Federal Home Loan Bank Advances, Collateral, Market Value Of Principal, Percent

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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-Publisher FASB
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Amount before tax of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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No definition available.

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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-Publisher FASB
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This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
-Paragraph 1
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Number of investment positions in available-for-sale investments in a continuous unrealized loss position for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.

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Amount of the collateral pledged in support of federal home loan bank advances outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 45
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Amount after tax of other than temporary impairment loss (OTTI) on investments in available-for-sale and held-to-maturity debt securities, recognized in other comprehensive loss and attributable to parent entity.

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-Publisher FASB
-Name Accounting Standards Codification
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The amount of other than temporary impairment (OTTI) losses on equity securities, OTTI related to credit losses on debt securities, and OTTI losses on debt securities when the entity intends to sell the securities or it is more likely than not that the entity will be required to sell the securities before recovery of its amortized cost basis. Additionally, this item includes OTTI losses recognized during the period on investments accounted for under the cost method of accounting.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Investments (Details) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
Investments (Details) $ in Thousands	Feb. 29, 2016	Sep. 30, 2016 USD ($) security	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) security	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($) security
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		$ 4,609,551		$ 4,609,551		$ 4,689,773
Gross Unrealized Gains		126,254		126,254		41,273
Gross Unrealized Losses		(9,962)		(9,962)		(67,840)
Fair Value		4,725,843		4,725,843		4,663,206
Other-than-temporary impairments				0		0
Federal Home Loan Bank advances, collateral, value of principal, percent (as a percent)	102.00%
FHLB advance collateral		167,400		167,400
Gross accumulated unrealized gain (losses) on available-for-sale securities		$ (10,000)		$ (10,000)		$ (67,800)
Number of securities in unrealized loss position \| security		268		268		303
Net impairment losses recognized in earnings		$ 0	$ 0	$ 0	$ 0
Total debt securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		4,602,457		4,602,457		$ 4,684,148
Gross Unrealized Gains		126,127		126,127		41,235
Gross Unrealized Losses		(9,959)		(9,959)		(67,822)
Fair Value		4,718,625		4,718,625		4,657,561
U.S. Treasury securities and obligations of U.S. government corporations and agencies
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		41,735		41,735		160,393
Gross Unrealized Gains		562		562		2,133
Gross Unrealized Losses		(41)		(41)		(1,942)
Fair Value		42,256		42,256		160,584
Obligations of U.S. states and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		2,046,199		2,046,199		1,766,407
Gross Unrealized Gains		87,592		87,592		33,410
Gross Unrealized Losses		(1,122)		(1,122)		(7,290)
Fair Value		2,132,669		2,132,669		1,792,527
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		1,720,839		1,720,839		2,046,697
Gross Unrealized Gains		33,409		33,409		2,836
Gross Unrealized Losses		(4,379)		(4,379)		(44,770)
Fair Value		1,749,869		1,749,869		2,004,763
Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		79,032		79,032		116,764
Gross Unrealized Gains		182		182		56
Gross Unrealized Losses		(32)		(32)		(203)
Fair Value		79,182		79,182		116,617
Residential mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		245,876		245,876		265,879
Gross Unrealized Gains		616		616		161
Gross Unrealized Losses		(3,056)		(3,056)		(8,392)
Fair Value		243,436		243,436		257,648
Commercial mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		347,630		347,630		237,304
Gross Unrealized Gains		3,563		3,563		162
Gross Unrealized Losses		(980)		(980)		(3,975)
Fair Value		350,213		350,213		233,491
Collateralized loan obligations
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		121,146		121,146		61,345
Gross Unrealized Gains		203		203		3
Gross Unrealized Losses		(349)		(349)		(1,148)
Fair Value		121,000		121,000		60,200
Debt securities issued by foreign sovereign governments
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost						29,359
Gross Unrealized Gains						2,474
Gross Unrealized Losses						(102)
Fair Value						31,731
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		7,094		7,094		5,625
Gross Unrealized Gains		127		127		38
Gross Unrealized Losses		(3)		(3)		(18)
Fair Value		$ 7,218		$ 7,218		$ 5,645