Derivative Financial Instruments (Rollforward of Amounts in Accumulated Other Comprehensive Income Related to Interest Rate Swaps Designated as Cash Flow Hedges) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Rollforward of AOCI from Cash Flow Hedging Derivatives [Roll Forward]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ (11,300,000)
Interest rate derivatives
Rollforward of AOCI from Cash Flow Hedging Derivatives [Roll Forward]
Unrealized loss at beginning of period	(31,533,000)	$ (17,943,000)
Amount reclassified from accumulated other comprehensive income to interest expense on deposits, other borrowings and junior subordinated debentures	26,883,000	18,471,000
Amount of gain (loss) recognized in other comprehensive income	41,558,000	(32,061,000)
Unrealized gain (loss) at end of period	36,908,000	(31,533,000)	$ (17,943,000)
Interest rate swap terminated | Interest rate derivatives designated as Cash Flow Hedges | Designated as hedging instrument | Interest expense
Rollforward of AOCI from Cash Flow Hedging Derivatives [Roll Forward]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ 0	$ 1,400,000	$ 4,700,000