Parent Company Financial Statements (Condensed Statements of Income and Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
EXPENSES
Salaries and Employee Benefits	$ 84,145	$ 68,570	$ 68,112
Professional Fees	6,295	5,009	3,998
Interest Expense	18,342	9,549	19,126
INCOME BEFORE INCOME TAXES AND EQUITY IN UNDISTRIBUTED INCOME OF SUBSIDIARIES	99,176	102,785	75,044
Income Tax Benefit	(17,351)	(18,648)	(12,834)
NET INCOME	81,825	84,137	62,210
Other Comprehensive Income (Loss):
Changes in Unrecognized Loss in Postretirement Benefit Obligation, Net	54	0	0
Parent Company
INCOME
Interest Income	104	109	118
Other Income (Loss)	31	11	25
Total Income	35,135	66,590	41,723
EXPENSES
Salaries and Employee Benefits	535	537	498
Professional Fees	1,989	1,256	564
Occupancy and Equipment Expense	8	10	7
Interest Expense	3,963	2,763	2,907
Other Expenses	1,162	1,200	1,286
Total Expenses	7,657	5,766	5,262
INCOME BEFORE INCOME TAXES AND EQUITY IN UNDISTRIBUTED INCOME OF SUBSIDIARIES	27,478	60,824	36,461
Income Tax Benefit	1,947	1,607	1,922
INCOME BEFORE EQUITY IN UNDISTRIBUTED INCOME OF SUBSIDIARIES	29,425	62,431	38,383
Equity in Undistributed Income of Subsidiaries	52,400	21,706	23,827
NET INCOME	81,825	84,137	62,210
Other Comprehensive Income (Loss):
Changes in Unrealized Gain (Loss) on Securities, Available-for-Sale	(278,976)	(19,891)	20,270
Changes in Unrecognized Loss in Postretirement Benefit Obligation, Net	54	0	0
TOTAL COMPREHENSIVE INCOME (LOSS)	(197,097)	64,246	82,480
Parent Company | Bank
INCOME
Dividends from Subsidiaries	35,000	65,000	40,000
Parent Company | Non-bank
INCOME
Dividends from Subsidiaries	$ 0	$ 1,470	$ 1,580