Derivative Financial Instruments (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) derivative	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Junior subordinated debentures	$ 48,622		$ 47,850
Notional amount, Assets	2,094,770		1,619,026
Short term advances and brokered CD's	826,800
Customer [Member]
Derivative instruments			360,500
Bank [Member]
Derivative instruments	240,000		110,600
Customer and Bank [Member]
Derivative instruments	734,400		721,000
Cash Flow Hedging [Member]
Amount reclassified from accumulated other comprehensive loss to interest expense	6,900	$ 4,300
Amount to be reclassified from the accumulated comprehensive income (loss) into earnings	$ 21,500
Number of derivative contracts terminated	7
Net gain	$ 1,700
Income recognized	800	$ 1,400
Gain (loss) on termination of swaps	1,700
Not Designated as Hedging Instrument [Member]
Notional amount, Assets	735,400		722,000
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Notional amount, Assets	825,800
Designated as Hedging Instrument [Member] | Fair Value Hedging [Member]
Amount of hedged item	900,800		902,500
Interest Rate Swap [Member]
Notional amount, Assets	900,800		902,500
Interest Rate Swap [Member] | Customer [Member]
Derivative instruments	367,200
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member]
Notional amount, Assets	368,195		361,486
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Notional amount, Assets	825,750		555,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Fair Value Hedging [Member]
Notional amount, Assets	900,825		702,540
Portfolio Layer Hedges on Closed Portfolio of Securities Available for Sale [Member] | Designated as Hedging Instrument [Member]
Notional amount, Assets	272,523		283,195
Notional amount	200,000
Portfolio Layer Hedges on Closed Portfolio of Loans [Member] | Designated as Hedging Instrument [Member]
Notional amount, Assets	2,541,669		$ 2,590,087
Notional amount	$ 500,000