Derivative Financial Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Junior subordinated debentures	$ 56,472	$ 43,136
Notional amount	1,524,031	1,481,109
Short term advances and brokered CD's	996,500	1,021,500
Derivative instruments	(14,388)	(59,668)
Customer [Member]
Derivative instruments	114,000	62,800
Bank [Member]
Derivative instruments	114,000	62,800
Customer and Bank [Member]
Derivative instruments	228,000	125,600
Cash Flow Hedging [Member]
Amount reclassified from accumulated other comprehensive loss to interest expense	10,600
Amount to be reclassified from the accumulated comprehensive income (loss) into earnings	10,600
Not Designated as Hedging Instrument [Member]
Notional amount	228,000	143,600
Designated as Hedging Instrument [Member]
Notional amount	299,600	316,100
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Notional amount	996,500	1,021,500
Interest Rate Swap [Member]
Notional amount	299,600	316,100
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member]
Notional amount	113,988	80,779
Derivative instruments	(3,355)	(6,998)
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Notional amount	641,500	1,021,500
Derivative instruments	(9,387)	(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