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Derivative Financial Instruments (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Junior subordinated debentures | $ 51,578 |  | $ 51,578 |  | $ 43,136
Notional amount | 1,534,520 |  | 1,534,520 |  | 1,481,109
Short term advances and brokered CD's | 996,500 |  | 996,500 |  | 1,021,500
Derivative instruments | (25,803) |  | (25,803) |  | (59,668)
Customer [Member] |  |  |  |  |
Derivative instruments | 114,800 |  | 114,800 |  | 62,800
Bank [Member] |  |  |  |  |
Derivative instruments | 114,800 |  | 114,800 |  | 62,800
Customer and Bank [Member] |  |  |  |  |
Derivative instruments | 229,700 |  | 229,700 |  | 125,600
Cash Flow Hedging [Member] |  |  |  |  |
Amount reclassified from accumulated other comprehensive loss to interest expense | 2,600 | $ 1,400 | 7,900 | $ 2,100 |
Amount to be reclassified from the accumulated comprehensive income (loss) into earnings |  |  | 10,500 |  |
Not Designated as Hedging Instrument [Member] |  |  |  |  |
Notional amount | 229,700 |  | 229,700 |  | 143,600
Designated as Hedging Instrument [Member] |  |  |  |  |
Notional amount | 308,400 |  | 308,400 |  | 316,100
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] |  |  |  |  |
Notional amount | 996,500 |  | 996,500 |  | 1,021,500
Interest Rate Swap [Member] |  |  |  |  |
Notional amount | 308,400 |  | 308,400 |  | 316,100
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |
Notional amount | 114,835 |  | 114,835 |  | 80,779
Derivative instruments | (3,225) |  | (3,225) |  | (6,998)
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] |  |  |  |  |
Notional amount | 641,500 |  | 641,500 |  | 1,021,500
Derivative instruments | (14,675) |  | $ (14,675) |  | (25,300)
Floating Rate Junior Subordinated Debentures [Member] |  |  |  |  |
Amount of hedged item |  |  |  |  | 18,000
Junior subordinated debentures |  |  |  |  | $ 61,900
Gain (loss) on termination of swaps | $ (4,700) |  |  |  |

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- Definition The amount of short term advances and brokered certificate of deposit. + References No definition available. + Details
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- Definition Nominal or face amount used to calculate payments on the derivative asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959 + Details
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- Definition The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121549185&loc=d3e80845-113994 + Details
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Junior Subordinated Notes, which have a lower priority than senior instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)(a)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: 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(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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