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Fair Value Accounting and Measurement (Carrying Amounts and Estimated Fair Values of Selected Financial Instruments) (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Assets |  |
Interest-earning deposits with banks | $ 747,335 | $ 671,300
Debt securities available for sale at fair value | 5,527,371 | 5,910,999
Debt Securities, Held-to-Maturity, Amortized Cost | 2,202,437 | 2,148,327
Debt Securities, Held-to-maturity, Fair Value | 2,038,037 | 2,122,606
Estimate of Fair Value Measurement [Member] |  |
Assets |  |
Cash and due from banks | 225,141 | 153,414
Interest-earning deposits with banks | 747,335 | 671,300
Debt securities available for sale at fair value | 5,527,371 | 5,910,999
Debt Securities, Held-to-maturity, Fair Value | 2,038,037 | 2,122,606
FHLB stock | 10,280 | 10,280
Loans held for sale | 4,271 | 9,774
Loans | 10,746,287 | 10,679,349
Liabilities |  |
Deposits | 412,068 | 430,682
FHLB advances | 8,090 | 8,752
Repurchase agreements | 44,212 | 86,013
Subordinated Debentures | 10,013 | 10,125
Junior subordinated debentures, fair value disclosure | 10,967 | 9,927
Carrying Amount |  |
Assets |  |
Cash and due from banks | 225,141 | 153,414
Interest-earning deposits with banks | 747,335 | 671,300
Debt securities available for sale at fair value | 5,527,371 | 5,910,999
Debt Securities, Held-to-Maturity, Amortized Cost | 2,202,437 | 2,148,327
FHLB stock | 10,280 | 10,280
Loans held for sale | 4,271 | 9,774
Loans | 10,612,735 | 10,486,359
Liabilities |  |
Deposits | 418,395 | 445,957
FHLB advances | 7,345 | 7,359
Repurchase agreements | 44,212 | 86,013
Subordinated Debentures | 10,000 | 10,000
Junior subordinated debentures, fair value disclosure | 10,310 | 10,310
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] |  |
Assets |  |
Cash and due from banks | 225,141 | 153,414
Interest-earning deposits with banks | 747,335 | 671,300
Debt securities available for sale at fair value | 173,342 | 157,536
Debt Securities, Held-to-maturity, Fair Value | 0 | 0
FHLB stock | 0 | 0
Loans held for sale | 0 | 0
Loans | 0 | 0
Liabilities |  |
Deposits | 0 | 0
FHLB advances | 0 | 0
Repurchase agreements | 0 | 0
Subordinated Debentures | 0 | 0
Junior subordinated debentures, fair value disclosure | 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 at fair value | 5,354,029 | 5,753,463
Debt Securities, Held-to-maturity, Fair Value | 2,038,037 | 2,122,606
FHLB stock | 10,280 | 10,280
Loans held for sale | 4,271 | 9,774
Loans | 0 | 0
Liabilities |  |
Deposits | 412,068 | 430,682
FHLB advances | 8,090 | 8,752
Repurchase agreements | 44,212 | 86,013
Subordinated Debentures | 10,013 | 10,125
Junior subordinated debentures, fair value disclosure | 10,967 | 9,927
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 at fair value | 0 | 0
Debt Securities, Held-to-maturity, Fair Value | 0 | 0
FHLB stock | 0 | 0
Loans held for sale | 0 | 0
Loans | 10,746,287 | 10,679,349
Liabilities |  |
Deposits | 0 | 0
FHLB advances | 0 | 0
Repurchase agreements | 0 | 0
Subordinated Debentures | 0 | 0
Junior subordinated debentures, fair value disclosure | 0 | 0
Interest Rate Swap Contracts | Estimate of Fair Value Measurement [Member] |  |
Assets |  |
Interest rate derivative asset | 16,784 | 24,257
Liabilities |  |
Interest rate derivative liability | 16,784 | 24,257
Interest Rate Swap Contracts | Carrying Amount |  |
Assets |  |
Interest rate derivative asset | 16,784 | 24,257
Liabilities |  |
Interest rate derivative liability | 16,784 | 24,257
Interest Rate Swap Contracts | Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] |  |
Assets |  |
Interest rate derivative asset | 0 | 0
Liabilities |  |
Interest rate derivative liability | 0 | 0
Interest Rate Swap Contracts | Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] |  |
Assets |  |
Interest rate derivative asset | 16,784 | 24,257
Liabilities |  |
Interest rate derivative liability | 16,784 | 24,257
Interest Rate Swap Contracts | Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] |  |
Assets |  |
Interest rate derivative asset | 0 | 0
Liabilities |  |
Interest rate derivative liability | 0 | 0
Interest Rate Lock Commitments Contracts | Estimate of Fair Value Measurement [Member] |  |
Assets |  |
Interest rate derivative asset | 36 | 356
Interest Rate Lock Commitments Contracts | Carrying Amount |  |
Assets |  |
Interest rate derivative asset | 36 | 356
Interest Rate Lock Commitments Contracts | Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] |  |
Assets |  |
Interest rate derivative asset | 0 | 0
Interest Rate Lock Commitments Contracts | Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] |  |
Assets |  |
Interest rate derivative asset | 0 | 0
Interest Rate Lock Commitments Contracts | Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] |  |
Assets |  |
Interest rate derivative asset | 36 | 356
Interest rate Forward Sales Contracts | Estimate of Fair Value Measurement [Member] |  |
Assets |  |
Interest rate derivative asset | 313 |
Liabilities |  |
Interest rate derivative liability |  | 27
Interest rate Forward Sales Contracts | Carrying Amount |  |
Assets |  |
Interest rate derivative asset | 313 |
Liabilities |  |
Interest rate derivative liability |  | 27
Interest rate Forward Sales Contracts | Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] |  |
Assets |  |
Interest rate derivative asset | 0 |
Liabilities |  |
Interest rate derivative liability |  | 0
Interest rate Forward Sales Contracts | Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] |  |
Assets |  |
Interest rate derivative asset | 313 |
Liabilities |  |
Interest rate derivative liability |  | 27
Interest rate Forward Sales Contracts | Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] |  |
Assets |  |
Interest rate derivative asset | $ 0 |
Liabilities |  |
Interest rate derivative liability |  | $ 0

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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=120398452&loc=d3e534808-122878 + Details
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