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Investments in unrealized loss on positions guaranteed by US Treasury and sponsored agencies which are not subject to credit risk due to market conditions.

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Yield or cost of retained securitzed GNMA pools from its own origination.

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No definition available.

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Loan pools securitized by GNMA at amortized cost.

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Value of investments securities held for investment transferred to available for sale in noncash transactions.

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No definition available.

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
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-Section 45
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Net gain (loss) resulting from the sales of securitized, pay-through debt securities collateralized by real estate mortgage loans (mortgages).

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-SubTopic 220
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-Paragraph 1
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Amount, before other-than-temporary impairment (OTTI) accretion, of investment in debt securities measured at amortized cost (held-to-maturity).

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No definition available.

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Investment in short-term money-market instruments (such as commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and so forth) which are highly liquid (that is, readily convertible to known amounts of cash) and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify as cash equivalents by definition. Original maturity means an original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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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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No definition available.

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Investment Securities (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jan. 01, 2019	Dec. 31, 2018
Schedule of Available-for-sale Securities [Line Items]
Money market investments	$ 7,485	$ 6,991	$ 7,485	$ 6,991		$ 4,930
Transfer from held-to-maturity securities to available-for-sale securities			424,740	0
Accumulated other comprehensive income, net of tax	(3,686)		(3,686)			(10,963)
Securitized GNMA pools retained, amortized cost	$ 25,700	$ 37,600	$ 25,700	$ 37,600
Securitized GNMA pool retained, yield	3.69%	3.45%	3.69%	3.45%
Investments guaranteed by US treasury and sponsored agencies in unrealized loss on position	$ 556,500		$ 556,500
Gain on sales of mortgaged-backed securities	4,800
Held-to-maturity, Amortized cost						$ 424,740
Carrying value of securities sold	$ 349,700	$ 0	349,726	$ 0
Accounting Standards Update 201712 [Member]
Schedule of Available-for-sale Securities [Line Items]
Accumulated other comprehensive income, net of tax					$ 14,400
Collateralized Mortgage Backed Securities [Member] \| FNMA and FHLMC [Member]
Schedule of Available-for-sale Securities [Line Items]
Carrying value of securities sold			211,549
Collateralized Mortgage Backed Securities [Member] \| Government National Mortgage Association Certificates and Obligations (GNMA) [Member]
Schedule of Available-for-sale Securities [Line Items]
Carrying value of securities sold			$ 138,177