Investments in Debt and Marketable Securities, Asset-backed Securities, Mortgage Portfolio Description, Mortgage Term

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- Definition

percent of held to securities sold paid down

+ References

No definition available.

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- Definition

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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-Publisher FASB
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- Definition

Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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- Definition

Amount of restricted investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 50
-Paragraph 1A
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- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
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- Definition

Amount of investment in debt security measured at amortized cost (held-to-maturity).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-Topic 320
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Amount of gain (loss) on sale of investment in debt security measured at amortized cost (held-to-maturity), including other-than-temporary impairment (OTTI).

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- Definition

The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

+ References

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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 ($)	3 Months Ended	6 Months Ended
Investment Securities (Narrative) (Details) - USD ($)	Jun. 30, 2019	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Schedule of Investments [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%
Available-for-sale Securities, Gross Realized Losses		$ 625,000	$ 2,600,000
Debt securities held-to-maturity, at amortized cost (fair value of $364,560 and $351,422 at June 30, 2019 and December 31, 2018, respectively)	$ 350,375,000	350,375,000		$ 351,808,000
Debt Securities, Held-to-maturity, Sold, Realized Gain (Loss)			$ 291,000
percent of held to securities sold paid down			96.30%
Other than Temporary Impairment Losses, Investments	0	0	$ 0
Available-for-sale Securities, Gross Realized Gains		$ 18,000	60,000
Asset backed securities mortgage portfolio, term		15 years
Debt Securities, Available-for-sale, Amortized Cost	973,923,000	$ 973,923,000		1,028,883,000
Securities sold at a gain [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	51,700,000	51,700,000	245,000,000.0
Securities sold at a gain [Member]
Schedule of Investments [Line Items]
Debt securities held-to-maturity, at amortized cost (fair value of $364,560 and $351,422 at June 30, 2019 and December 31, 2018, respectively)			7,400,000
Debt Securities, Available-for-sale, Amortized Cost	5,300,000	5,300,000	$ 2,000,000.0
U.S. Government Sponsored Entities Asset-Backed Securities [Member]
Schedule of Investments [Line Items]
Debt securities held-to-maturity, at amortized cost (fair value of $364,560 and $351,422 at June 30, 2019 and December 31, 2018, respectively)	46,264,000	46,264,000		46,530,000
Debt Securities, Available-for-sale, Amortized Cost	948,287,000	948,287,000		1,028,883,000
Collateral Pledged [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Restricted	$ 587,000,000	$ 587,000,000		$ 634,000,000