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Fair Value Accounting and Measurement (Carrying Amounts and Estimated Fair Values of Selected Financial Instruments) (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Assets |  |
Interest-earning deposits with banks | $ 20,144 | $ 17,407
Debt securities available for sale | 3,367,572 | 3,167,448
Estimate of Fair Value Measurement [Member] |  |
Assets |  |
Cash and due from banks | 278,461 | 260,180
Interest-earning deposits with banks | 20,144 | 17,407
Debt securities available for sale | 3,367,572 | 3,167,448
FHLB stock | 29,680 | 25,960
Loans held for sale | 15,036 | 3,849
Loans | 8,895,564 | 8,316,946
Interest rate contracts | 24,045 | 7,033
Interest Rate Cash Flow Hedge Asset at Fair Value | 19,703 |
Liabilities |  |
Deposits | 361,195 | 407,659
FHLB Advances | 493,736 | 400,085
Repurchase agreements | 24,489 | 61,094
Subordinated Debt Obligations, Fair Value Disclosure | 35,255 | 34,897
Interest rate contracts | 25,046 | 7,033
Reported Value Measurement [Member] |  |
Assets |  |
Cash and due from banks | 278,461 | 260,180
Interest-earning deposits with banks | 20,144 | 17,407
Debt securities available for sale | 3,367,572 | 3,167,448
FHLB stock | 29,680 | 25,960
Loans held for sale | 15,036 | 3,849
Loans | 8,673,695 | 8,308,142
Interest rate contracts | 25,045 | 7,033
Interest Rate Cash Flow Hedge Asset at Fair Value | 19,703 |
Liabilities |  |
Deposits | 366,773 | 414,443
FHLB Advances | 492,482 | 399,523
Repurchase agreements | 24,489 | 61,094
Subordinated Debt Obligations, Fair Value Disclosure | 35,323 | 35,462
Interest rate contracts | 25,046 | 7,033
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] |  |
Assets |  |
Cash and due from banks | 278,461 | 260,180
Interest-earning deposits with banks | 20,144 | 17,407
Debt securities available for sale | 250 | 248
FHLB stock | 0 | 0
Loans held for sale | 0 | 0
Loans | 0 | 0
Interest rate contracts | 0 | 0
Interest Rate Cash Flow Hedge Asset at Fair Value | 0 |
Liabilities |  |
Deposits | 0 | 0
FHLB Advances | 0 | 0
Repurchase agreements | 0 | 0
Subordinated Debt Obligations, Fair Value Disclosure | 0 | 0
Interest rate contracts | 0 | 0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] |  |
Assets |  |
Cash and due from banks | 0 | 0
Interest-earning deposits with banks | 0 | 0
Debt securities available for sale | 3,367,322 | 3,167,200
FHLB stock | 29,680 | 25,960
Loans held for sale | 15,036 | 3,849
Loans | 0 | 0
Interest rate contracts | 24,045 | 7,033
Interest Rate Cash Flow Hedge Asset at Fair Value | 19,703 |
Liabilities |  |
Deposits | 361,195 | 407,659
FHLB Advances | 493,736 | 400,085
Repurchase agreements | 24,489 | 61,094
Subordinated Debt Obligations, Fair Value Disclosure | 35,255 | 34,897
Interest rate contracts | 25,046 | 7,033
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] |  |
Assets |  |
Cash and due from banks | 0 | 0
Interest-earning deposits with banks | 0 | 0
Debt securities available for sale | 0 | 0
FHLB stock | 0 | 0
Loans held for sale | 0 | 0
Loans | 8,895,564 | 8,316,946
Interest rate contracts | 0 | 0
Interest Rate Cash Flow Hedge Asset at Fair Value | 0 |
Liabilities |  |
Deposits | 0 | 0
FHLB Advances | 0 | 0
Repurchase agreements | 0 | 0
Subordinated Debt Obligations, Fair Value Disclosure | 0 | 0
Interest rate contracts | $ 0 | $ 0

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- Definition Amount 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 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942338&loc=SL82898722-210454 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26610-111562 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563 + Details
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- Definition For banks and other depository institutions (including Federal Reserve Banks, if applicable): Interest-bearing deposits in other financial institutions for relatively short periods of time including, for example, certificates of deposits, which are presented separately from cash on the balance sheet. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=117340910&loc=d3e59706-112781 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.2) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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