Parent Company Condensed Financial Information - Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
OPERATING ACTIVITIES
Net Income	$ 135,520	$ 110,343	$ 21,040
Net Cash Provided by Operating Activities	240,434	214,852	51,552
FINANCING ACTIVITIES
Repayment of long term debt	(7,689)	(11,001)	(27,187)
Sale of treasury shares, net	(808)	(630)	(594)
Purchase of treasury shares	(7,637)	0	(12,559)
Cash dividends paid to common shareholders	(46,952)	(44,325)	(43,949)
Net Cash Provided by Financing Activities	(554,053)	464,458	139,493
Net (decrease) increase in cash and cash equivalents	(712,206)	692,549	31,843
Cash and cash equivalents at beginning of year	922,215	229,666	197,823
Cash and Cash Equivalents at End of Year	210,009	922,215	229,666
Parent Company
OPERATING ACTIVITIES
Net Income	135,520	110,343	21,040
Equity in undistributed (earnings) losses of subsidiaries	(78,543)	(52,217)	33,430
Other	1,468	761	1,708
Net Cash Provided by Operating Activities	58,445	58,887	56,178
FINANCING ACTIVITIES
Repayment of long term debt	0	(9,750)	0
Sale of treasury shares, net	(808)	(629)	(594)
Purchase of treasury shares	(7,637)	0	(12,559)
Cash dividends paid to common shareholders	(46,952)	(44,324)	(43,949)
Net Cash Provided by Financing Activities	(55,397)	(54,703)	(57,102)
Net (decrease) increase in cash and cash equivalents	3,048	4,184	(924)
Cash and cash equivalents at beginning of year	10,769	6,585	7,509
Cash and Cash Equivalents at End of Year	$ 13,817	$ 10,769	$ 6,585