Derivative Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Junior subordinated debentures	$ 47,777		$ 47,777		$ 50,507
Notional amount, Assets	1,907,043		1,907,043		1,084,955
Short term advances and brokered CD's	922,500		922,500		871,500
Customer [Member]
Derivative instruments	120,400		120,400		110,600
Bank [Member]
Derivative instruments	120,400		120,400		110,600
Customer and Bank [Member]
Derivative instruments	240,700		240,700		221,200
Cash Flow Hedging [Member]
Amount reclassified from accumulated other comprehensive loss to interest expense	6,800	$ 2,400	11,000	$ 5,100
Amount to be reclassified from the accumulated comprehensive income (loss) into earnings			25,500
Not Designated as Hedging Instrument [Member]
Notional amount, Assets	241,700		241,700		221,200
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Notional amount, Assets	921,500		921,500		871,500
Designated as Hedging Instrument [Member] | Fair Value Hedging [Member]
Amount of hedged item	864,200		864,200		273,600
Interest Rate Swap [Member]
Notional amount, Assets	864,200		864,200		273,600
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member]
Notional amount, Assets	121,351		121,351		110,598
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Notional amount, Assets	921,500		921,500		700,750
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Fair Value Hedging [Member]
Notional amount, Assets	864,192		864,192		$ 273,607
Portfolio Layer Hedges on Closed Portfolio of Securities Available for Sale [Member] | Designated as Hedging Instrument [Member]
Notional amount, Assets	294,931		294,931
Notional amount	200,000		200,000
Portfolio Layer Hedges on Closed Portfolio of Loans [Member] | Designated as Hedging Instrument [Member]
Notional amount, Assets	2,651,394		2,651,394
Notional amount	$ 400,000		$ 400,000