follows the same process we use for AFS and HTM Securities - MBS as disclosed in Note 20 - Estimated Fair Values in our 2013 Form 10-K. We previously used market-observable price quotes from third-party pricing vendors, such as the Composite Bloomberg Bond Trade screen.

AvailableforSale_Securities_Ta

Available-for-Sale Securities (Tables)	9 Months Ended
	Sep. 30, 2014
Available-for-sale Securities [Line Items]	'
Available-for-Sale (AFS) Securities by Major Security Type	'
	The following table presents information on our AFS securities:
								Gross		Gross
			Amortized		Non-Credit			Unrealized		Unrealized			Estimated
	September 30, 2014		Cost (1)		OTTI			Gains		Losses			Fair Value
	GSE and TVA debentures		$	3,132,599	$	—		$	22,590	$	—		$	3,155,189
	Private-label RMBS		379,426		(192		)	39,613		—			418,847
	Total AFS securities		$	3,512,025	$	(192	)	$	62,203	$	—		$	3,574,036
	December 31, 2013
	GSE and TVA debentures		$	3,162,833	$	—		$	6,623	$	(6,306	)	$	3,163,150
	Private-label RMBS		443,749		(234		)	26,170		—			469,685
	Total AFS securities		$	3,606,582	$	(234	)	$	32,793	$	(6,306	)	$	3,632,835
	(1)	Includes adjustments made to the cost basis of an investment for accretion, amortization, collection of principal, and, if applicable, OTTI recognized in earnings (credit losses) and fair-value hedge accounting adjustments.
Schedule of Realized Gains (Losses)	'
	There were no sales of AFS securities during the three and nine months ended September 30, 2014. However, on April 4, 2013, we sold six OTTI AFS securities, only one of which was in an unrealized loss position. Prior to the sale, we recorded an OTTI credit charge for this security, representing the entire difference between our amortized cost basis and its estimated fair value, which resulted in no gross realized losses from this sale.
			Three Months Ended September 30,					Nine Months Ended September 30,
	Sales of AFS Securities		2014		2013			2014		2013
	Proceeds from sale		$	—	$	—		$	—	$	129,471
	Previously recognized OTTI credit losses including accretion		—		—			—		38,806
	Gross realized gains		—		—			—		17,135
	Gross realized losses		—		—			—		—
	Net Realized Gains from Sale of Available-for-Sale Securities		$	—	$	—		$	—	$	17,135
Available-for-sale Securities [Member]	'
Available-for-sale Securities [Line Items]	'
AFS Securities in a Continuous Unrealized Loss Position	'
	The following table presents impaired AFS securities (i.e., in an unrealized loss position), which are aggregated by major security type and length of time that individual securities have been in a continuous unrealized loss position.
			Less than 12 months					12 months or more					Total
			Estimated		Unrealized			Estimated		Unrealized			Estimated		Unrealized
	September 30, 2014		Fair Value		Losses			Fair Value		Losses			Fair Value		Losses
	GSE and TVA debentures		$	—	$	—		$	—	$	—		$	—	$	—
	Private-label RMBS		—		—			5,869		(192		)	5,869		(192		)
	Total impaired AFS securities		$	—	$	—		$	5,869	$	(192	)	$	5,869	$	(192	)
	December 31, 2013
	GSE and TVA debentures		$	880,095	$	(6,306	)	$	—	$	—		$	880,095	$	(6,306	)
	Private-label RMBS		—		—			7,135		(234		)	7,135		(234		)
	Total impaired AFS securities		$	880,095	$	(6,306	)	$	7,135	$	(234	)	$	887,230	$	(6,540	)
AFS Securities by Contractual Maturity	'
	The amortized cost and estimated fair value of non-MBS AFS securities by contractual maturity are presented below. MBS are not presented by contractual maturity because their actual maturities will likely differ from contractual maturities as borrowers have the right to prepay their obligations with or without prepayment fees.
			September 30, 2014					December 31, 2013
			Amortized		Estimated			Amortized		Estimated
	Year of Contractual Maturity		Cost		Fair Value			Cost		Fair Value
	Due after one year through five years		$	2,492,564	$	2,506,984		$	2,046,472	$	2,052,348
	Due after five years through ten years		640,035		648,205			1,083,608		1,078,558
	Due after ten years		—		—			32,753		32,244
	Total Non-MBS		3,132,599		3,155,189			3,162,833		3,163,150
	Total MBS		379,426		418,847			443,749		469,685
	Total AFS securities		$	3,512,025	$	3,574,036		$	3,606,582	$	3,632,835

HeldtoMaturity_Securities_Tabl

Held-to-Maturity Securities (Tables)	9 Months Ended
	Sep. 30, 2014
Schedule of Held-to-maturity Securities [Line Items]	'
HTM Securities by Major Security Type	'
	The following table presents information on our HTM securities:
										Gross			Gross
										Unrecognized			Unrecognized
			Amortized		Non-Credit			Carrying		Holding			Holding			Estimated
	September 30, 2014		Cost (1)		OTTI			Value (2)		Gains (3)			Losses (3)			Fair Value
	GSE debentures		$	268,999	$	—		$	268,999	$	257		$	—		$	269,256
	RMBS and ABS:
	Other U.S. obligations -guaranteed RMBS		3,042,915		—			3,042,915		40,774			(2,365		)	3,081,324
	GSE RMBS		3,635,901		—			3,635,901		83,087			(2,005		)	3,716,983
	Private-label RMBS		111,369		—			111,369		566			(1,095		)	110,840
	Manufactured housing loan ABS		11,618		—			11,618		—			(1,241		)	10,377
	Home equity loan ABS		1,780		(187		)	1,593		112			(85		)	1,620
	Total RMBS and ABS		6,803,583		(187		)	6,803,396		124,539			(6,791		)	6,921,144
	Total HTM securities		$	7,072,582	$	(187	)	$	7,072,395	$	124,796		$	(6,791	)	$	7,190,400
	December 31, 2013
	GSE debentures		$	268,998	$	—		$	268,998	$	399		$	—		$	269,397
	RMBS and ABS:
	Other U.S. obligations -guaranteed RMBS		3,119,458		—			3,119,458		45,171			(7,406		)	3,157,223
	GSE RMBS		3,592,695		—			3,592,695		70,572			(6,554		)	3,656,713
	Private-label RMBS		150,287		—			150,287		185			(2,663		)	147,809
	Manufactured housing loan ABS		12,933		—			12,933		—			(1,590		)	11,343
	Home equity loan ABS		2,120		(241		)	1,879		67			(113		)	1,833
	Total RMBS and ABS		6,877,493		(241		)	6,877,252		115,995			(18,326		)	6,974,921
	Total HTM securities		$	7,146,491	$	(241	)	$	7,146,250	$	116,394		$	(18,326	)	$	7,244,318
	(1)	Includes adjustments made to the cost basis of an investment for accretion, amortization, collection of principal, and, if applicable, OTTI recognized in earnings (credit losses).
	(2)	Represents amortized cost after adjustment for non-credit OTTI recognized in AOCI.
	(3)	Represents the difference between estimated fair value and carrying value.
Held-to-maturity Securities [Member]	'
Schedule of Held-to-maturity Securities [Line Items]	'
HTM Securities in a Continuous Unrealized Loss Position	'
	The following table presents impaired HTM securities (i.e., in an unrealized loss position), aggregated by major security type and length of time that individual securities have been in a continuous unrealized loss position. None of our non-MBS were in an unrealized loss position at September 30, 2014 or December 31, 2013.
			Less than 12 months					12 months or more					Total
			Estimated		Unrealized			Estimated		Unrealized			Estimated			Unrealized
	September 30, 2014		Fair Value		Losses			Fair Value		Losses			Fair Value			Losses (1)
	RMBS and ABS:
	Other U.S. obligations - guaranteed RMBS		$	—	$	—		$	719,220	$	(2,365	)	$	719,220		$	(2,365	)
	GSE RMBS		325,911		(1,562		)	91,784		(443		)	417,695			(2,005		)
	Private-label RMBS		4,477		(7		)	45,271		(1,088		)	49,748			(1,095		)
	Manufactured housing loan ABS		—		—			10,377		(1,241		)	10,377			(1,241		)
	Home equity loan ABS		—		—			1,621		(160		)	1,621			(160		)
	Total RMBS and ABS		330,388		(1,569		)	868,273		(5,297		)	1,198,661			(6,866		)
	Total impaired HTM securities		$	330,388	$	(1,569	)	$	868,273	$	(5,297	)	$	1,198,661		$	(6,866	)
	December 31, 2013
	RMBS and ABS:
	Other U.S. obligations - guaranteed RMBS		$	1,094,158	$	(3,365	)	$	546,459	$	(4,041	)	$	1,640,617		$	(7,406	)
	GSE RMBS		1,338,255		(6,542		)	6,766		(12		)	1,345,021			(6,554		)
	Private-label RMBS		61,059		(561		)	58,363		(2,102		)	119,422			(2,663		)
	Manufactured housing loan ABS		—		—			11,343		(1,590		)	11,343			(1,590		)
	Home equity loan ABS		—		—			1,833		(287		)	1,833			(287		)
	Total RMBS and ABS		2,493,472		(10,468		)	624,764		(8,032		)	3,118,236			(18,500		)
	Total impaired HTM securities		$	2,493,472	$	(10,468	)	$	624,764	$	(8,032	)	$	3,118,236		$	(18,500	)
	(1)	For home equity loan ABS, total unrealized losses does not agree to total gross unrecognized holding losses. Total unrealized losses include non-credit-related OTTI losses recorded in AOCI and gross unrecognized holding gains on previously OTTI securities.
HTM Securities by Contractual Maturity	'
	The amortized cost, carrying value and estimated fair value of non-MBS HTM securities by contractual maturity are presented below. MBS and ABS are not presented by contractual maturity because their actual maturities will likely differ from contractual maturities as certain borrowers have the right to prepay their obligations with or without prepayment fees.
			September 30, 2014							December 31, 2013
			Amortized		Carrying			Estimated		Amortized			Carrying			Estimated
	Year of Contractual Maturity		Cost (1)		Value (2)			Fair Value		Cost (1)			Value (2)			Fair Value
	Non-MBS:
	Due in one year or less		$	168,999	$	168,999		$	169,133	$	—		$	—		$	—
	Due after one year through five years		100,000		100,000			100,123		268,998			268,998			269,397
	Total Non-MBS		268,999		268,999			269,256		268,998			268,998			269,397
	Total RMBS and ABS		6,803,583		6,803,396			6,921,144		6,877,493			6,877,252			6,974,921
	Total HTM securities		$	7,072,582	$	7,072,395		$	7,190,400	$	7,146,491		$	7,146,250		$	7,244,318
	(1)	Includes adjustments made to the cost basis of an investment for accretion, amortization, collection of principal, and, if applicable, OTTI recognized in earnings (credit losses).
	(2)	Represents amortized cost after adjustment for non-credit OTTI recognized in AOCI.

OtherThanTemporary_Impairment_

Other-Than-Temporary Impairment (Tables)	9 Months Ended
	Sep. 30, 2014
Other Than Temporary Impairments Analysis [Abstract]	'
Schedule of Significant Inputs In Measuring Other Than Temporary Impairments Recognized In Earnings	'
	The following table presents the other significant modeling assumptions used to determine the amount of credit loss recognized in earnings for the one security that was determined to be OTTI during the three months ended September 30, 2014. The related current credit enhancement is also presented. Credit enhancement is defined as the percentage of subordinated tranches, excess spread, and over-collateralization, if any, in a security structure that will generally absorb losses before we will experience a loss on the security. A credit enhancement percentage of zero reflects a security that has no remaining credit support and is likely to have experienced an actual principal loss. The calculated averages represent the dollar-weighted averages of the private-label RMBS in each category shown. The classification (prime, Alt-A or subprime) is based on the model used to estimate the cash flows for the security, which may not be the same as the classification by the rating agency at the time of origination.
			Significant Modeling Assumptions
			for OTTI private-label RMBS
			for the three months ended September 30, 2014
	Year of Securitization		Prepayment Rates (1)			Default Rates (1)			Loss Severities (1)			Current Credit
												Enhancement (1)
	Prime - 2006		15.5	%		16.6	%		40.3	%		0	%
	(1)	Weighted Average based on UPB.
Rollforward of the Amounts Related to Credit Losses Recognized into Earnings	'
	The following table presents a rollforward of the amounts related to credit losses recognized in earnings. The rollforward excludes accretion of credit losses for securities that have not experienced a significant increase in cash flows.
			Three Months Ended								Nine Months Ended
			September 30,								September 30,
	Credit Loss Rollforward		2014				2013				2014			2013
	Balance at beginning of period		$	71,584			$	72,287			$	72,287		$	109,169
	Additions:
	Additional credit losses for which OTTI was previously recognized (1)		42				—				270			1,924
	Reductions:
	Credit losses on securities sold, matured, paid down or prepaid		—				—				—			(30,506		)
	Unamortized life-to-date credit losses on security that we intend to sell before recovery of its amortized cost basis		—				—				—			(8,300		)
	Significant increases in cash flows expected to be collected, recognized over the remaining life of the securities (2)		(938		)		—				(1,869		)	—
	Balance at end of period		$	70,688			$	72,287			$	70,688		$	72,287
	(1)	For the three months ended September 30, 2014 and 2013, relates to all securities that were impaired prior to July 1, 2014 and 2013, respectively. For the nine months ended September 30, 2014 and 2013, relates to all securities that were impaired prior to January 1, 2014 and 2013, respectively.
	(2)	Represents amounts to be accreted as interest income over the remaining life of the applicable securities.
Total Securities Other-than-Temporarily Impaired during the Life of the Security	'
	The following table presents the classification and balances at September 30, 2014 of OTTI securities impaired prior to that date (i.e., life-to-date) but not necessarily as of that date. Securities are classified based on the originator's classification at the time of origination or based on the classification by the NRSROs upon issuance. Because there is no universally accepted definition of prime, Alt-A or subprime underwriting standards, such classifications are subjective.
			September 30, 2014
			HTM Securities														AFS Securities
	OTTI Life-to-Date		UPB				Amortized Cost				Carrying Value			Estimated Fair Value			UPB		Amortized Cost		Estimated Fair Value
	Private-label RMBS - prime		$	—			$	—			$	—		$	—		$	443,803	$	379,426	$	418,847
	Home equity loan ABS - subprime		737				705				518			630			—		—		—
	Total		$	737			$	705			$	518		$	630		$	443,803	$	379,426	$	418,847

Advances_Tables

Advances (Tables)	9 Months Ended
	Sep. 30, 2014
Advances [Abstract]	'
Summary of Advances Redemption Terms	'
	We had Advances outstanding, as presented below by year of contractual maturity, with interest rates ranging from 0% to 8.34%.
		September 30, 2014					December 31, 2013
	Year of Contractual Maturity	Amount			WAIR %		Amount				WAIR %
	Overdrawn demand and overnight deposit accounts	$	959		2.43		$	1,092			2.5
	Due in 1 year or less	6,194,403			0.64		5,952,161				0.58
	Due after 1 year through 2 years	2,640,043			1.9		1,695,355				2.61
	Due after 2 years through 3 years	2,383,572			1.74		2,289,954				1.59
	Due after 3 years through 4 years	2,105,242			2.18		2,190,551				1.86
	Due after 4 years through 5 years	1,019,474			1.94		1,803,488				2.17
	Thereafter	4,832,053			1.43		3,199,181				1.93
	Total Advances, par value	19,175,746			1.39		17,131,782				1.5
	Fair-value hedging adjustments	126,822					181,211
	Unamortized swap termination fees associated with modified Advances, net of deferred prepayment fees	22,134					24,425
	Total Advances	$	19,324,702				$	17,337,418
Recognized Prepayment/Swap Termination Fees	'
	The following table presents Advance prepayment fees and the associated swap termination fees recognized in Interest Income at the time of the prepayments:
		Three Months Ended September 30,						Nine Months Ended September 30,
	Recognized prepayment/termination fees	2014			2013			2014				2013
	Prepayment fees on Advances	$	593		$	273		$	2,010			$	30,807
	Associated swap termination fees	24			—			(332		)		(22,680		)
	Prepayment Fees on Advances, net	$	617		$	273		$	1,678			$	8,127
Deferred Prepayment/Swap Termination Fees	'
	The following table presents deferred Advance prepayment fees and deferred swap termination fees associated with those Advance prepayments:
		Three Months Ended September 30,						Nine Months Ended September 30,
	Deferred prepayment/termination fees	2014			2013			2014				2013
	Deferred prepayment fees on Advances	$	477		$	197		$	477			$	12,132
	Deferred associated swap termination fees	(475		)	—			(475		)		(7,415		)
	Deferred prepayment fees on Advances, net	$	2		$	197		$	2			$	4,717
Advances by Year of Contractual Maturity, Next Call Date, or Next Put or Convert Date	'
	The following table presents Advances by the earlier of the year of contractual maturity or the next call date and next put date:
		Year of Contractual Maturity						Year of Contractual Maturity
		or Next Call Date						or Next Put Date
		September 30,			December 31,			September 30,				December 31,
		2014			2013			2014				2013
	Overdrawn demand and overnight deposit accounts	$	959		$	1,092		$	959			$	1,092
	Due in 1 year or less	10,031,518			8,312,526			6,370,903				6,128,161
	Due after 1 year through 2 years	2,804,043			1,572,105			2,611,043				1,683,855
	Due after 2 years through 3 years	2,150,822			2,293,954			2,301,072				2,259,954
	Due after 3 years through 4 years	1,905,242			2,052,801			2,055,242				2,091,051
	Due after 4 years through 5 years	954,474			1,653,488			1,004,474				1,768,488
	Thereafter	1,328,688			1,245,816			4,832,053				3,199,181
	Total Advances, par value	$	19,175,746		$	17,131,782		$	19,175,746			$	17,131,782

Mortgage_Loans_Held_for_Portfo1

Mortgage Loans Held for Portfolio (Tables)	9 Months Ended
	Sep. 30, 2014
Mortgage Loans on Real Estate [Abstract]	'
Mortgage Loans Held for Portfolio by Term	'
	The following tables present information on Mortgage Loans Held for Portfolio:
			September 30, 2014
	Term		MPP			MPF			Total
	Fixed-rate long-term mortgages		$	4,865,767		$	440,964		$	5,306,731
	Fixed-rate medium-term (1) mortgages		960,647			81,754			1,042,401
	Total Mortgage Loans Held for Portfolio, UPB		5,826,414			522,718			6,349,132
	Unamortized premiums		120,107			9,514			129,621
	Unamortized discounts		(8,654		)	—			(8,654		)
	Fair-value hedging adjustments		5,144			(529		)	4,615
	Allowance for loan losses		(2,750		)	(250		)	(3,000		)
	Total Mortgage Loans Held for Portfolio, net		$	5,940,261		$	531,453		$	6,471,714
			December 31, 2013
	Term		MPP			MPF			Total
	Fixed-rate long-term mortgages		$	4,528,804		$	457,128		$	4,985,932
	Fixed-rate medium-term (1) mortgages		1,012,587			86,914			1,099,501
	Total Mortgage Loans Held for Portfolio, UPB		5,541,391			544,042			6,085,433
	Unamortized premiums		106,346			10,917			117,263
	Unamortized discounts		(11,942		)	(288		)	(12,230		)
	Fair-value hedging adjustments		4,374			(536		)	3,838
	Allowance for loan losses		(4,000		)	(500		)	(4,500		)
	Total Mortgage Loans Held for Portfolio, net		$	5,636,169		$	553,635		$	6,189,804
	(1)	Defined as a term of 15 years or less at origination.
Mortgage Loans Held for Portfolio by Collateral/Guarantee Type	'
			September 30, 2014
	Type		MPP			MPF			Total
	Conventional		$	5,168,497		$	418,501		$	5,586,998
	Government		657,917			104,217			762,134
	Total Mortgage Loans Held for Portfolio, UPB		$	5,826,414		$	522,718		$	6,349,132
			December 31, 2013
	Type		MPP			MPF			Total
	Conventional		$	4,804,298		$	435,996		$	5,240,294
	Government		737,093			108,046			845,139
	Total Mortgage Loans Held for Portfolio, UPB		$	5,541,391		$	544,042		$	6,085,433

Allowance_for_Credit_Losses_Ta

Allowance for Credit Losses (Tables)	9 Months Ended
	Sep. 30, 2014
Allowance for Credit Losses [Abstract]	'
Impact of MPP Risk Sharing Structure on Allowance for Credit Losses	'
	The following table presents the impact of credit enhancements on the allowance for MPP loan losses:
	MPP Credit Waterfall		September 30,			December 31,
			2014			2013
	Estimated losses remaining after borrower's equity, before credit enhancements		$	21,873		$	31,523
	Portion of estimated losses recoverable from PMI		(3,273		)	(4,922		)
	Portion of estimated losses recoverable from LRA		(4,000		)	(5,072		)
	Portion of estimated losses recoverable from SMI		(12,049		)	(18,740		)
	Allowance for unrecoverable PMI/SMI		199			1,211
	Allowance for MPP loan losses		$	2,750		$	4,000
Changes in Lender Risk Account	'
	The following table presents the activity in the LRA:
			Three Months Ended September 30,						Nine Months Ended September 30,
	LRA Activity		2014			2013			2014			2013
	Balance of LRA, beginning of period		$	49,918		$	40,091		$	45,330		$	33,693
	Additions		5,807			3,856			11,917			12,555
	Claims paid		(411		)	(662		)	(1,664		)	(2,422		)
	Distributions		(93		)	(220		)	(362		)	(761		)
	Balance of LRA, end of period		$	55,221		$	43,065		$	55,221		$	43,065
Rollforward of Allowance for Credit Losses on Mortgage Loans	'
	The tables below present a rollforward of our allowance for loan losses, the allowance for loan losses by impairment methodology, and the recorded investment in conventional mortgage loans by impairment methodology.
			Conventional
	Rollforward of Allowance		MPP			MPF			Total
	Allowance for loan losses, June 30, 2014		$	3,000		$	250		$	3,250
	Charge-offs, net of recoveries		(124		)	—			(124		)
	Provision for (reversal of) loan losses		(126		)	—			(126		)
	Allowance for loan losses, September 30, 2014		$	2,750		$	250		$	3,000
	Allowance for loan losses, June 30, 2013		$	5,000		$	500		$	5,500
	Charge-offs, net of recoveries		(314		)	—			(314		)
	Provision for (reversal of) loan losses		314			—			314
	Allowance for loan losses, September 30, 2013		$	5,000		$	500		$	5,500
	Allowance for loan losses, December 31, 2013		$	4,000		$	500		$	4,500
	Charge-offs, net of recoveries		(575		)	(9		)	(584		)
	Provision for (reversal of) loan losses		(675		)	(241		)	(916		)
	Allowance for loan losses, September 30, 2014		$	2,750		$	250		$	3,000
	Allowance for loan losses, December 31, 2012		$	9,850		$	150		$	10,000
	Charge-offs, net of recoveries		(1,049		)	—			(1,049		)
	Provision for (reversal of) loan losses		(3,801		)	350			(3,451		)
	Allowance for loan losses, September 30, 2013		$	5,000		$	500		$	5,500
Allowance for Credit Losses and Recorded Investment by Impairment Methodology	'
			Conventional
	Allowance for Loan Losses, September 30, 2014		MPP			MPF			Total
	Loans collectively evaluated for impairment		$	2,292		$	250		$	2,542
	Loans individually evaluated for impairment (1)		458			—			458
	Total allowance for loan losses		$	2,750		$	250		$	3,000
	Allowance for Loan Losses, December 31, 2013
	Loans collectively evaluated for impairment		$	3,065		$	500		$	3,565
	Loans individually evaluated for impairment (1)		935			—			935
	Total allowance for loan losses		$	4,000		$	500		$	4,500
	Recorded Investment, September 30, 2014
	Loans collectively evaluated for impairment		$	5,270,562		$	428,405		$	5,698,967
	Loans individually evaluated for impairment (1)		19,137			—			19,137
	Total recorded investment		$	5,289,699		$	428,405		$	5,718,104
	Recorded Investment, December 31, 2013
	Loans collectively evaluated for impairment		$	4,883,419		$	446,796		$	5,330,215
	Loans individually evaluated for impairment (1)		18,355			—			18,355
	Total recorded investment		$	4,901,774		$	446,796		$	5,348,570
	(1)	The recorded investment in our MPP conventional loans individually evaluated for impairment excludes principal that was previously paid in full by the servicers as of September 30, 2014 and December 31, 2013 of $8,100 and $13,976, respectively, that remains subject to potential claims by those servicers for any losses resulting from past or future liquidations of the underlying properties. However, the MPP conventional loan allowance for loan losses includes $417 and $895 for these potential claims as of September 30, 2014 and December 31, 2013, respectively.
Recorded Investment in Delinquent Mortgage Loans	'
	The tables below present our key credit quality indicators for mortgage loans held for portfolio:
	Mortgage Loans Held for Portfolio as of September 30, 2014		MPP						MPF
			Conventional			FHA			Conventional			Government			Total
	Past due 30-59 days		$	52,697		$	26,125		$	925		$	2,110		$	81,857
	Past due 60-89 days		15,006			5,813			1			358			21,178
	Past due 90 days or more		54,080			2,070			1			355			56,506
	Total past due		121,783			34,008			927			2,823			159,541
	Total current		5,167,916			642,865			427,478			103,053			6,341,312
	Total mortgage loans, recorded investment		5,289,699			676,873			428,405			105,876			6,500,853
	Net unamortized premiums		(95,588		)	(15,865		)	(8,245		)	(1,269		)	(120,967		)
	Fair-value hedging adjustments		(4,517		)	(628		)	479			51			(4,615		)
	Accrued interest receivable		(21,097		)	(2,463		)	(2,138		)	(441		)	(26,139		)
	Total Mortgage Loans Held for Portfolio, UPB		$	5,168,497		$	657,917		$	418,501		$	104,217		$	6,349,132
	Other Delinquency Statistics as of September 30, 2014
	In process of foreclosure (1)		$	38,315		$	—		$	—		$	—		$	38,315
	Serious delinquency rate (2)		1.02		%	0.31		%	—		%	0.34		%	0.87		%
	Past due 90 days or more still accruing interest (3)		$	52,231		$	2,070		$	—		$	355		$	54,656
	On non-accrual status		2,388			—			1			—			2,389
	Mortgage Loans Held for Portfolio as of December 31, 2013		MPP						MPF
			Conventional			FHA			Conventional			Government			Total
	Past due 30-59 days		$	55,615		$	38,963		$	179		$	382		$	95,139
	Past due 60-89 days		18,203			7,438			1			555			26,197
	Past due 90 days or more		76,611			4,234			130			—			80,975
	Total past due		150,429			50,635			310			937			202,311
	Total current		4,751,345			709,032			446,486			109,010			6,015,873
	Total mortgage loans, recorded investment		4,901,774			759,667			446,796			109,947			6,218,184
	Net unamortized premiums		(75,381		)	(19,023		)	(9,126		)	(1,503		)	(105,033		)
	Fair-value hedging adjustments		(3,593		)	(781		)	488			48			(3,838		)
	Accrued interest receivable		(18,502		)	(2,770		)	(2,162		)	(446		)	(23,880		)
	Total Mortgage Loans Held for Portfolio, UPB		$	4,804,298		$	737,093		$	435,996		$	108,046		$	6,085,433
	Other Delinquency Statistics as of December 31, 2013
	In process of foreclosure (1)		$	47,970		$	—		$	—		$	—		$	47,970
	Serious delinquency rate (2)		1.56		%	0.56		%	0.03		%	—		%	1.3		%
	Past due 90 days or more still accruing interest (3)		$	76,099		$	4,234		$	—		$	—		$	80,333
	On non-accrual status		1,174			—			130			—			1,304
	(1)	Includes loans for which the decision of foreclosure or similar alternative, such as pursuit of deed-in-lieu of foreclosure, has been reported. Loans in process of foreclosure are included in past due categories depending on their delinquency status.
	(2)	Represents loans 90 days or more past due (including loans in process of foreclosure) expressed as a percentage of the total recorded investment in mortgage loans. The percentage excludes principal amounts that were previously paid in full by the servicers on conventional loans that are pending resolution of potential loss claims. Many FHA loans are repurchased by the servicers when they reach 90 days or more delinquent status, similar to the rules for servicers of Ginnie Mae MBS, resulting in the lower serious delinquency rate for FHA loans.
	(3)	Although our past due scheduled/scheduled MPP loans are classified as loans past due 90 days or more based on the mortgagor's payment status, we do not consider these loans to be non-accrual.
Performing and Non-performing Troubled Debt Restructurings	'
	The table below presents the recorded investment of the performing and non-performing TDRs. Non-performing represents loans on non-accrual status only.
			September 30, 2014									December 31, 2013
	Recorded Investment		Performing			Non-Performing			Total			Performing			Non-Performing			Total
	MPP conventional loans		$	18,414		$	723		$	19,137		$	17,407		$	948		$	18,355
Troubled Debt Restructurings Recorded Investment Balance at Modification Date	'
	The tables below present the pre- and post-modification amounts, which represent the amount of recorded investment as of the date the loans were modified.
	Troubled Debt Restructurings at Modification Date		Three Months Ended September 30, 2014						Three Months Ended September 30, 2013
			Pre-Modification			Post-Modification			Pre-Modification			Post-Modification
	MPP conventional loans		$	—		$	—		$	767		$	802
	Troubled Debt Restructurings at Modification Date		Nine Months Ended September 30, 2014						Nine Months Ended September 30, 2013
			Pre-Modification			Post-Modification			Pre-Modification			Post-Modification
	MPP conventional loans		$	2,439		$	2,593		$	4,060		$	4,306
Individually Evaluated Impaired Loan Statistics by Product Class Level	'
	The first table presents the recorded investment, UPB and related allowance associated with these loans, while the next tables present the average recorded investment of individually impaired loans and related interest income recognized.
			September 30, 2014									December 31, 2013
	Individually Evaluated Impaired Loans		Recorded Investment			UPB			Related Allowance for Loan Losses			Recorded Investment			UPB			Related Allowance for Loan Losses
	MPP conventional loans without allowance for loan losses (1)		$	18,414		$	18,248		$	—		$	17,407		$	17,239		$	—
	MPP conventional loans with allowance for loan losses		723			710			41			948			928			40
	Total		$	19,137		$	18,958		$	41		$	18,355		$	18,167		$	40
	(1)	No allowance for loan losses was recorded on these impaired loans after consideration of the underlying loan-specific attribute data, estimated liquidation value of real estate collateral held, estimated costs associated with maintaining and disposing of the collateral, and credit enhancements.
Impaired Financing Receivables	'
			Three Months Ended						Three Months Ended
			September 30, 2014						September 30, 2013
	Individually Evaluated Impaired Loans		Average Recorded Investment			Interest Income Recognized			Average Recorded Investment			Interest Income Recognized
	MPP conventional loans without allowance for loan losses		$	18,843		$	267		$	17,447		$	253
	MPP conventional loans with allowance for loan losses		725			10			1,143			17
	Total		$	19,568		$	277		$	18,590		$	270
			Nine Months Ended						Nine Months Ended
			September 30, 2014						September 30, 2013
	Individually Evaluated Impaired Loans		Average Recorded Investment			Interest Income Recognized			Average Recorded Investment			Interest Income Recognized
	MPP conventional loans without allowance for loan losses		$	18,389		$	798		$	16,396		$	708
	MPP conventional loans with allowance for loan losses		728			40			1,142			82
	Total		$	19,117		$	838		$	17,538		$	790

Derivative_and_Hedging_Activit1

Derivative and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Fair Value of Derivative Instruments	'
	The following table presents the notional amount and estimated fair value of derivative instruments, including the effect of netting adjustments, cash collateral, and the related accrued interest.
			Notional			Estimated Fair Value			Estimated Fair Value
			Amount of			of Derivative			of Derivative
	September 30, 2014		Derivatives			Assets			Liabilities
	Derivatives designated as hedging instruments:
	Interest-rate swaps		$	28,823,647		$	87,484		$	375,642
	Total derivatives designated as hedging instruments		28,823,647			87,484			375,642
	Derivatives not designated as hedging instruments:
	Interest-rate swaps		1,454,721			470			1,561
	Interest-rate caps/floors		340,500			295			—
	Interest-rate forwards		159,700			76			46
	MDCs		159,004			250			40
	Total derivatives not designated as hedging instruments		2,113,925			1,091			1,647
	Total derivatives before adjustments		$	30,937,572		88,575			377,289
	Netting adjustments					(81,449		)	(81,449		)
	Cash collateral and related accrued interest					11,863			(203,831		)
	Total adjustments (1)					(69,586		)	(285,280		)
	Total derivatives, net					$	18,989		$	92,009
	December 31, 2013
	Derivatives designated as hedging instruments:
	Interest-rate swaps		$	26,758,882		$	125,431		$	540,995
	Total derivatives designated as hedging instruments		26,758,882			125,431			540,995
	Derivatives not designated as hedging instruments:
	Interest-rate swaps		2,344,743			823			5,706
	Interest-rate caps/floors		340,500			1,327			—
	Interest-rate forwards		61,300			233			11
	MDCs		58,797			12			246
	Total derivatives not designated as hedging instruments		2,805,340			2,395			5,963
	Total derivatives before adjustments		$	29,564,222		127,826			546,958
	Netting adjustments					(119,488		)	(119,488		)
	Cash collateral and related accrued interest					(1,124		)	(317,726		)
	Total adjustments (1)					(120,612		)	(437,214		)
	Total derivatives, net					$	7,214		$	109,744
	(1)	Represents the application of the netting requirements that allow us to settle (i) positive and negative positions and (ii) cash collateral and related accrued interest held or placed, with the same clearing agent and/or counterparty.
Offsetting of Derivative Assets and Derivative Liabilities	'
	The following table presents separately the estimated fair value of derivative instruments meeting or not meeting netting requirements, including the related collateral received from or pledged to counterparties.
			September 30, 2014						December 31, 2013
			Derivative Assets			Derivative Liabilities			Derivative Assets			Derivative Liabilities
	Derivative instruments meeting netting requirements:
	Gross recognized amount
	Bilateral derivatives		$	81,997		$	361,157		$	122,411		$	544,014
	Cleared derivatives		6,252			16,046			5,170			2,687
	Total gross recognized amount		88,249			377,203			127,581			546,701
	Gross amounts of netting adjustments, cash collateral and related accrued interest
	Bilateral derivatives		(81,449		)	(269,234		)	(121,425		)	(434,527		)
	Cleared derivatives		11,863			(16,046		)	813			(2,687		)
	Total gross amounts of netting adjustments, cash collateral and related accrued interest		(69,586		)	(285,280		)	(120,612		)	(437,214		)
	Net amounts after netting adjustments, cash collateral and related accrued interest
	Bilateral derivatives		548			91,923			986			109,487
	Cleared derivatives		18,115			—			5,983			—
	Total net amounts after netting adjustments, cash collateral and related accrued interest		18,663			91,923			6,969			109,487
	Derivative instruments not meeting netting requirements (1)		326			86			245			257
	Total derivatives, at estimated fair value		$	18,989		$	92,009		$	7,214		$	109,744
	(1)	Includes MDCs and certain interest-rate forwards.
Components of Net Gains (Losses) on Derivatives and Hedging Activities	'
	The following table presents the components of Net Gains (Losses) on Derivatives and Hedging Activities reported in Other Income (Loss):
			Three Months Ended September 30,						Nine Months Ended September 30,
	Type of Hedge		2014			2013			2014			2013
	Net gain (loss) related to fair-value hedge ineffectiveness:
	Interest-rate swaps		$	233		$	(1,353	)	$	(3,286	)	$	8,596
	Total net gain (loss) related to fair-value hedge ineffectiveness		233			(1,353		)	(3,286		)	8,596
	Net gain (loss) on derivatives not designated as hedging instruments:
	Interest-rate swaps		(1,868		)	62			3,903			5,002
	Interest-rate caps/floors		(158		)	(405		)	(1,033		)	189
	Interest-rate forwards		(365		)	334			(3,790		)	6,119
	Net interest settlements		2,955			194			8,395			(4,063		)
	MDCs		(120		)	1,043			2,594			(5,172		)
	Total net gain (loss) on derivatives not designated as hedging instruments		444			1,228			10,069			2,075
	Net Gains (Losses) on Derivatives and Hedging Activities		$	677		$	(125	)	$	6,783		$	10,671
Effect of Fair Value Hedge-Related Derivative Instruments	'
	The following table presents, by type of hedged item, the gains (losses) on derivatives and the related hedged items in fair-value hedging relationships and the effect of those derivatives on Net Interest Income:
			Gain (Loss)			Gain (Loss)			Net Fair-				Effect on
			on			on Hedged			Value Hedge				Net Interest
	Three Months Ended September 30, 2014		Derivative			Item			Ineffectiveness				Income (1)
	Advances		$	45,658		$	(45,938	)	$	(280	)		$	(38,558	)
	AFS securities		29,428			(29,991		)	(563		)		(24,487		)
	CO Bonds		(13,614		)	14,690			1,076				16,447
	Total		$	61,472		$	(61,239	)	$	233			$	(46,598	)
	Three Months Ended September 30, 2013
	Advances		$	(8,893	)	$	7,160		$	(1,733	)		$	(50,794	)
	AFS securities		3,694			(3,524		)	170				(24,196		)
	CO Bonds		15,723			(15,513		)	210				21,350
	Total		$	10,524		$	(11,877	)	$	(1,353	)		$	(53,640	)
	Nine Months Ended September 30, 2014
	Advances		$	24,525		$	(24,358	)	$	167			$	(111,842	)
	AFS securities		21,569			(22,010		)	(441		)		(73,508		)
	CO Bonds		40,374			(43,386		)	(3,012		)		54,634
	Total		$	86,468		$	(89,754	)	$	(3,286	)		$	(130,716	)
	Nine Months Ended September 30, 2013
	Advances		$	197,316		$	(194,821	)	$	2,495			$	(154,036	)
	AFS securities		124,730			(122,879		)	1,851				(72,335		)
	CO Bonds		(97,336		)	101,586			4,250				64,681
	Total		$	224,710		$	(216,114	)	$	8,596			$	(161,690	)
	(1)	Includes the effect of derivatives in fair-value hedging relationships on Net Interest Income that is recorded in the Interest Income / Expense line item of the respective hedged items. Excludes the Interest Income / Expense of the respective hedged items, which fully offset the Interest Income / Expense of the derivatives, except to the extent of any hedge ineffectiveness. Net interest settlements on derivatives that are not in fair-value hedging relationships are reported in Other Income (Loss).

Consolidated_Obligations_Table

Consolidated Obligations (Tables)	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Discount Notes	'
	Our participation in Discount Notes, all of which are due within one year of issuance, was as follows:
	Discount Notes	September 30,			December 31,
		2014			2013
	Book value	$	10,105,640		$	7,434,890
	Par value	10,107,866			7,435,940
	Weighted average effective interest rate	0.1		%	0.12		%
CO Bonds by Year of Contractual Maturity	'
	The following table presents our participation in CO Bonds outstanding by contractual maturity:
		September 30, 2014						December 31, 2013
	Year of Contractual Maturity	Amount			WAIR%			Amount			WAIR%
	Due in 1 year or less	$	12,548,950		0.4			$	12,459,650		0.43
	Due after 1 year through 2 years	2,390,500			1.18			1,940,550			1.27
	Due after 2 years through 3 years	2,061,850			1.3			1,359,400			1.93
	Due after 3 years through 4 years	2,208,500			1.93			1,539,200			2.08
	Due after 4 years through 5 years	1,014,300			2.44			1,690,100			1.56
	Thereafter	6,710,000			3.04			7,654,200			2.92
	Total CO Bonds, par value	26,934,100			1.4			26,643,100			1.45
	Unamortized premiums	26,589						32,455
	Unamortized discounts	(15,468		)				(16,031		)
	Fair-value hedging adjustments	(31,126		)				(75,599		)
	Total CO Bonds	$	26,914,095					$	26,583,925
CO Bonds by Redemption Feature	'
	The following tables present our participation in CO Bonds outstanding by redemption feature and contractual maturity or next call date:
	Redemption Feature	September 30,			December 31,
		2014			2013
	Non-callable / non-putable	$	18,922,100		$	17,677,100
	Callable	8,012,000			8,966,000
	Total CO Bonds, par value	$	26,934,100		$	26,643,100
CO Bonds by Contractual Maturity or Next Call Date	'
	Year of Contractual Maturity or Next Call Date	September 30,			December 31,
		2014			2013
	Due in 1 year or less	$	20,550,950		$	20,900,650
	Due after 1 year through 2 years	2,260,500			1,583,550
	Due after 2 years through 3 years	839,850			954,400
	Due after 3 years through 4 years	667,500			649,200
	Due after 4 years through 5 years	556,300			283,100
	Thereafter	2,059,000			2,272,200
	Total CO Bonds, par value	$	26,934,100		$	26,643,100

Affordable_Housing_Program_Tab

Affordable Housing Program (Tables)	9 Months Ended
	Sep. 30, 2014
Affordable Housing Program [Abstract]	'
Schedule of Activity in Affordable Housing Program Obligation	'
	The following table summarizes the activity in our AHP funding obligation:
			Three Months Ended September 30,						Nine Months Ended September 30,
	AHP Activity		2014			2013			2014			2013
	Balance at beginning of period		$	43,351		$	41,050		$	42,778		$	34,362
	Assessment expense		3,765			3,442			11,270			16,066
	Subsidy usage, net (1)		(5,431		)	(4,718		)	(12,363		)	(10,654		)
	Balance at end of period		$	41,685		$	39,774		$	41,685		$	39,774
	(1)	Subsidies disbursed are reported net of returns/recaptures of previously disbursed subsidies.

Capital_Tables

Capital (Tables)	9 Months Ended
	Sep. 30, 2014
Capital [Abstract]	'
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations	'
	As presented in the following table, we were in compliance with the Finance Agency's capital requirements at September 30, 2014 and December 31, 2013. For regulatory purposes, AOCI is not considered capital; MRCS, however, is considered capital.
		September 30, 2014						December 31, 2013
	Regulatory Capital Requirements	Required			Actual			Required			Actual
	Risk-based capital	$	624,819		$	2,541,804		$	764,917		$	2,378,670
	Regulatory permanent capital-to-asset ratio	4		%	6.19		%	4		%	6.3		%
	Regulatory permanent capital	$	1,641,526		$	2,541,804		$	1,511,448		$	2,378,670
	Leverage ratio	5		%	9.29		%	5		%	9.44		%
	Leverage capital	$	2,051,908		$	3,812,706		$	1,889,310		$	3,568,005
MRCS Activity	'
	The following table presents the activity in MRCS:
		Three Months Ended September 30,						Nine Months Ended September 30,
	MRCS Activity	2014			2013			2014			2013
	Liability at beginning of period	$	16,785		$	255,720		$	16,787		$	450,716
	Additions due to change in membership status	47			—			47			95,441
	Redemptions/repurchases	(695		)	(401		)	(697		)	(290,975		)
	Accrued dividends	—			—			—			137
	Liability at end of period	$	16,137		$	255,319		$	16,137		$	255,319
Schedule of Distributions on Mandatorily Redeemable Capital Stock	'
	The following table presents the distributions on MRCS:
		Three Months Ended September 30,						Nine Months Ended September 30,
	MRCS Distributions	2014			2013			2014			2013
	Recorded as Interest Expense	$	129		$	2,225		$	874		$	6,713
	Recorded as distributions from Retained Earnings	—			—			—			137
	Total	$	129		$	2,225		$	874		$	6,850

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Abstract]	'
Schedule of Changes in the Components of AOCI	'
	The following table presents a summary of the changes in the components of AOCI for the three and nine months ended September 30, 2014 and 2013:
	AOCI Rollforward	Unrealized Gains (Losses) on AFS Securities (Note 3)			Non-Credit OTTI on AFS Securities (Notes 3 and 5)			Non-Credit OTTI on HTM Securities			Pension Benefits			Total AOCI
								(Notes 4 and 5)
	Balance, June 30, 2013	$	475		$	15,425		$	(275	)	$	(11,698	)	$	3,927
	OCI before reclassifications:
	Net change in unrealized gains (losses)	2,392			2,474			—			—			4,866
	Net change in fair value	—			(84		)	—			—			(84		)
	Accretion of non-credit loss	—			—			18			—			18
	Reclassifications from OCI to Net Income:
	Net realized gains from sale of AFS securities	—			—			—			—			—
	Pension Benefits	—			—			—			6,175			6,175
	Total Other Comprehensive Income	2,392			2,390			18			6,175			10,975
	Balance, September 30, 2013	$	2,867		$	17,815		$	(257	)	$	(5,523	)	$	14,902
	Balance, June 30, 2014	$	12,894		$	38,856		$	(209	)	$	(4,364	)	$	47,177
	OCI before reclassifications:
	Net change in unrealized gains (losses)	9,696			569			—			—			10,265
	Net change in fair value	—			(46		)	—			—			(46		)
	Accretion of non-credit loss	—			—			22			—			22
	Reclassifications from OCI to Net Income:
	Non-credit portion of OTTI losses	—			42			—			—			42
	Pension Benefits	—			—			—			(36		)	(36		)
	Total Other Comprehensive Income	9,696			565			22			(36		)	10,247
	Balance, September 30, 2014	$	22,590		$	39,421		$	(187	)	$	(4,400	)	$	57,424
	AOCI Rollforward	Unrealized Gains (Losses) on AFS Securities (Note 3)			Non-Credit OTTI on AFS Securities (Notes 3 and 5)			Non-Credit OTTI on HTM Securities			Pension Benefits			Total AOCI
								(Notes 4 and 5)
	Balance, December 31, 2012	$	12,335		$	(9,684	)	$	(312	)	$	(12,397	)	$	(10,058	)
	OCI before reclassifications:
	Net change in unrealized gains (losses)	(9,468		)	7,615			—			—			(1,853		)
	Net change in fair value	—			35,095			—			—			35,095
	Accretion of non-credit loss	—			—			55			—			55
	Reclassifications from OCI to Net Income:
	Net realized gains from sale of AFS securities	—			(17,135		)	—			—			(17,135		)
	Non-credit portion of OTTI losses	—			1,924			—			—			1,924
	Pension Benefits	—			—			—			6,874			6,874
	Total Other Comprehensive Income	(9,468		)	27,499			55			6,874			24,960
	Balance, September 30, 2013	$	2,867		$	17,815		$	(257	)	$	(5,523	)	$	14,902
	Balance, December 31, 2013	$	317		$	25,936		$	(241	)	$	(4,292	)	$	21,720
	OCI before reclassifications:
	Net change in unrealized gains (losses)	22,273			13,442			—			—			35,715
	Net change in fair value	—			(227		)	—			—			(227		)
	Accretion of non-credit loss	—			—			54			—			54
	Reclassifications from OCI to Net Income:
	Non-credit portion of OTTI losses	—			270			—			—			270
	Pension Benefits	—			—			—			(108		)	(108		)
	Total Other Comprehensive Income	22,273			13,485			54			(108		)	35,704
	Balance, September 30, 2014	$	22,590		$	39,421		$	(187	)	$	(4,400	)	$	57,424

Segment_Information_Tables

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
Financial Performance by Operating Segment	'
	The following table presents our financial performance by operating segment:
		Three Months Ended September 30, 2014								Three Months Ended September 30, 2013
		Traditional		Mortgage Loans			Total			Traditional			Mortgage Loans			Total
	Net Interest Income	$	30,128	$	17,130		$	47,258		$	34,486		$	17,640		$	52,126
	Provision for (Reversal of) Credit Losses	—		(126		)	(126		)	—			314			314
	Other Income (Loss)	7,266		(446		)	6,820			(856		)	1,407			551
	Other Expenses	14,565		2,122			16,687			18,324			1,841			20,165
	Income Before Assessments	22,829		14,688			37,517			15,306			16,892			32,198
	Affordable Housing Program Assessments	2,296		1,469			3,765			1,753			1,689			3,442
	Net Income	$	20,533	$	13,219		$	33,752		$	13,553		$	15,203		$	28,756
		Nine Months Ended September 30, 2014								Nine Months Ended September 30, 2013
		Traditional		Mortgage Loans			Total			Traditional			Mortgage Loans			Total
	Net Interest Income	$	89,080	$	48,354		$	137,434		$	112,715		$	60,418		$	173,133
	Provision for (Reversal of) Credit Losses	—		(916		)	(916		)	—			(3,451		)	(3,451		)
	Other Income (Loss)	23,732		(1,065		)	22,667			27,359			1,104			28,463
	Other Expenses	42,808		6,386			49,194			46,347			4,751			51,098
	Income Before Assessments	70,004		41,819			111,823			93,727			60,222			153,949
	Affordable Housing Program Assessments	7,088		4,182			11,270			10,044			6,022			16,066
	Net Income	$	62,916	$	37,637		$	100,553		$	83,683		$	54,200		$	137,883
Schedule of Segment Assets by Segment	'
	The following table presents asset balances by operating segment:
	By Date	Traditional		Mortgage Loans			Total
	September 30, 2014	$	34,566,441	$	6,471,714		$	41,038,155
	December 31, 2013	31,596,386		6,189,804			37,786,190

Estimated_Fair_Values_Tables

Estimated Fair Values (Tables)	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value, by Balance Sheet Grouping	'
	The following tables present the carrying value and estimated fair value of each of our financial instruments. The total of the estimated fair values does not represent an estimate of our overall market value as a going concern, which would take into account future business opportunities and the net profitability of assets and liabilities, among other considerations.
			September 30, 2014
						Estimated Fair Value
			Carrying															Netting
	Financial Instruments		Value			Total			Level 1			Level 2			Level 3			Adjustment (1)
	Assets:
	Cash and Due from Banks		$	4,444,619		$	4,444,619		$	4,444,619		$	—		$	—		$	—
	Interest-Bearing Deposits		285			285			—			285			—			—
	AFS Securities		3,574,036			3,574,036			—			3,155,189			418,847			—
	HTM Securities		7,072,395			7,190,400			—			7,067,563			122,837			—
	Advances		19,324,702			19,384,314			—			19,384,314			—			—
	Mortgage Loans Held for Portfolio, net		6,471,714			6,678,052			—			6,632,312			45,740			—
	Accrued Interest Receivable		79,329			79,329			—			79,329			—			—
	Derivative Assets, net		18,989			18,989			—			88,575			—			(69,586		)
	Grantor Trust Assets (included in Other Assets)		12,906			12,906			12,906			—			—			—
	Liabilities:
	Deposits		1,020,313			1,020,313			—			1,020,313			—			—
	Consolidated Obligations:
	Discount Notes		10,105,640			10,107,866			—			10,107,866			—			—
	CO Bonds		26,914,095			27,163,745			—			27,163,745			—			—
	Accrued Interest Payable		82,089			82,089			—			82,089			—			—
	Derivative Liabilities, net		92,009			92,009			—			377,289			—			(285,280		)
	MRCS		16,137			16,137			16,137			—			—			—
			December 31, 2013
						Estimated Fair Value
			Carrying															Netting
	Financial Instruments		Value			Total			Level 1			Level 2			Level 3			Adjustment (1)
	Assets:
	Cash and Due from Banks		$	3,318,564		$	3,318,564		$	3,318,564		$	—		$	—		$	—
	Interest-Bearing Deposits		485			485			—			485			—			—
	AFS Securities		3,632,835			3,632,835			—			3,163,150			469,685			—
	HTM Securities		7,146,250			7,244,318			—			7,083,333			160,985			—
	Advances		17,337,418			17,428,710			—			17,428,710			—			—
	Mortgage Loans Held for Portfolio, net		6,189,804			6,272,905			—			6,228,216			44,689			—
	Accrued Interest Receivable		79,072			79,072			—			79,072			—			—
	Derivative Assets, net		7,214			7,214			—			127,826			—			(120,612		)
	Grantor Trust Assets (included in Other Assets)		12,483			12,483			12,483			—			—			—
	Liabilities:
	Deposits		1,066,632			1,066,632			—			1,066,632			—			—
	Consolidated Obligations:
	Discount Notes		7,434,890			7,435,940			—			7,435,940			—			—
	CO Bonds		26,583,925			26,503,918			—			26,503,918			—			—
	Accrued Interest Payable		80,757			80,757			—			80,757			—			—
	Derivative Liabilities, net		109,744			109,744			—			546,958			—			(437,214		)
	MRCS		16,787			16,787			16,787			—			—			—
	(1)	Represents the application of the netting requirements that allow us to settle (i) positive and negative positions and (ii) cash collateral and related accrued interest held or placed, with the same clearing agent and/or counterparty.
Estimated Fair Value on a Recurring Basis	'
	The following tables present by level within the fair value hierarchy the estimated fair value of our financial assets and liabilities that are recorded at estimated fair value on a recurring or non-recurring basis on our Statement of Condition. We did not have any financial assets or liabilities recorded at estimated fair value on a non-recurring basis on our Statement of Condition as of September 30, 2014 or December 31, 2013.
															Netting
	September 30, 2014		Total			Level 1			Level 2			Level 3			Adjustment (1)
	AFS Securities:
	GSE and TVA debentures		$	3,155,189		$	—		$	3,155,189		$	—		$	—
	Private-label RMBS		418,847			—			—			418,847			—
	Total AFS Securities		3,574,036			—			3,155,189			418,847			—
	Derivative Assets:
	Interest-rate related		18,663			—			88,249			—			(69,586		)
	Interest-rate forwards		76			—			76			—			—
	MDCs		250			—			250			—			—
	Total Derivative Assets, net		18,989			—			88,575			—			(69,586		)
	Grantor Trust Assets (included in Other Assets)		12,906			12,906			—			—			—
	Total recurring assets at estimated fair value		$	3,605,931		$	12,906		$	3,243,764		$	418,847		$	(69,586	)
	Derivative Liabilities:
	Interest-rate related		$	91,923		$	—		$	377,203		$	—		$	(285,280	)
	Interest-rate forwards		46			—			46			—			—
	MDCs		40			—			40			—			—
	Total Derivative Liabilities, net		92,009			—			377,289			—			(285,280		)
	Total recurring liabilities at estimated fair value		$	92,009		$	—		$	377,289		$	—		$	(285,280	)
	December 31, 2013
	AFS Securities:
	GSE and TVA debentures		$	3,163,150		$	—		$	3,163,150		$	—		$	—
	Private-label RMBS		469,685			—			—			469,685			—
	Total AFS Securities		3,632,835			—			3,163,150			469,685			—
	Derivative Assets:
	Interest-rate related		6,969			—			127,581			—			(120,612		)
	Interest-rate forwards		233			—			233			—			—
	MDCs		12			—			12			—			—
	Total Derivative Assets, net		7,214			—			127,826			—			(120,612		)
	Grantor Trust Assets (included in Other Assets)		12,483			12,483			—			—			—
	Total recurring assets at estimated fair value		$	3,652,532		$	12,483		$	3,290,976		$	469,685		$	(120,612	)
	Derivative Liabilities:
	Interest-rate related		$	109,487		$	—		$	546,701		$	—		$	(437,214	)
	Interest-rate forwards		11			—			11			—			—
	MDCs		246			—			246			—			—
	Total Derivative Liabilities, net		109,744			—			546,958			—			(437,214		)
	Total recurring liabilities at estimated fair value		$	109,744		$	—		$	546,958		$	—		$	(437,214	)
	(1)	Represents the application of the netting requirements that allow us to settle positive and negative positions and also cash collateral and related accrued interest held or placed with the same clearing agent and/or counterparty.
Reconciliation of AFS Private-label RMBS Measured at Estimated Fair Value on a Recurring Basis using Level 3 Significant Inputs	'
	The table below presents a rollforward of our AFS private-label RMBS measured at estimated fair value on a recurring basis using Level 3 significant inputs. The estimated fair values for the private-label RMBS were determined using a pricing source, such as a dealer quote or comparable security price, for which the significant unobservable inputs used to determine the price were not reasonably available.
			Three Months Ended September 30,						Nine Months Ended September 30,
	Level 3 Rollforward		2014			2013			2014			2013
	Balance, beginning of period		$	442,712		$	511,952		$	469,685		$	640,142
	Total realized and unrealized gains (losses):
	Accretion of credit losses in Interest Income		872			37			1,746			95
	Net gains (losses) on changes in fair value in Other Income (Loss)		(42		)	—			(270		)	—
	Net change in fair value not in excess of cumulative non-credit losses in OCI		(46		)	(84		)	(227		)	12,625
	Unrealized gains (losses) in OCI		569			2,474			13,442			16,843
	Reclassification of non-credit portion in OCI to Other Income (Loss)		42			—			270			—
	Purchases, issuances, sales and settlements:
	Settlements		(25,260		)	(25,810		)	(65,799		)	(56,957		)
	Transfers out		—			—			—			(124,179		)
	Balance, end of period		$	418,847		$	488,569		$	418,847		$	488,569
	Net gains (losses) included in earnings attributable to changes in fair value relating to assets still held at end of period		$	830		$	37		$	1,476		$	95

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Off-Balance Sheet Commitments	'
	The following table presents our off-balance-sheet commitments at their notional amounts:
			September 30, 2014
	Type of Commitment		Expire within one year		Expire after one year		Total
	Letters of credit outstanding		$	104,450	$	150,703	$	255,153
	Unused lines of credit		822,299		—		822,299
	Commitments to fund additional Advances (1)		20,000		—		20,000
	Commitments to fund or purchase mortgage loans		159,004		—		159,004
	Unsettled CO Bonds, at par (2)		452,750		—		452,750
	(1)	Generally for periods up to six months.
	(2)	Includes $405,000 hedged with associated interest-rate swaps.

Transactions_with_Related_Part1

Transactions with Related Parties (Tables)	9 Months Ended
	Sep. 30, 2014
Related Parties Holding 10% or more of our Capital Stock and MRCS [Member]	'
Related Party Transaction [Line Items]	'
Outstanding Balances with Respect to Transactions with Related Parties	'
	The following table presents the outstanding balances with respect to transactions with related parties and their balances as a percent of the total balance on our Statement of Condition.
			Capital Stock and MRCS					Advances							Mortgage Loans Held for Portfolio (1)
	September 30, 2014		Balance,			% of Total		Balance,				% of Total			UPB		% of Total
			par value					par value
	Flagstar Bank, FSB		$	209,737		12	%	$	150,000			1	%		$	471,029	7	%
	Total		$	209,737		12	%	$	150,000			1	%		$	471,029	7	%
	December 31, 2013
	Flagstar Bank, FSB		$	209,737		13	%	$	988,000			6	%		$	537,426	9	%
	Total		$	209,737		13	%	$	988,000			6	%		$	537,426	9	%
	(1)	Represents UPB of mortgage loans purchased from related party.
Net Advances to (Repayments from) Related Parties	'
	We had net Advances to (repayments from) related parties as follows:
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
	Related Party		2014			2013			2014				2013
	Flagstar Bank, FSB		$	(881,705	)	$	7,598		$	(838,000	)		$	(272,402	)
Directors' Financial Institutions [Member]	'
Related Party Transaction [Line Items]	'
Outstanding Balances with Respect to Transactions with Related Parties	'
	Transactions with Directors' Financial Institutions. The following table presents the outstanding balances with respect to transactions with directors' financial institutions and their balance as a percent of the total balance on our Statement of Condition.
			Capital Stock and MRCS					Advances							Mortgage Loans Held for Portfolio (1)
	Date		Balance,			% of Total		Balance,				% of Total			UPB		% of Total
			par value					par value
	September 30, 2014		$	51,838		3	%	$	269,336			1	%		$	161,719	3	%
	December 31, 2013		40,842			3	%	234,394				1	%		82,172		1	%
	(1)	Represents UPB of mortgage loans purchased from Directors' Financial Institutions.
Net Advances to (Repayments from) Related Parties	'
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
	Transactions with Directors' Financial Institutions		2014			2013			2014				2013
	Net Advances (repayments)		$	18,178		$	13,678		$	(6,558	)		$	(108,340	)
	Mortgage loans purchased		14,557			8,110			29,212				21,271

AvailableforSale_Securities_Na

Available-for-Sale Securities (Narrative) (Details) (Private-Label RMBS [Member])	0 Months Ended
	Apr. 04, 2013
	Security
Private-Label RMBS [Member]	'
Available-for-sale Securities [Line Items]	'
Number of AFS securities sold	6
Number of AFS Securities Sold in an Unrealized Loss Position	1

AvailableforSale_Securities_Ma

Available-for-Sale Securities (Major Security Types) (Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'		'
Amortized Cost Basis	$3,512,025	[1]	$3,606,582	[1]
Non-Credit OTTI	-192		-234
Gross Unrealized Gains	62,203		32,793
Gross Unrealized Losses	0		-6,306
Estimated Fair Value	3,574,036		3,632,835
Private Label Residential Mortgage Backed Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Amortized Cost Basis	379,426	[1]	443,749	[1]
Non-Credit OTTI	-192		-234
Gross Unrealized Gains	39,613		26,170
Gross Unrealized Losses	0		0
Estimated Fair Value	418,847		469,685
GSE and TVA debentures [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Amortized Cost Basis	3,132,599	[1]	3,162,833	[1]
Non-Credit OTTI	0		0
Gross Unrealized Gains	22,590		6,623
Gross Unrealized Losses	0		-6,306
Estimated Fair Value	$3,155,189		$3,163,150
[1]	Includes adjustments made to the cost basis of an investment for accretion, amortization, collection of principal, and, if applicable, OTTI recognized in earnings (credit losses) and fair-value hedge accounting adjustments.

AvailableforSale_Securities_Un

Available-for-Sale Securities (Unrealized Loss Positions) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Available-for-sale Securities [Line Items]	'	'
Less than 12 Months, Estimated Fair Value	$0	$880,095
Less than 12 Months, Unrealized Losses	0	-6,306
12 Months or More, Estimated Fair Value	5,869	7,135
12 Months or More, Unrealized Losses	-192	-234
Total Estimated Fair Value	5,869	887,230
Total Unrealized Losses	-192	-6,540
GSE and TVA debentures [Member]	'	'
Available-for-sale Securities [Line Items]	'	'
Less than 12 Months, Estimated Fair Value	0	880,095
Less than 12 Months, Unrealized Losses	0	-6,306
12 Months or More, Estimated Fair Value	0	0
12 Months or More, Unrealized Losses	0	0
Total Estimated Fair Value	0	880,095
Total Unrealized Losses	0	-6,306
Private-Label RMBS [Member]	'	'
Available-for-sale Securities [Line Items]	'	'
Less than 12 Months, Estimated Fair Value	0	0
Less than 12 Months, Unrealized Losses	0	0
12 Months or More, Estimated Fair Value	5,869	7,135
12 Months or More, Unrealized Losses	-192	-234
Total Estimated Fair Value	5,869	7,135
Total Unrealized Losses	($192)	($234)

AvailableforSale_Securities_Ye

Available-for-Sale Securities (Year of Contractual Maturity) (Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Available-for-sale Securities [Line Items]	'		'
Amortized Cost Basis	$3,512,025	[1]	$3,606,582	[1]
Estimated Fair Value	3,574,036		3,632,835
Non-MBS [Member]	'		'
Available-for-sale Securities [Line Items]	'		'
Due after One Year Through Five Years, Amortized Cost	2,492,564		2,046,472
Due after Five Years Through Ten Years, Amortized Cost	640,035		1,083,608
Due after Ten Years, Amortized Cost	0		32,753
Amortized Cost Basis	3,132,599		3,162,833
Due after One Year Through Five Years, Estimated Fair Value	2,506,984		2,052,348
Due after Five Years Through Ten Years, Estimated Fair Value	648,205		1,078,558
Due after Ten Years, Estimated Fair Value	0		32,244
Estimated Fair Value	3,155,189		3,163,150
MBS [Member]	'		'
Available-for-sale Securities [Line Items]	'		'
Amortized Cost Basis	379,426		443,749
Estimated Fair Value	$418,847		$469,685
[1]	Includes adjustments made to the cost basis of an investment for accretion, amortization, collection of principal, and, if applicable, OTTI recognized in earnings (credit losses) and fair-value hedge accounting adjustments.

AvailableforSale_Securities_Re

Available-for-Sale Securities (Realized Gains on AFS Securities) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Available-for-sale Securities [Abstract]	'	'	'	'
Proceeds from sale	$0	$0	$0	$129,471
Previously recognized OTTI credit losses including accretion	0	0	0	38,806
Gross realized gains	0	0	0	17,135
Gross realized losses	0	0	0	0
Net Realized Gains from Sale of Available-for-Sale Securities	$0	$0	$0	$17,135

HeldtoMaturity_Securities_Majo

Held-to-Maturity Securities (Major Security Types) (Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Held-to-maturity Securities [Line Items]	'		'
Amortized Cost	$7,072,582	[1]	$7,146,491	[1]
Non-Credit (OTTI)	-187		-241
Carrying Value	7,072,395	[2]	7,146,250	[2]
Gross Unrecognized Holding Gains	124,796	[3]	116,394	[3]
Gross Unrecognized Holding Losses	-6,791	[3]	-18,326	[3]
Estimated Fair Value	7,190,400		7,244,318
GSE debentures	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Amortized Cost	268,999	[1]	268,998	[1]
Non-Credit (OTTI)	0		0
Carrying Value	268,999	[2]	268,998	[2]
Gross Unrecognized Holding Gains	257	[3]	399	[3]
Gross Unrecognized Holding Losses	0	[3]	0	[3]
Estimated Fair Value	269,256		269,397
Manufactured housing loan ABS	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Amortized Cost	11,618	[1]	12,933	[1]
Non-Credit (OTTI)	0		0
Carrying Value	11,618	[2]	12,933	[2]
Gross Unrecognized Holding Gains	0	[3]	0	[3]
Gross Unrecognized Holding Losses	-1,241	[3]	-1,590	[3]
Estimated Fair Value	10,377		11,343
Home equity loan ABS	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Amortized Cost	1,780	[1]	2,120	[1]
Non-Credit (OTTI)	-187		-241
Carrying Value	1,593	[2]	1,879	[2]
Gross Unrecognized Holding Gains	112	[3]	67	[3]
Gross Unrecognized Holding Losses	-85	[3]	-113	[3]
Estimated Fair Value	1,620		1,833
RMBS and ABS	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Amortized Cost	6,803,583	[1]	6,877,493	[1]
Non-Credit (OTTI)	-187		-241
Carrying Value	6,803,396	[2]	6,877,252	[2]
Gross Unrecognized Holding Gains	124,539	[3]	115,995	[3]
Gross Unrecognized Holding Losses	-6,791	[3]	-18,326	[3]
Estimated Fair Value	6,921,144		6,974,921
Residential Mortgage Backed Securities | Private-label RMBS	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Amortized Cost	111,369	[1]	150,287	[1]
Non-Credit (OTTI)	0		0
Carrying Value	111,369	[2]	150,287	[2]
Gross Unrecognized Holding Gains	566	[3]	185	[3]
Gross Unrecognized Holding Losses	-1,095	[3]	-2,663	[3]
Estimated Fair Value	110,840		147,809
Residential Mortgage Backed Securities | GSE RMBS	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Amortized Cost	3,635,901	[1]	3,592,695	[1]
Non-Credit (OTTI)	0		0
Carrying Value	3,635,901	[2]	3,592,695	[2]
Gross Unrecognized Holding Gains	83,087	[3]	70,572	[3]
Gross Unrecognized Holding Losses	-2,005	[3]	-6,554	[3]
Estimated Fair Value	3,716,983		3,656,713
Residential Mortgage Backed Securities | Other U.S. obligations -guaranteed RMBS	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Amortized Cost	3,042,915	[1]	3,119,458	[1]
Non-Credit (OTTI)	0		0
Carrying Value	3,042,915	[2]	3,119,458	[2]
Gross Unrecognized Holding Gains	40,774	[3]	45,171	[3]
Gross Unrecognized Holding Losses	-2,365	[3]	-7,406	[3]
Estimated Fair Value	$3,081,324		$3,157,223
[1]	Includes adjustments made to the cost basis of an investment for accretion, amortization, collection of principal, and, if applicable, OTTI recognized in earnings (credit losses).
[2]	Represents amortized cost after adjustment for non-credit OTTI recognized in AOCI.
[3]	Represents the difference between estimated fair value and carrying value.

HeldtoMaturity_Securities_Unre

Held-to-Maturity Securities (Unrealized Loss Position) (Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Held-to-maturity Securities [Line Items]	'		'
Less than 12 Months, Estimated Fair Value	$330,388		$2,493,472
12 Months or More, Estimated Fair Value	868,273		624,764
Total Estimated Fair Value	1,198,661		3,118,236
Less than 12 Months, Unrealized Losses	-1,569		-10,468
12 Months or More, Unrealized Losses	-5,297		-8,032
Unrealized Loss Position	-6,866	[1]	-18,500	[1]
Manufactured housing loan ABS	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Less than 12 Months, Estimated Fair Value	0		0
12 Months or More, Estimated Fair Value	10,377		11,343
Total Estimated Fair Value	10,377		11,343
Less than 12 Months, Unrealized Losses	0		0
12 Months or More, Unrealized Losses	-1,241		-1,590
Unrealized Loss Position	-1,241	[1]	-1,590	[1]
Home equity loan ABS	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Less than 12 Months, Estimated Fair Value	0		0
12 Months or More, Estimated Fair Value	1,621		1,833
Total Estimated Fair Value	1,621		1,833
Less than 12 Months, Unrealized Losses	0		0
12 Months or More, Unrealized Losses	-160		-287
Unrealized Loss Position	-160	[1]	-287	[1]
RMBS and ABS	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Less than 12 Months, Estimated Fair Value	330,388		2,493,472
12 Months or More, Estimated Fair Value	868,273		624,764
Total Estimated Fair Value	1,198,661		3,118,236
Less than 12 Months, Unrealized Losses	-1,569		-10,468
12 Months or More, Unrealized Losses	-5,297		-8,032
Unrealized Loss Position	-6,866	[1]	-18,500	[1]
Residential Mortgage Backed Securities | Private-label RMBS	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Less than 12 Months, Estimated Fair Value	4,477		61,059
12 Months or More, Estimated Fair Value	45,271		58,363
Total Estimated Fair Value	49,748		119,422
Less than 12 Months, Unrealized Losses	-7		-561
12 Months or More, Unrealized Losses	-1,088		-2,102
Unrealized Loss Position	-1,095	[1]	-2,663	[1]
Residential Mortgage Backed Securities | GSE RMBS	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Less than 12 Months, Estimated Fair Value	325,911		1,338,255
12 Months or More, Estimated Fair Value	91,784		6,766
Total Estimated Fair Value	417,695		1,345,021
Less than 12 Months, Unrealized Losses	-1,562		-6,542
12 Months or More, Unrealized Losses	-443		-12
Unrealized Loss Position	-2,005	[1]	-6,554	[1]
Residential Mortgage Backed Securities | Other U.S. obligations -guaranteed RMBS	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Less than 12 Months, Estimated Fair Value	0		1,094,158
12 Months or More, Estimated Fair Value	719,220		546,459
Total Estimated Fair Value	719,220		1,640,617
Less than 12 Months, Unrealized Losses	0		-3,365
12 Months or More, Unrealized Losses	-2,365		-4,041
Unrealized Loss Position	($2,365)	[1]	($7,406)	[1]
[1]	For home equity loan ABS, total unrealized losses does not agree to total gross unrecognized holding losses. Total unrealized losses include non-credit-related OTTI losses recorded in AOCI and gross unrecognized holding gains on previously OTTI securities.

HeldtoMaturity_Securities_Rede

Held-to-Maturity Securities (Redemption Terms)(Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Held-to-maturity Securities [Line Items]	'		'
Amortized Cost	$7,072,582	[1]	$7,146,491	[1]
Carrying Value	7,072,395	[2]	7,146,250	[2]
Estimated Fair Value	7,190,400		7,244,318
Non-MBS [Member]	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Due in One Year or Less, Amortized Cost	168,999	[1]	0	[1]
Due After One Year Through Five Years, Amortized Cost	100,000	[1]	268,998	[1]
Amortized Cost	268,999	[1]	268,998	[1]
Due in One Year or Less, Carrying Value	168,999	[2]	0	[2]
Due After One Year Through Five Years, Carrying Value	100,000	[2]	268,998	[2]
Carrying Value	268,999	[2]	268,998	[2]
Due in One Year or Less, Estimated Fair Value	169,133		0
Due After One Year Through Five Years, Estimated Fair Value	100,123		269,397
Estimated Fair Value	269,256		269,397
RMBS and ABS	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Amortized Cost	6,803,583	[1]	6,877,493	[1]
Carrying Value	6,803,396	[2]	6,877,252	[2]
Estimated Fair Value	$6,921,144		$6,974,921
[1]	Includes adjustments made to the cost basis of an investment for accretion, amortization, collection of principal, and, if applicable, OTTI recognized in earnings (credit losses).
[2]	Represents amortized cost after adjustment for non-credit OTTI recognized in AOCI.

OtherThanTemporary_Impairment_1

Other-Than-Temporary Impairment (Securities with OTTI Losses) (Details) (USD $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
	Security				Security		Security
Other than Temporary Impairment, Disclosure [Line Items]	'		'		'		'
Additional credit losses for which OTTI was previously recognized	$42	[1]	$0	[1]	$270	[1]	$1,924	[1]
Number of security changed previous intention to hold until recovery of amortized cost	'		'		'		1
Number of Securities with OTTI Losses	1		'		1		'
Federal Home Loan Bank Assumed Current-to-Trough Home Price Decline Rate	-3.00%		'		-3.00%		'
Federal Home Loan Bank Assumed Current-to-Trough Home Price Increase Rate	9.00%		'		9.00%		'
Private-Label RMBS [Member]	'		'		'		'
Other than Temporary Impairment, Disclosure [Line Items]	'		'		'		'
Assumed Current to Trough Home Price Decline Rate	0.00%		'		0.00%		'
Assumed Current to Trough Home Price Increase Rate	6.00%		'		6.00%		'
Held-to-maturity Securities [Member]	'		'		'		'
Other than Temporary Impairment, Disclosure [Line Items]	'		'		'		'
OTTI Life-to-Date, UPB	737		'		737		'
OTTI Life-to-Date, Amortized Cost	705		'		705		'
OTTI Life-to-Date, Carrying Value	518		'		518		'
OTTI Life-to-Date, Estimated Fair Value	630		'		630		'
Available-for-sale Securities [Member]	'		'		'		'
Other than Temporary Impairment, Disclosure [Line Items]	'		'		'		'
OTTI Life-to-Date, UPB	443,803		'		443,803		'
OTTI Life-to-Date, Amortized Cost	379,426		'		379,426		'
OTTI Life-to-Date, Estimated Fair Value	418,847		'		418,847		'
Prime [Member] | Held-to-maturity Securities [Member] | Private-Label RMBS [Member]	'		'		'		'
Other than Temporary Impairment, Disclosure [Line Items]	'		'		'		'
OTTI Life-to-Date, UPB	0		'		0		'
OTTI Life-to-Date, Amortized Cost	0		'		0		'
OTTI Life-to-Date, Carrying Value	0		'		0		'
OTTI Life-to-Date, Estimated Fair Value	0		'		0		'
Prime [Member] | Available-for-sale Securities [Member] | Private-Label RMBS [Member]	'		'		'		'
Other than Temporary Impairment, Disclosure [Line Items]	'		'		'		'
OTTI Life-to-Date, UPB	443,803		'		443,803		'
OTTI Life-to-Date, Amortized Cost	379,426		'		379,426		'
OTTI Life-to-Date, Estimated Fair Value	418,847		'		418,847		'
Subprime [Member] | Held-to-maturity Securities [Member] | Home equity loan ABS	'		'		'		'
Other than Temporary Impairment, Disclosure [Line Items]	'		'		'		'
OTTI Life-to-Date, UPB	737		'		737		'
OTTI Life-to-Date, Amortized Cost	705		'		705		'
OTTI Life-to-Date, Carrying Value	518		'		518		'
OTTI Life-to-Date, Estimated Fair Value	630		'		630		'
Subprime [Member] | Available-for-sale Securities [Member] | Home equity loan ABS	'		'		'		'
Other than Temporary Impairment, Disclosure [Line Items]	'		'		'		'
OTTI Life-to-Date, UPB	0		'		0		'
OTTI Life-to-Date, Amortized Cost	0		'		0		'
OTTI Life-to-Date, Estimated Fair Value	$0		'		$0		'
[1]	For the three months ended SeptemberB 30, 2014 and 2013, relates to all securities that were impaired prior to July 1, 2014 and 2013, respectively. For the nine months ended September 30, 2014 and 2013, relates to all securities that were impaired prior to January 1, 2014 and 2013, respectively.

OtherThanTemporary_Impairment_2

Other-Than-Temporary Impairment (Significant Modeling Assumptions) (Details) (Securitization in 2006 [Member], Prime [Member], Private Label Residential Mortgage Backed Securities [Member])	3 Months Ended
	Sep. 30, 2014
Securitization in 2006 [Member] | Prime [Member] | Private Label Residential Mortgage Backed Securities [Member]	'
Schedule of Significant Inputs In Measuring Other Than Temporary Impairments Measured in Earnings [Line Items]	'
Prepayment Rates	15.50%	[1]
Default Rates	16.60%	[1]
Loss Severities	40.30%	[1]
Current Credit Enhancement	0.00%	[1]
[1]	Weighted Average based on UPB.

OtherThanTemporary_Impairment_3

Other-Than-Temporary Impairment (Rollforward of the Cumulative Credit Losses) (Details) (USD $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]	'		'		'		'
Balance at Beginning of Period	$71,584		$72,287		$72,287		$109,169
Additions:	'		'		'		'
Additional credit losses for which OTTI was previously recognized	42	[1]	0	[1]	270	[1]	1,924	[1]
Reductions:	'		'		'		'
Credit losses on securities sold, matured, paid down or prepaid	0		0		0		-30,506
Unamortized life-to-date credit losses on security that we intend to sell before recovery of its amortized cost basis	0		0		0		-8,300
Significant increases in cash flows expected to be collected, recognized over the remaining life of the securities (2)	-938	[2]	0	[2]	-1,869	[2]	0	[2]
Balance at End of Period	$70,688		$72,287		$70,688		$72,287
[1]	For the three months ended SeptemberB 30, 2014 and 2013, relates to all securities that were impaired prior to July 1, 2014 and 2013, respectively. For the nine months ended September 30, 2014 and 2013, relates to all securities that were impaired prior to January 1, 2014 and 2013, respectively.
[2]	Represents amounts to be accreted as interest income over the remaining life of the applicable securities.

Advances_Narratives_Details

Advances (Narratives) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
	Borrower	Borrower
Federal Home Loan Bank, Advances [Line Items]	'	'
Total Advances, par value	$19,175,746,000	$17,131,782,000
Federal Home Loan Bank Advances Outstanding Greater Than One Billion Dollars Per Borrower Amount	8,100,000,000	5,300,000,000
Federal Home Loan Bank Advances Outstanding Greater Than One Billion Dollars Per Borrower Percent	42.00%	31.00%
Federal Home Loan Bank, Advances, Outstanding, Greater than One Billion Dollars Per Borrower, Number of Borrowers	5	3
UPB of collateral to cover the Advances to these institutions	14,700,000,000	10,100,000,000
Minimum [Member]	'	'
Federal Home Loan Bank, Advances [Line Items]	'	'
Interest rate of advances outstanding	0.00%	'
Maximum [Member]	'	'
Federal Home Loan Bank, Advances [Line Items]	'	'
Interest rate of advances outstanding	8.34%	'
Federal Home Loan Bank, Advances, Convertible Option [Member]	'	'
Federal Home Loan Bank, Advances [Line Items]	'	'
Total Advances, par value	0	0
Federal Home Loan Bank, Advances, Callable Option [Member]	'	'
Federal Home Loan Bank, Advances [Line Items]	'	'
Total Advances, par value	5,400,000,000	4,100,000,000
Federal Home Loan Bank, Advances, Putable Option [Member]	'	'
Federal Home Loan Bank, Advances [Line Items]	'	'
Total Advances, par value	$179,000,000	$188,000,000

Advances_Advances_by_Year_of_C

Advances Advances by Year of Contractual Maturity (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Year of Contractual Maturity, Amount	'	'
Overdrawn demand and overnight deposit accounts	$959	$1,092
Due in 1 year or less	6,194,403	5,952,161
Due after 1 year through 2 years	2,640,043	1,695,355
Due after 2 years through 3 years	2,383,572	2,289,954
Due after 3 years through 4 years	2,105,242	2,190,551
Due after 4 years through 5 years	1,019,474	1,803,488
Thereafter	4,832,053	3,199,181
Total Advances, par value	19,175,746	17,131,782
Fair-value hedging adjustments	126,822	181,211
Unamortized swap termination fees associated with modified Advances, net of deferred prepayment fees	22,134	24,425
Total Advances	$19,324,702	$17,337,418
Year of Contractual Maturity, WAIR %	'	'
Overdrawn demand and overnight deposit accounts	2.43%	2.50%
Due in 1 year or less	0.64%	0.58%
Due after 1 year through 2 years	1.90%	2.61%
Due after 2 years through 3 years	1.74%	1.59%
Due after 3 years through 4 years	2.18%	1.86%
Due after 4 years through 5 years	1.94%	2.17%
Thereafter	1.43%	1.93%
Total Advances, par value	1.39%	1.50%

Advances_Recognized_Prepayment

Advances Recognized Prepayment/Termination Fees on Advances (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Advances [Abstract]	'	'	'	'
Prepayment fees on Advances	$593	$273	$2,010	$30,807
Associated swap termination fees	24	0	-332	-22,680
Prepayment Fees on Advances, net	$617	$273	$1,678	$8,127

Advances_Deferred_PrepaymentTe

Advances Deferred Prepayment/Termination Fees on Advances (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Advances [Abstract]	'	'	'	'
Deferred prepayment fees on Advances	$477	$197	$477	$12,132
Deferred associated swap termination fees	475	0	475	7,415
Deferred prepayment fees on Advances, net	$2	$197	$2	$4,717

Advances_Earlier_of_Contractua

Advances Earlier of Contractual Maturity or Next Call Date and Year of Contractual Maturity or Next Put Date (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Call Date, Rolling Year, Par Value [Abstract]	'	'
Overdrawn demand and overnight deposit accounts	$959	$1,092
Due in 1 year or less	10,031,518	8,312,526
Due after 1 year through 2 years	2,804,043	1,572,105
Due after 2 years through 3 years	2,150,822	2,293,954
Due after 3 years through 4 years	1,905,242	2,052,801
Due after 4 years through 5 years	954,474	1,653,488
Thereafter	1,328,688	1,245,816
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put or Convert Date, Rolling Year, Par Value [Abstract]	'	'
Due in 1 year or less	6,370,903	6,128,161
Due after 1 year through 2 years	2,611,043	1,683,855
Due after 2 years through 3 years	2,301,072	2,259,954
Due after 3 years through 4 years	2,055,242	2,091,051
Due after 4 years through 5 years	1,004,474	1,768,488
Thereafter	4,832,053	3,199,181
Total Advances, par value	$19,175,746	$17,131,782

Mortgage_Loans_Held_for_Portfo2

Mortgage Loans Held for Portfolio (Details) (USD $)

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Dec. 31, 2012

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Dec. 31, 2012

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Dec. 31, 2012

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

In Thousands, unless otherwise specified

Conventional [Member]

Conventional [Member]

Conventional [Member]

Conventional [Member]

Conventional [Member]

Conventional [Member]

Government [Member]

Government [Member]

Fixed-rate Long-term Mortgages [Member]

Fixed-rate Long-term Mortgages [Member]

Fixed-rate Medium-term Mortgages [Member]

Fixed-rate Medium-term Mortgages [Member]

Fixed-rate Medium-term Mortgages [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPF [Member]

MPF [Member]

MPF [Member]

MPF [Member]

MPF [Member]

MPF [Member]

MPF [Member]

MPF [Member]

MPF [Member]

MPF [Member]

MPF [Member]

MPF [Member]

MPF [Member]

MPF [Member]

Maximum [Member]

Conventional [Member]

Conventional [Member]

Conventional [Member]

Conventional [Member]

Conventional [Member]

Conventional [Member]

Government [Member]

Government [Member]

Fixed-rate Long-term Mortgages [Member]

Fixed-rate Long-term Mortgages [Member]

Fixed-rate Medium-term Mortgages [Member]

Fixed-rate Medium-term Mortgages [Member]

Conventional [Member]

Conventional [Member]

Conventional [Member]

Conventional [Member]

Conventional [Member]

Conventional [Member]

Government [Member]

Government [Member]

Fixed-rate Long-term Mortgages [Member]

Fixed-rate Long-term Mortgages [Member]

Fixed-rate Medium-term Mortgages [Member]

Fixed-rate Medium-term Mortgages [Member]

Mortgage Loans on Real Estate [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Mortgage Loans Held for Portfolio, UPB

$6,349,132

$6,085,433

$5,586,998

'

$5,240,294

'

'

'

$762,134

$845,139

$5,306,731

$4,985,932

$1,042,401

[1]

$1,099,501

[1]

'

$5,826,414

$5,541,391

$5,168,497

'

$4,804,298

'

'

'

$657,917

$737,093

$4,865,767

$4,528,804

$960,647

[1]

$1,012,587

[1]

$522,718

$544,042

$418,501

'

$435,996

'

'

'

$104,217

$108,046

$440,964

$457,128

$81,754

[1]

$86,914

[1]

Unamortized premiums

129,621

117,263

'

'

'

'

'

'

'

'

'

'

'

'

'

120,107

106,346

'

'

'

'

'

'

'

'

'

'

'

'

9,514

10,917

'

'

'

'

'

'

'

'

'

'

'

'

Unamortized discounts

-8,654

-12,230

'

'

'

'

'

'

'

'

'

'

'

'

'

-8,654

-11,942

'

'

'

'

'

'

'

'

'

'

'

'

0

-288

'

'

'

'

'

'

'

'

'

'

'

'

Fair-value hedging adjustments

4,615

3,838

'

'

'

'

'

'

'

'

'

'

'

'

'

5,144

4,374

4,517

'

3,593

'

'

'

'

'

'

'

'

'

-529

-536

-479

'

-488

'

'

'

-51

-48

'

'

'

'

Allowance for loan losses

-3,000

-4,500

-3,000

-3,250

-4,500

-5,500

-5,500

-10,000

'

'

'

'

'

'

'

-2,750

-4,000

-2,750

-3,000

-4,000

-5,000

-5,000

-9,850

'

'

'

'

'

'

-250

-500

-250

-250

-500

-500

-500

-150

'

'

'

'

'

'

Mortgage Loans Held for Portfolio, net

$6,471,714

$6,189,804

'

'

'

'

'

'

'

'

'

'

'

'

'

$5,940,261

$5,636,169

'

'

'

'

'

'

'

'

'

'

'

'

$531,453

$553,635

'

'

'

'

'

'

'

'

'

'

'

'

Original term

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'15 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

[1]

Defined as a term of 15 years or less at origination.

Allowance_for_Credit_Losses_Cr

Allowance for Credit Losses (Credit Enhancements) (Details) (USD $)

3 Months Ended

9 Months Ended

In Thousands, unless otherwise specified

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Dec. 31, 2012

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Dec. 31, 2012

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Dec. 31, 2012

Conventional Loan [Member]

Conventional Loan [Member]

Conventional Loan [Member]

Conventional Loan [Member]

Conventional Loan [Member]

Conventional Loan [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPP [Member]

MPF [Member]

MPF [Member]

MPF [Member]

MPF [Member]

MPF [Member]

MPF [Member]

MPF [Member]

MPF [Member]

Conventional Loan [Member]

Conventional Loan [Member]

Conventional Loan [Member]

Conventional Loan [Member]

Conventional Loan [Member]

Conventional Loan [Member]

Conventional Loan [Member]

Conventional Loan [Member]

Conventional Loan [Member]

Conventional Loan [Member]

Conventional Loan [Member]

Conventional Loan [Member]

Conventional Loan [Member]

Conventional Loan [Member]

Conventional Loan [Member]

Conventional Loan [Member]

Conventional Loan [Member]

Conventional Loan [Member]

PMI [Member]

PMI [Member]

LRA [Member]

LRA [Member]

SMI [Member]

SMI [Member]

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Estimated losses remaining after borrower's equity, before credit enhancements

'

'

'

'

'

'

'

'

'

'

'

'

'

$21,873

'

$31,523

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Portion of estimated losses recoverable from

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-3,273

-4,922

-4,000

-5,072

-12,049

-18,740

'

'

'

'

'

'

'

'

Allowance for unrecoverable PMI/SMI

'

'

'

'

'

'

'

'

'

'

'

'

'

199

'

1,211

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Allowance for loan losses

3,000

'

3,000

'

4,500

3,000

3,250

4,500

5,500

5,500

10,000

2,750

4,000

2,750

3,000

4,000

5,000

5,000

9,850

'

'

'

'

'

'

250

500

250

250

500

500

500

150

Credit Enhancement Fund [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Balance of LRA, beginning of period

49,918

40,091

45,330

33,693

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Additions

5,807

3,856

11,917

12,555

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Claim paid

-411

-662

-1,664

-2,422

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Distributions

-93

-220

-362

-761

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Balance of LRA, end of period

55,221

43,065

55,221

43,065

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit enhancement fee paid to participating financial institutions, gross

99

90

302

207

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Exposure under FLA

3,420

'

3,420

'

3,338

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

CE Obligations available to cover losses in excess of the FLA

26,851

'

26,851

'

26,284

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

FLA loss reduction

$11

'

$11

'

$142

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Allowance_for_Credit_Losses_Al

Allowance for Credit Losses (Allowance) (Details) (USD $)	3 Months Ended			9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013	Dec. 31, 2013
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Allowance for loan losses on mortgage loans, beginning of period	'		'	$4,500		'	'
Provision for (Reversal of) Loan Losses	-126		314	-916		-3,451	'
Allowance for loan losses on mortgage loans, end of period	3,000		'	3,000		'	'
Total allowance for loan losses	3,000		'	3,000		'	'
Total recorded investment	6,500,853		'	6,500,853		'	6,218,184
Conventional Loan [Member]	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Allowance for loan losses on mortgage loans, beginning of period	3,250		5,500	4,500		10,000	'
Charge-offs, net of recoveries	-124		-314	-584		-1,049	'
Provision for (Reversal of) Loan Losses	-126		314	-916		-3,451	'
Allowance for loan losses on mortgage loans, end of period	3,000		5,500	3,000		5,500	'
Allowance for loan losses, loans collectively evaluated for impairment	2,542		'	2,542		'	3,565
Allowance for loan losses, loans individually evaluated for impairment	458	[1]	'	458	[1]	'	935	[1]
Total allowance for loan losses	3,000		5,500	3,000		5,500	'
Recorded Investment, loans collectively evaluated for impairment	5,698,967		'	5,698,967		'	5,330,215
Recorded Investment, loans individually evaluated for impairment	19,137	[1]	'	19,137	[1]	'	18,355	[1]
Total recorded investment	5,718,104		'	5,718,104		'	5,348,570
Principal paid in full by servicers	8,100		'	8,100		'	13,976
Potential claims included in allowance	417		'	417		'	895
MPP [Member]	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Allowance for loan losses on mortgage loans, beginning of period	'		'	'		'	4,000
Allowance for loan losses on mortgage loans, end of period	2,750		'	2,750		'	4,000
Total allowance for loan losses	2,750		'	2,750		'	4,000
MPP [Member] | Conventional Loan [Member]	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Allowance for loan losses on mortgage loans, beginning of period	3,000		5,000	4,000		9,850	'
Charge-offs, net of recoveries	-124		-314	-575		-1,049	'
Provision for (Reversal of) Loan Losses	-126		314	-675		-3,801	'
Allowance for loan losses on mortgage loans, end of period	2,750		5,000	2,750		5,000	'
Allowance for loan losses, loans collectively evaluated for impairment	2,292		'	2,292		'	3,065
Allowance for loan losses, loans individually evaluated for impairment	458	[1]	'	458	[1]	'	935	[1]
Total allowance for loan losses	2,750		5,000	2,750		5,000	'
Recorded Investment, loans collectively evaluated for impairment	5,270,562		'	5,270,562		'	4,883,419
Recorded Investment, loans individually evaluated for impairment	19,137	[1]	'	19,137	[1]	'	18,355	[1]
Total recorded investment	5,289,699		'	5,289,699		'	4,901,774
MPF [Member]	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Allowance for loan losses on mortgage loans, beginning of period	'		'	'		'	500
Allowance for loan losses on mortgage loans, end of period	250		'	250		'	500
Total allowance for loan losses	250		'	250		'	500
MPF [Member] | Conventional Loan [Member]	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Allowance for loan losses on mortgage loans, beginning of period	250		500	500		150	'
Charge-offs, net of recoveries	0		0	-9		0	'
Provision for (Reversal of) Loan Losses	0		0	-241		350	'
Allowance for loan losses on mortgage loans, end of period	250		500	250		500	'
Allowance for loan losses, loans collectively evaluated for impairment	250		'	250		'	500
Allowance for loan losses, loans individually evaluated for impairment	0	[1]	'	0	[1]	'	0	[1]
Total allowance for loan losses	250		500	250		500	'
Recorded Investment, loans collectively evaluated for impairment	428,405		'	428,405		'	446,796
Recorded Investment, loans individually evaluated for impairment	0	[1]	'	0	[1]	'	0	[1]
Total recorded investment	$428,405		'	$428,405		'	$446,796
[1]	The recorded investment in our MPP conventional loans individually evaluated for impairment excludes principal that was previously paid in full by the servicers as of SeptemberB 30, 2014 and DecemberB 31, 2013 of $8,100 and $13,976, respectively, that remains subject to potential claims by those servicers for any losses resulting from past or future liquidations of the underlying properties. However, the MPP conventional loan allowance for loan losses includes $417 and $895 for these potential claims as of SeptemberB 30, 2014 and DecemberB 31, 2013, respectively.

Allowance_for_Credit_Losses_Pa

Allowance for Credit Losses (Past Due) (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]	'		'
Past due 30-59 days delinquent	$81,857		$95,139
Past due 60-89 days delinquent	21,178		26,197
Past due 90 days or more delinquent	56,506		80,975
Total past due	159,541		202,311
Total current	6,341,312		6,015,873
Total recorded investment	6,500,853		6,218,184
Net unamortized premiums	-120,967		-105,033
Fair-value hedging adjustments	-4,615		-3,838
Accrued interest receivable	-26,139		-23,880
Mortgage Loans Held for Portfolio, UPB	6,349,132		6,085,433
In process of foreclosure, included above	38,315	[1]	47,970	[1]
Serious delinquency rate	0.87%	[2]	1.30%	[2]
Past due 90 days or more still accruing interest	54,656	[3]	80,333	[3]
On non-accrual status	2,389		1,304
Delinquent loan receivable (in days)	'90 days		'
Conventional [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total recorded investment	5,718,104		5,348,570
Mortgage Loans Held for Portfolio, UPB	5,586,998		5,240,294
Government [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Mortgage Loans Held for Portfolio, UPB	762,134		845,139
MPP [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Fair-value hedging adjustments	-5,144		-4,374
Mortgage Loans Held for Portfolio, UPB	5,826,414		5,541,391
MPP [Member] | Conventional [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Past due 30-59 days delinquent	52,697		55,615
Past due 60-89 days delinquent	15,006		18,203
Past due 90 days or more delinquent	54,080		76,611
Total past due	121,783		150,429
Total current	5,167,916		4,751,345
Total recorded investment	5,289,699		4,901,774
Net unamortized premiums	-95,588		-75,381
Fair-value hedging adjustments	-4,517		-3,593
Accrued interest receivable	-21,097		-18,502
Mortgage Loans Held for Portfolio, UPB	5,168,497		4,804,298
In process of foreclosure, included above	38,315	[1]	47,970	[1]
Serious delinquency rate	1.02%	[2]	1.56%	[2]
Past due 90 days or more still accruing interest	52,231	[3]	76,099	[3]
On non-accrual status	2,388		1,174
MPP [Member] | FHA Loans [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Past due 30-59 days delinquent	26,125		38,963
Past due 60-89 days delinquent	5,813		7,438
Past due 90 days or more delinquent	2,070		4,234
Total past due	34,008		50,635
Total current	642,865		709,032
Total recorded investment	676,873		759,667
Net unamortized premiums	-15,865		-19,023
Fair-value hedging adjustments	-628		-781
Accrued interest receivable	-2,463		-2,770
Mortgage Loans Held for Portfolio, UPB	657,917		737,093
In process of foreclosure, included above	0	[1]	0	[1]
Serious delinquency rate	0.31%	[2]	0.56%	[2]
Past due 90 days or more still accruing interest	2,070	[3]	4,234	[3]
On non-accrual status	0		0
MPP [Member] | Government [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Mortgage Loans Held for Portfolio, UPB	657,917		737,093
MPF [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Fair-value hedging adjustments	529		536
Mortgage Loans Held for Portfolio, UPB	522,718		544,042
MPF [Member] | Conventional [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Past due 30-59 days delinquent	925		179
Past due 60-89 days delinquent	1		1
Past due 90 days or more delinquent	1		130
Total past due	927		310
Total current	427,478		446,486
Total recorded investment	428,405		446,796
Net unamortized premiums	-8,245		-9,126
Fair-value hedging adjustments	479		488
Accrued interest receivable	-2,138		-2,162
Mortgage Loans Held for Portfolio, UPB	418,501		435,996
In process of foreclosure, included above	0	[1]	0	[1]
Serious delinquency rate	0.00%	[2]	0.03%	[2]
Past due 90 days or more still accruing interest	0	[3]	0	[3]
On non-accrual status	1		130
MPF [Member] | Government [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Past due 30-59 days delinquent	2,110		382
Past due 60-89 days delinquent	358		555
Past due 90 days or more delinquent	355		0
Total past due	2,823		937
Total current	103,053		109,010
Total recorded investment	105,876		109,947
Net unamortized premiums	-1,269		-1,503
Fair-value hedging adjustments	51		48
Accrued interest receivable	-441		-446
Mortgage Loans Held for Portfolio, UPB	104,217		108,046
In process of foreclosure, included above	0	[1]	0	[1]
Serious delinquency rate	0.34%	[2]	0.00%	[2]
Past due 90 days or more still accruing interest	355	[3]	0	[3]
On non-accrual status	$0		$0
[1]	Includes loans for which the decision of foreclosure or similar alternative, such as pursuit of deed-in-lieu of foreclosure, has been reported. Loans in process of foreclosure are included in past due categories depending on their delinquency status.
[2]	Represents loans 90 days or more past due (including loans in process of foreclosure) expressed as a percentage of the total recorded investment in mortgage loans. The percentage excludes principal amounts that were previously paid in full by the servicers on conventional loans that are pending resolution of potential loss claims. Many FHA loans are repurchased by the servicers when they reach 90 days or more delinquent status, similar to the rules for servicers of Ginnie Mae MBS, resulting in the lower serious delinquency rate for FHA loans.
[3]	Although our past due scheduled/scheduled MPP loans are classified as loans past due 90 days or more based on the mortgagor's payment status, we do not consider these loans to be non-accrual.

Allowance_for_Credit_Losses_Tr

Allowance for Credit Losses (Troubled Debt Restructuring) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Period of time principal or interest past due to have defaulted on troubled debt restructuring	'	'	'60 days	'	'
Recorded investment of loans modified as troubled debt restructurings that subsequently default	$0	$366	$0	$911	'
MPP [Member] | Conventional [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Recorded Investment, Performing	18,414	'	18,414	'	17,407
Financing Receivable, Modifications, Recorded Investment, Non-Performing	723	'	723	'	948
Recorded Investment	19,137	'	19,137	'	18,355
Pre-Modification Recorded Investment	0	767	2,439	4,060	'
Post-Modification Recorded Investment	0	802	2,593	4,306	'
MPF [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Decrease in real estate owned due to liquidation	$117	'	'	'	'

Allowance_for_Credit_Losses_Im

Allowance for Credit Losses (Impaired Debt) (Details) (MPP [Member], Conventional [Member], USD $)	3 Months Ended			9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013	Dec. 31, 2013
MPP [Member] | Conventional [Member]	'		'	'		'	'
Financing Receivable, Impaired [Line Items]	'		'	'		'	'
Conventional loans without allowance for loan losses, Recorded Investment	$18,414	[1]	'	$18,414	[1]	'	$17,407	[1]
Conventional loans with allowance for loan losses, Recorded Investment	723		'	723		'	948
Total recorded investment	19,137		'	19,137		'	18,355
Conventional loans without allowance for loan losses, UPB	18,248	[1]	'	18,248	[1]	'	17,239	[1]
Conventional loans with allowance for loan losses, UPB	710		'	710		'	928
Total UPB	18,958		'	18,958		'	18,167
Allowance for loan losses	41		'	41		'	40
Conventional Loans without Allowance, Average Recorded Investment	18,843		17,447	18,389		16,396	'
Conventional Loans without Allowance, Interest Income Recognized	267		253	798		708	'
Conventional Loans with Allowance, Average Recorded Investment	725		1,143	728		1,142	'
Conventional Loans with Allowance, Interest Income Recognized	10		17	40		82	'
Impaired Financing Receivable, Average Recorded Investment	19,568		18,590	19,117		17,538	'
Impaired Financing Receivable, Interest Income, Accrual Method	$277		$270	$838		$790	'
[1]	No allowance for loan losses was recorded on these impaired loans after consideration of the underlying loan-specific attribute data, estimated liquidation value of real estate collateral held, estimated costs associated with maintaining and disposing of the collateral, and credit enhancements.

Derivative_and_Hedging_Activit2

Derivative and Hedging Activities (Derivatives in Statement of Condition) (Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Derivatives, Fair Value [Line Items]	'		'
Notional Amount of Derivatives	$30,937,572		$29,564,222
Derivative asset not subject to netting arrangement	88,575		127,826
Derivative liability not subject to netting arrangement	377,289		546,958
Netting adjustment, assets	-81,449		-119,488
Netting adjustment, liabilities	-81,449		-119,488
Cash collateral and related accrued interest, assets	11,863		-1,124
Cash collateral and related accrued interest, liabilities	-203,831		-317,726
Total adjustment, assets	-69,586	[1]	-120,612	[1]
Total adjustment, liabilities	-285,280	[1]	-437,214	[1]
Derivative Asset, net	18,989		7,214
Derivative Liability, net	92,009		109,744
Designated as Hedging Instrument [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Notional Amount of Derivatives	28,823,647		26,758,882
Derivative asset not subject to netting arrangement	87,484		125,431
Derivative liability not subject to netting arrangement	375,642		540,995
Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Notional Amount of Derivatives	28,823,647		26,758,882
Derivative asset not subject to netting arrangement	87,484		125,431
Derivative liability not subject to netting arrangement	375,642		540,995
Not Designated as Hedging Instrument [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Notional Amount of Derivatives	2,113,925		2,805,340
Derivative asset not subject to netting arrangement	1,091		2,395
Derivative liability not subject to netting arrangement	1,647		5,963
Not Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Notional Amount of Derivatives	1,454,721		2,344,743
Derivative asset not subject to netting arrangement	470		823
Derivative liability not subject to netting arrangement	1,561		5,706
Not Designated as Hedging Instrument [Member] | Interest Rate Caps / Floors [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Notional Amount of Derivatives	340,500		340,500
Derivative asset not subject to netting arrangement	295		1,327
Derivative liability not subject to netting arrangement	0		0
Not Designated as Hedging Instrument [Member] | Forward Contracts [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Notional Amount of Derivatives	159,700		61,300
Derivative asset not subject to netting arrangement	76		233
Derivative liability not subject to netting arrangement	46		11
Not Designated as Hedging Instrument [Member] | Mortgage Delivery Commitments [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Notional Amount of Derivatives	159,004		58,797
Derivative asset not subject to netting arrangement	250		12
Derivative liability not subject to netting arrangement	$40		$246
[1]	Represents the application of the netting requirements that allow us to settle (i) positive and negative positions and (ii) cash collateral and related accrued interest held or placed, with the same clearing agent and/or counterparty.

Derivative_and_Hedging_Activit3

Derivative and Hedging Activities (Offsetting of Derivative Assets and Derivative Liabilities) (Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Derivative Instruments and Hedging Activities Disclosures [Line Items]	'		'
Derivative Asset, Fair Value, Gross Asset	$88,249		$127,581
Derivative Liability, Fair Value, Gross Liability	377,203		546,701
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	-69,586	[1]	-120,612	[1]
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	-285,280	[1]	-437,214	[1]
Derivative Asset, Net Fair Value Amount, After Offsetting Adjustment	18,663		6,969
Derivative Liability, Net Fair Value Amount, After Offsetting Adjustment	91,923		109,487
Derivative Asset, Not Subject to Master Netting Arrangement	326		245	[2]
Derivative Liability, Not Subject to Master Netting Arrangement	86		257	[2]
Derivative Asset, net	18,989		7,214
Derivative Liability, net	92,009		109,744
Over the Counter [Member]	'		'
Derivative Instruments and Hedging Activities Disclosures [Line Items]	'		'
Derivative Asset, Fair Value, Gross Asset	81,997		122,411
Derivative Liability, Fair Value, Gross Liability	361,157		544,014
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	-81,449		-121,425
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	-269,234		-434,527
Derivative Asset, Net Fair Value Amount, After Offsetting Adjustment	548		986
Derivative Liability, Net Fair Value Amount, After Offsetting Adjustment	91,923		109,487
Exchange Cleared [Member]	'		'
Derivative Instruments and Hedging Activities Disclosures [Line Items]	'		'
Derivative Asset, Fair Value, Gross Asset	6,252		5,170
Derivative Liability, Fair Value, Gross Liability	16,046		2,687
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	11,863		813
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	-16,046		-2,687
Derivative Asset, Net Fair Value Amount, After Offsetting Adjustment	18,115		5,983
Derivative Liability, Net Fair Value Amount, After Offsetting Adjustment	$0		$0
[1]	Represents the application of the netting requirements that allow us to settle (i) positive and negative positions and (ii) cash collateral and related accrued interest held or placed, with the same clearing agent and/or counterparty.
[2]	Includes MDCs and certain interest-rate forwards.

Derivative_and_Hedging_Activit4

Derivative and Hedging Activities (Derivatives in Statement of Income) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Total net gain (loss) related to fair-value hedge ineffectiveness	$233	($1,353)	($3,286)	$8,596
Total net gain (loss) on derivatives not designated as hedging instruments	444	1,228	10,069	2,075
Net Gains (Losses) on Derivatives and Hedging Activities	677	-125	6,783	10,671
Interest Rate Swaps [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Total net gain (loss) related to fair-value hedge ineffectiveness	233	-1,353	-3,286	8,596
Total net gain (loss) on derivatives not designated as hedging instruments	-1,868	62	3,903	5,002
Interest Rate Caps / Floors [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Total net gain (loss) on derivatives not designated as hedging instruments	-158	-405	-1,033	189
Forward Contracts [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Total net gain (loss) on derivatives not designated as hedging instruments	-365	334	-3,790	6,119
Net Interest Settlements [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Total net gain (loss) on derivatives not designated as hedging instruments	2,955	194	8,395	-4,063
Mortgage Delivery Commitments [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Total net gain (loss) on derivatives not designated as hedging instruments	($120)	$1,043	$2,594	($5,172)

Derivative_and_Hedging_Activit5

Derivative and Hedging Activities (Derivatives in Statement of Income and Impact on Interest) (Details) (USD $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items]	'		'		'		'
Gain (Loss) on Derivatives	$61,472		$10,524		$86,468		$224,710
Gain (Loss) on Hedged Item	-61,239		-11,877		-89,754		-216,114
Net Fair Value Hedge Ineffectiveness	233		-1,353		-3,286		8,596
Effect on Net Interest Income	-46,598	[1]	-53,640	[1]	-130,716	[1]	-161,690	[1]
Advances [Member]	'		'		'		'
Derivative Instruments, Gain (Loss) [Line Items]	'		'		'		'
Gain (Loss) on Derivatives	45,658		-8,893		24,525		197,316
Gain (Loss) on Hedged Item	-45,938		7,160		-24,358		-194,821
Net Fair Value Hedge Ineffectiveness	-280		-1,733		167		2,495
Effect on Net Interest Income	-38,558	[1]	-50,794	[1]	-111,842	[1]	-154,036	[1]
AFS Securities [Member]	'		'		'		'
Derivative Instruments, Gain (Loss) [Line Items]	'		'		'		'
Gain (Loss) on Derivatives	29,428		3,694		21,569		124,730
Gain (Loss) on Hedged Item	-29,991		-3,524		-22,010		-122,879
Net Fair Value Hedge Ineffectiveness	-563		170		-441		1,851
Effect on Net Interest Income	-24,487	[1]	-24,196	[1]	-73,508	[1]	-72,335	[1]
Consolidated Obligation Bonds Member	'		'		'		'
Derivative Instruments, Gain (Loss) [Line Items]	'		'		'		'
Gain (Loss) on Derivatives	-13,614		15,723		40,374		-97,336
Gain (Loss) on Hedged Item	14,690		-15,513		-43,386		101,586
Net Fair Value Hedge Ineffectiveness	1,076		210		-3,012		4,250
Effect on Net Interest Income	$16,447	[1]	$21,350	[1]	$54,634	[1]	$64,681	[1]
[1]	Includes the effect of derivatives in fair-value hedging relationships on Net Interest Income that is recorded in the Interest Income / Expense line item of the respective hedged items. Excludes the Interest Income / Expense of the respective hedged items, which fully offset the Interest Income / Expense of the derivatives, except to the extent of any hedge ineffectiveness. Net interest settlements on derivatives that are not in fair-value hedging relationships are reported in Other Income (Loss).

Derivative_and_Hedging_Activit6

Derivative and Hedging Activities (Narrative) (Details) (USD $)	Sep. 30, 2014
In Thousands, unless otherwise specified
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative, Net Liability Position, Aggregate Fair Value	$283,752
Collateral Already Posted, Aggregate Fair Value	191,855
Derivative, Net Liability Position, Aggregate Fair Value, Not Subject to Credit Support Agreement	86
Additional Collateral, Aggregate Fair Value	$858

Consolidated_Obligations_Detai

Consolidated Obligations (Details) (USD $)	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
	Bank
Schedule of Short-term and Long-term Debt [Line Items]	'	'
Number of Federal Home Loan Banks	12	'
Discount Notes maturity period	'1 year	'
Discount Note [Abstract]	'	'
Discount Notes	$10,105,640,000	$7,434,890,000
CO Bonds [Abstract]	'	'
Federal Home Loan Bank, Consolidated Obligations, Bonds, Due in One Year or Less	12,548,950,000	12,459,650,000
Federal Home Loan Bank, Consolidated Obligations, Bonds, Due in Year Two	2,390,500,000	1,940,550,000
Federal Home Loan Bank, Consolidated Obligations, Bonds, Due in Year Three	2,061,850,000	1,359,400,000
Federal Home Loan Bank, Consolidated Obligations, Bonds, Due in Year Four	2,208,500,000	1,539,200,000
Federal Home Loan Bank, Consolidated Obligations, Bonds, Due in Year Five	1,014,300,000	1,690,100,000
Federal Home Loan Bank, Consolidated Obligations, Bonds, Due After Year Five	6,710,000,000	7,654,200,000
CO Bonds	26,914,095,000	26,583,925,000
CO Bonds [Member]	'	'
CO Bonds [Abstract]	'	'
Unamortized premiums	26,589,000	32,455,000
Unamortized discounts	-15,468,000	-16,031,000
Fair-value hedging adjustments	-31,126,000	-75,599,000
Due in 1 year or less, WAIR %	0.40%	0.43%
Due after 1 year through 2 years, WAIR %	1.18%	1.27%
Due after 2 years through 3 years, WAIR %	1.30%	1.93%
Due after 3 years through 4 years, WAIR %	1.93%	2.08%
Due after 4 years through 5 years, WAIR %	2.44%	1.56%
Thereafter, WAIR %	3.04%	2.92%
Total WAIR%	1.40%	1.45%
Earlier of Contractual Maturity or Next Call Date [Member]	'	'
CO Bonds [Abstract]	'	'
Federal Home Loan Bank, Consolidated Obligations, Bonds, Due in One Year or Less	20,550,950,000	20,900,650,000
Federal Home Loan Bank, Consolidated Obligations, Bonds, Due in Year Two	2,260,500,000	1,583,550,000
Federal Home Loan Bank, Consolidated Obligations, Bonds, Due in Year Three	839,850,000	954,400,000
Federal Home Loan Bank, Consolidated Obligations, Bonds, Due in Year Four	667,500,000	649,200,000
Federal Home Loan Bank, Consolidated Obligations, Bonds, Due in Year Five	556,300,000	283,100,000
Federal Home Loan Bank, Consolidated Obligations, Bonds, Due After Year Five	2,059,000,000	2,272,200,000
Non Callable / Non Putable [Member]	'	'
CO Bonds [Abstract]	'	'
CO Bonds	18,922,100,000	17,677,100,000
Callable [Member]	'	'
CO Bonds [Abstract]	'	'
CO Bonds	8,012,000,000	8,966,000,000
Discount Notes [Member]	'	'
Discount Note [Abstract]	'	'
Weighted average effective interest rate	0.10%	0.12%
FHLBanks [Member]	'	'
Schedule of Short-term and Long-term Debt [Line Items]	'	'
Consolidated obligation	816,900,000,000	766,800,000,000
Carrying Value [Member]	'	'
Discount Note [Abstract]	'	'
Discount Notes	10,105,640,000	7,434,890,000
CO Bonds [Abstract]	'	'
CO Bonds	26,914,095,000	26,583,925,000
Par Value [Member]	'	'
Discount Note [Abstract]	'	'
Discount Notes	10,107,866,000	7,435,940,000
CO Bonds [Abstract]	'	'
CO Bonds	$26,934,100,000	$26,643,100,000

Affordable_Housing_Program_Det

Affordable Housing Program (Details) (USD $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Affordable Housing Program Funding Obligation [Roll Forward]	'		'		'		'
Balance at beginning of period	$43,351		$41,050		$42,778		$34,362
Assessment expense	3,765		3,442		11,270		16,066
Subsidy usage, net	-5,431	[1]	-4,718	[1]	-12,363	[1]	-10,654	[1]
Balance at end of period	$41,685		$39,774		$41,685		$39,774
[1]	Subsidies disbursed are reported net of returns/recaptures of previously disbursed subsidies.

Capital_Details

Capital (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
	Member		Member		Member
Regulatory Capital Requirements [Abstract]	'	'	'	'	'
Risk-based capital, Required	$624,819	'	$624,819	'	$764,917
Risk-based capital, Actual	2,541,804	'	2,541,804	'	2,378,670
Regulatory permanent capital-to-asset ratio, Required	4.00%	'	4.00%	'	4.00%
Regulatory permanent capital-to-asset ratio, Actual	6.19%	'	6.19%	'	6.30%
Regulatory permanent capital, Required	1,641,526	'	1,641,526	'	1,511,448
Regulatory permanent capital, Actual	2,541,804	'	2,541,804	'	2,378,670
Leverage ratio, Required	5.00%	'	5.00%	'	5.00%
Leverage ratio, Actual	9.29%	'	9.29%	'	9.44%
Leverage capital, Required	2,051,908	'	2,051,908	'	1,889,310
Leverage capital, Actual	3,812,706	'	3,812,706	'	3,568,005
Mandatorily Redeemable Capital Stock [Abstract]	'	'	'	'	'
Number of former members holding MRCS	8	'	8	'	7
Mandatorily Redeemable Capital Stock Acitvity [Roll Forward]	'	'	'	'	'
Liability at beginning of period	16,785	255,720	16,787	450,716	'
Additions due to change in membership status	47	0	47	95,441	'
Redemptions/repurchases	-695	-401	-697	-290,975	'
Accrued dividends	0	0	0	137	'
Liability at end of period	16,137	255,319	16,137	255,319	'
Repurchase of excess stock held, par value	'	'	'	250,000	'
Excess capital stock redeemed	'	'	'	40,975	'
Redemption period	'	'	'5 years	'	'
Recorded as Interest Expense	129	2,225	874	6,713	'
Recorded as distributions from Retained Earnings	0	0	0	137	'
Total	129	2,225	874	6,850	'
Excess and Surplus Capital Stock [Abstract]	'	'	'	'	'
Excess Capital Stock to Assets Allowed	1.00%	'	1.00%	'	'
Excess Capital Stock	$593,088	'	$593,088	'	'
Excess Capital Stock to Assets	1.40%	'	1.40%	'	'

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income [Roll Forward]	'	'	'	'
Net change in fair value	($46)	($84)	($227)	$35,095
Net realized gains from sale	0	0	0	17,135
Pension Benefits	-36	6,175	-108	6,874
Total Other Comprehensive Income	10,247	10,975	35,704	24,960
Accumulated Other Comprehensive Income (Loss) [Member]	'	'	'	'
Accumulated Other Comprehensive Income [Roll Forward]	'	'	'	'
AOCI Balance, Beginning	47,177	3,927	21,720	-10,058
Net change in unrealized gains (losses)	10,265	4,866	35,715	-1,853
Net change in fair value	-46	-84	-227	35,095
Accretion of non-credit loss	22	18	54	55
Net realized gains from sale	'	0	'	-17,135
Non-credit portion of OTTI losses	42	'	270	1,924
Pension Benefits	-36	6,175	-108	6,874
Total Other Comprehensive Income	10,247	10,975	35,704	24,960
AOCI Balance, Ending	57,424	14,902	57,424	14,902
Unrealized Gains (Losses) on Investments [Member] | Available-for-sale Securities [Member]	'	'	'	'
Accumulated Other Comprehensive Income [Roll Forward]	'	'	'	'
AOCI Balance, Beginning	12,894	475	317	12,335
Net change in unrealized gains (losses)	9,696	2,392	22,273	-9,468
Total Other Comprehensive Income	9,696	2,392	22,273	-9,468
AOCI Balance, Ending	22,590	2,867	22,590	2,867
Non-Credit OTTI [Member] | Available-for-sale Securities [Member]	'	'	'	'
Accumulated Other Comprehensive Income [Roll Forward]	'	'	'	'
AOCI Balance, Beginning	38,856	15,425	25,936	-9,684
Net change in unrealized gains (losses)	569	2,474	13,442	7,615
Net change in fair value	-46	-84	-227	35,095
Net realized gains from sale	'	0	'	-17,135
Non-credit portion of OTTI losses	42	'	270	1,924
Total Other Comprehensive Income	565	2,390	13,485	27,499
AOCI Balance, Ending	39,421	17,815	39,421	17,815
Non-Credit OTTI [Member] | Held-to-maturity Securities [Member]	'	'	'	'
Accumulated Other Comprehensive Income [Roll Forward]	'	'	'	'
AOCI Balance, Beginning	-209	-275	-241	-312
Accretion of non-credit loss	22	18	54	55
Total Other Comprehensive Income	22	18	54	55
AOCI Balance, Ending	-187	-257	-187	-257
Pension Benefits [Member]	'	'	'	'
Accumulated Other Comprehensive Income [Roll Forward]	'	'	'	'
AOCI Balance, Beginning	-4,364	-11,698	-4,292	-12,397
Pension Benefits	-36	6,175	-108	6,874
Total Other Comprehensive Income	-36	6,175	-108	6,874
AOCI Balance, Ending	($4,400)	($5,523)	($4,400)	($5,523)

Segment_Information_Details

Segment Information (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]	'	'	'	'	'
Net Interest Income	$47,258	$52,126	$137,434	$173,133	'
Provision for (Reversal of) Credit Losses	-126	314	-916	-3,451	'
Other Income (Loss)	6,820	551	22,667	28,463	'
Other Expenses	16,687	20,165	49,194	51,098	'
Income Before Assessments	37,517	32,198	111,823	153,949	'
Affordable Housing Program Assessments	3,765	3,442	11,270	16,066	'
Net Income	33,752	28,756	100,553	137,883	'
Assets	41,038,155	'	41,038,155	'	37,786,190
Traditional [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Net Interest Income	30,128	34,486	89,080	112,715	'
Provision for (Reversal of) Credit Losses	0	0	0	0	'
Other Income (Loss)	7,266	-856	23,732	27,359	'
Other Expenses	14,565	18,324	42,808	46,347	'
Income Before Assessments	22,829	15,306	70,004	93,727	'
Affordable Housing Program Assessments	2,296	1,753	7,088	10,044	'
Net Income	20,533	13,553	62,916	83,683	'
Assets	34,566,441	'	34,566,441	'	31,596,386
Mortgage Loans [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Net Interest Income	17,130	17,640	48,354	60,418	'
Provision for (Reversal of) Credit Losses	-126	314	-916	-3,451	'
Other Income (Loss)	-446	1,407	-1,065	1,104	'
Other Expenses	2,122	1,841	6,386	4,751	'
Income Before Assessments	14,688	16,892	41,819	60,222	'
Affordable Housing Program Assessments	1,469	1,689	4,182	6,022	'
Net Income	13,219	15,203	37,637	54,200	'
Assets	$6,471,714	'	$6,471,714	'	$6,189,804

Estimated_Fair_Values_Carrying

Estimated Fair Values (Carrying Value and Fair Value of Financial Instruments) (Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Assets:	'		'
Interest-Bearing Deposits	$285		$485
AFS Securities	3,574,036		3,632,835
HTM Securities	7,190,400		7,244,318
Derivative Asset, net	18,989		7,214
Derivative asset not subject to netting arrangement	88,575		127,826
Netting adjustment	-69,586	[1]	-120,612	[1]
Consolidated Obligations:	'		'
Discount Notes	10,105,640		7,434,890
CO Bonds	26,914,095		26,583,925
Derivative Liabilities, net (Note 9)	92,009		109,744
Derivative liability not subject to netting arrangement	377,289		546,958
Netting adjustment	-285,280	[1]	-437,214	[1]
Level 1 [Member]	'		'
Assets:	'		'
Cash and Due from Banks	4,444,619		3,318,564
Interest-Bearing Deposits	0		0
AFS Securities	0		0
HTM Securities	0		0
Advances	0		0
Mortgage Loans Held for Portfolio, net	0		0
Accrued Interest Receivable	0		0
Derivative asset not subject to netting arrangement	0		0
Grantor Trust Assets (included in Other Assets)	12,906		12,483
Liabilities:	'		'
Deposits	0		0
Consolidated Obligations:	'		'
Discount Notes	0		0
CO Bonds	0		0
Accrued Interest Payable	0		0
Derivative liability not subject to netting arrangement	0		0
MRCS	16,137		16,787
Level 2 [Member]	'		'
Assets:	'		'
Cash and Due from Banks	0		0
Interest-Bearing Deposits	'		485
AFS Securities	3,155,189		3,163,150
HTM Securities	7,067,563		7,083,333
Advances	19,384,314		17,428,710
Mortgage Loans Held for Portfolio, net	6,632,312		6,228,216
Accrued Interest Receivable	79,329		79,072
Derivative asset not subject to netting arrangement	88,575		127,826
Grantor Trust Assets (included in Other Assets)	0		0
Liabilities:	'		'
Deposits	1,020,313		1,066,632
Consolidated Obligations:	'		'
Discount Notes	10,107,866		7,435,940
CO Bonds	27,163,745		26,503,918
Accrued Interest Payable	82,089		80,757
Derivative liability not subject to netting arrangement	377,289		546,958
MRCS	0		0
Level 3 [Member]	'		'
Assets:	'		'
Cash and Due from Banks	0		0
Interest-Bearing Deposits	0		0
AFS Securities	418,847		469,685
HTM Securities	122,837		160,985
Advances	0		0
Mortgage Loans Held for Portfolio, net	45,740		44,689
Accrued Interest Receivable	0		0
Derivative asset not subject to netting arrangement	0		0
Grantor Trust Assets (included in Other Assets)	0		0
Liabilities:	'		'
Deposits	0		0
Consolidated Obligations:	'		'
Discount Notes	0		0
CO Bonds	0		0
Accrued Interest Payable	0		0
Derivative liability not subject to netting arrangement	0		0
MRCS	0		0
Fair Value [Member]	'		'
Assets:	'		'
Cash and Due from Banks	4,444,619		3,318,564
Interest-Bearing Deposits	285		485
AFS Securities	3,574,036		3,632,835
HTM Securities	7,190,400		7,244,318
Advances	19,384,314		17,428,710
Mortgage Loans Held for Portfolio, net	6,678,052		6,272,905
Accrued Interest Receivable	79,329		79,072
Derivative Asset, net	18,989		7,214
Grantor Trust Assets (included in Other Assets)	12,906		12,483
Liabilities:	'		'
Deposits	1,020,313		1,066,632
Consolidated Obligations:	'		'
Discount Notes	10,107,866		7,435,940
CO Bonds	27,163,745		26,503,918
Accrued Interest Payable	82,089		80,757
Derivative Liabilities, net (Note 9)	92,009		109,744
MRCS	16,137		16,787
Carrying Value [Member]	'		'
Assets:	'		'
Cash and Due from Banks	4,444,619		3,318,564
Interest-Bearing Deposits	285		485
AFS Securities	3,574,036		3,632,835
HTM Securities	7,072,395		7,146,250
Advances	19,324,702		17,337,418
Mortgage Loans Held for Portfolio, net	6,471,714		6,189,804
Accrued Interest Receivable	79,329		79,072
Derivative Asset, net	18,989		7,214
Grantor Trust Assets (included in Other Assets)	12,906		12,483
Liabilities:	'		'
Deposits	1,020,313		1,066,632
Consolidated Obligations:	'		'
Discount Notes	10,105,640		7,434,890
CO Bonds	26,914,095		26,583,925
Accrued Interest Payable	82,089		80,757
Derivative Liabilities, net (Note 9)	92,009		109,744
MRCS	$16,137		$16,787
[1]	Represents the application of the netting requirements that allow us to settle (i) positive and negative positions and (ii) cash collateral and related accrued interest held or placed, with the same clearing agent and/or counterparty.

Estimated_Fair_Values_Estimate

Estimated Fair Values (Estimated Fair Value on a Recurring Basis) (Details) (USD $)

Sep. 30, 2014

Dec. 31, 2013

Apr. 04, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

In Thousands, unless otherwise specified

Private-Label RMBS [Member]

Level 1 [Member]

Level 1 [Member]

Level 2 [Member]

Level 2 [Member]

Level 3 [Member]

Level 3 [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Forward Contracts [Member]

Forward Contracts [Member]

Forward Contracts [Member]

Forward Contracts [Member]

Forward Contracts [Member]

Forward Contracts [Member]

Forward Contracts [Member]

Forward Contracts [Member]

Security

Interest Rate Contract [Member]

Interest Rate Contract [Member]

Mortgage Delivery Commitments [Member]

Mortgage Delivery Commitments [Member]

GSE and TVA Debentures [Member]

GSE and TVA Debentures [Member]

Private-Label RMBS [Member]

Private-Label RMBS [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Recurring [Member]

Interest Rate Contract [Member]

Interest Rate Contract [Member]

Mortgage Delivery Commitments [Member]

Mortgage Delivery Commitments [Member]

GSE and TVA Debentures [Member]

GSE and TVA Debentures [Member]

Private-Label RMBS [Member]

Private-Label RMBS [Member]

Interest Rate Contract [Member]

Interest Rate Contract [Member]

Mortgage Delivery Commitments [Member]

Mortgage Delivery Commitments [Member]

GSE and TVA Debentures [Member]

GSE and TVA Debentures [Member]

Private-Label RMBS [Member]

Private-Label RMBS [Member]

Interest Rate Contract [Member]

Interest Rate Contract [Member]

Mortgage Delivery Commitments [Member]

Mortgage Delivery Commitments [Member]

GSE and TVA Debentures [Member]

GSE and TVA Debentures [Member]

Private-Label RMBS [Member]

Private-Label RMBS [Member]

Interest Rate Contract [Member]

Interest Rate Contract [Member]

Level 1 [Member]

Level 1 [Member]

Level 2 [Member]

Level 2 [Member]

Level 3 [Member]

Level 3 [Member]

Interest Rate Contract [Member]

Interest Rate Contract [Member]

Interest Rate Contract [Member]

Interest Rate Contract [Member]

Interest Rate Contract [Member]

Interest Rate Contract [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of securities transferred from Level 3 to Level 2

'

'

6

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

AFS Securities:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Estimated Fair Value

$3,574,036

$3,632,835

'

$0

$0

$3,155,189

$3,163,150

$418,847

$469,685

$3,574,036

$3,632,835

'

'

'

'

$3,155,189

$3,163,150

$418,847

$469,685

$0

$0

'

'

'

'

$0

$0

$0

$0

$3,155,189

$3,163,150

'

'

'

'

$3,155,189

$3,163,150

$0

$0

$418,847

$469,685

'

'

'

'

$0

$0

$418,847

$469,685

'

'

'

'

'

'

'

'

Derivative Assets:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative Asset, net

18,989

7,214

'

'

'

'

'

'

'

18,989

7,214

18,663

6,969

250

12

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

76

233

'

'

'

'

'

'

Derivative asset not subject to netting arrangement

88,575

127,826

'

0

0

88,575

127,826

0

0

'

'

'

'

'

'

'

'

'

'

0

0

0

0

0

0

'

'

'

'

88,575

127,826

88,249

127,581

250

12

'

'

'

'

0

0

0

0

0

0

'

'

'

'

'

'

0

0

76

233

0

0

Netting adjustment

-69,586

[1]

-120,612

[1]

'

'

'

'

'

'

'

-69,586

[2]

-120,612

[2]

-69,586

[2]

-120,612

[2]

0

[2]

0

[2]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

[2]

0

[2]

'

'

'

'

'

'

Grantor Trust Assets (included in Other Assets)

'

'

'

12,906

12,483

0

0

0

0

12,906

12,483

'

'

'

'

'

'

'

'

12,906

12,483

'

'

'

'

'

'

'

'

0

0

'

'

'

'

'

'

'

'

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total recurring assets at estimated fair value

'

'

'

'

'

'

'

'

'

3,605,931

3,652,532

'

'

'

'

'

'

'

'

12,906

12,483

'

'

'

'

'

'

'

'

3,243,764

3,290,976

'

'

'

'

'

'

'

'

418,847

469,685

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative Liabilities:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative Liability, net

92,009

109,744

'

'

'

'

'

'

'

92,009

109,744

91,923

109,487

40

246

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

46

11

'

'

'

'

'

'

Derivative liability not subject to netting arrangement

377,289

546,958

'

0

0

377,289

546,958

0

0

'

'

'

'

'

'

'

'

'

'

0

0

0

0

0

0

'

'

'

'

377,289

546,958

377,203

546,701

40

246

'

'

'

'

0

0

0

0

0

0

'

'

'

'

'

'

0

0

46

11

0

0

Netting adjustment

-285,280

[1]

-437,214

[1]

'

'

'

'

'

'

'

-285,280

[2]

-437,214

[2]

-285,280

[2]

-437,214

[2]

0

[2]

0

[2]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

[2]

0

[2]

'

'

'

'

'

'

Total recurring liabilities at estimated fair value

'

'

'

'

'

'

'

'

'

$92,009

$109,744

'

'

'

'

'

'

'

'

$0

$0

'

'

'

'

'

'

'

'

$377,289

$546,958

'

'

'

'

'

'

'

'

$0

$0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

[1]

Represents the application of the netting requirements that allow us to settle (i) positive and negative positions and (ii) cash collateral and related accrued interest held or placed, with the same clearing agent and/or counterparty.

[2]

Represents the application of the netting requirements that allow us to settle positive and negative positions and also cash collateral and related accrued interest held or placed with the same clearing agent and/or counterparty.

Estimated_Fair_Values_Level_3_

Estimated Fair Values (Level 3 Reconciliation) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'	'	'
Net change in fair value not in excess of cumulative non-credit losses in OCI	($46)	($84)	($227)	$35,095
Recurring [Member] | Level 2 [Member] | Private-Label RMBS [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'	'	'
Transfers out	'	'	'	124,179
Recurring [Member] | Level 3 [Member] | Private-Label RMBS [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'	'	'
Balance, beginning of period	442,712	511,952	469,685	640,142
Accretion of credit losses in Interest Income	872	37	1,746	95
Net gains (losses) on changes in fair value in Other Income (Loss)	-42	0	-270	0
Net change in fair value not in excess of cumulative non-credit losses in OCI	-46	-84	-227	12,625
Unrealized gains (losses) in OCI	569	2,474	13,442	16,843
Reclassification of non-credit portion in OCI to Other Income (Loss)	42	0	270	0
Settlements	-25,260	-25,810	-65,799	-56,957
Transfers out	0	0	0	-124,179
Balance, end of period	418,847	488,569	418,847	488,569
Net gains (losses) included in earnings attributable to changes in fair value relating to assets still held at end of period	$830	$37	$1,476	$95

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2014		Dec. 31, 2013
Loss Contingencies [Line Items]	'		'		'
Cash collateral pledged	$219,750		$219,750		$321,423
Gain from litigation settlement	5,532		14,080		'
Loan Origination Commitments [Member]	'		'		'
Loss Contingencies [Line Items]	'		'		'
Off-balance-sheet commitments expire within one year	20,000	[1]	20,000	[1]	'
Off-balance-sheet commitments expire after one year	0		0		'
Off-balance-sheet commitments,Total	20,000	[1]	20,000	[1]	'
Commitments to Invest in Mortgage Loans [Member]	'		'		'
Loss Contingencies [Line Items]	'		'		'
Off-balance-sheet commitments expire within one year	159,004		159,004		'
Off-balance-sheet commitments expire after one year	0		0		'
Off-balance-sheet commitments,Total	159,004		159,004		'
Letter of Credit [Member]	'		'		'
Loss Contingencies [Line Items]	'		'		'
Off-balance-sheet commitments expire within one year	104,450		104,450		'
Off-balance-sheet commitments expire after one year	150,703		150,703		'
Off-balance-sheet commitments,Total	255,153		255,153		'
Commitments to Extend Credit [Member]	'		'		'
Loss Contingencies [Line Items]	'		'		'
Off-balance-sheet commitments expire within one year	822,299		822,299		'
Off-balance-sheet commitments expire after one year	0		0		'
Off-balance-sheet commitments,Total	822,299		822,299		'
Federal Home Loan Bank Consolidated Obligations Bonds [Member]	'		'		'
Loss Contingencies [Line Items]	'		'		'
Off-balance-sheet commitments expire within one year	452,750	[2]	452,750	[2]	'
Off-balance-sheet commitments expire after one year	0		0		'
Off-balance-sheet commitments,Total	452,750	[2]	452,750	[2]	'
Maximum [Member]	'		'		'
Loss Contingencies [Line Items]	'		'		'
Commitments to fund additional Advances are generally for periods up	'		'6 months		'
Unsecured Debt [Member] | Interest Rate Swaps [Member]	'		'		'
Loss Contingencies [Line Items]	'		'		'
Off-balance-sheet commitments,Total	$405,000		$405,000		'
[1]	Generally for periods up to six months.
[2]	Includes $405,000 hedged with associated interest-rate swaps.

Transactions_with_Related_Part2

Transactions with Related Parties (Details) (USD $)	3 Months Ended			9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013	Dec. 31, 2013
Related Party Transaction [Line Items]	'		'	'		'	'
Total Advances, par value	$19,175,746		'	$19,175,746		'	$17,131,782
Mortgage Loans Held for Portfolio, UPB	6,349,132		'	6,349,132		'	6,085,433
Mortgage loans purchased	'		'	945,230		1,263,177	'
Service fees	220		225	662		684	'
Flagstar Bank, FSB [Member]	'		'	'		'	'
Related Party Transaction [Line Items]	'		'	'		'	'
Capital Stock, including MRCS, par value	209,737		'	209,737		'	209,737
Capital Stock, including MRCS, % of Total	12.00%		'	12.00%		'	13.00%
Total Advances, par value	150,000		'	150,000		'	988,000
Advances, % of Total	1.00%		'	1.00%		'	6.00%
Mortgage Loans Held for Portfolio, UPB	471,029	[1]	'	471,029	[1]	'	537,426	[1]
Mortgage Loans Held for Portfolio, % of Total	7.00%	[1]	'	7.00%	[1]	'	9.00%	[1]
Net advances to (repayments from)	-881,705		7,598	-838,000		-272,402	'
Directors' Financial Institutions [Member]	'		'	'		'	'
Related Party Transaction [Line Items]	'		'	'		'	'
Capital Stock, including MRCS, par value	51,838		'	51,838		'	40,842
Capital Stock, including MRCS, % of Total	3.00%		'	3.00%		'	3.00%
Total Advances, par value	269,336		'	269,336		'	234,394
Advances, % of Total	1.00%		'	1.00%		'	1.00%
Mortgage Loans Held for Portfolio, UPB	161,719	[2]	'	161,719	[2]	'	82,172	[2]
Mortgage Loans Held for Portfolio, % of Total	3.00%	[2]	'	3.00%	[2]	'	1.00%	[2]
Net advances to (repayments from)	18,178		13,678	-6,558		-108,340	'
Mortgage loans purchased	14,557		8,110	29,212		21,271	'
Related Parties Holding 10% or more of our Capital Stock and MRCS [Member]	'		'	'		'	'
Related Party Transaction [Line Items]	'		'	'		'	'
Capital Stock, including MRCS, par value	209,737		'	209,737		'	209,737
Capital Stock, including MRCS, % of Total	12.00%		'	12.00%		'	13.00%
Total Advances, par value	150,000		'	150,000		'	988,000
Advances, % of Total	1.00%		'	1.00%		'	6.00%
Mortgage Loans Held for Portfolio, UPB	471,029	[1]	'	471,029	[1]	'	537,426	[1]
Mortgage Loans Held for Portfolio, % of Total	7.00%	[1]	'	7.00%	[1]	'	9.00%	[1]
FHLBank of Topeka [Member]	'		'	'		'	'
Related Party Transaction [Line Items]	'		'	'		'	'
Payments for participation interests	0		53,581	11,011		309,477	'
FHLBank of Chicago [Member]	'		'	'		'	'
Related Party Transaction [Line Items]	'		'	'		'	'
Service fees	$73		$68	$223		$160	'
[1]	Represents UPB of mortgage loans purchased from related party.
[2]	Represents UPB of mortgage loans purchased from Directors' Financial Institutions.