Parent Company Financial Statements (Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Assets:
Other assets	$ 159,749	$ 100,934
Total assets	5,713,169	5,292,659	$ 5,010,766
Liabilities:
Junior subordinated debentures	22,681	22,681
Other liabilities	152,364	97,279
Total liabilities	5,178,974	4,789,167
Shareholders’ Equity:
Common stock	1,085	1,085
Paid-in capital	125,610	123,281
Retained earnings	418,246	390,363
Accumulated other comprehensive loss	(7,391)	(11,237)
Treasury stock, at cost	(3,355)	0
Total shareholders’ equity	534,195	503,492	$ 448,184	$ 413,284
Total liabilities and shareholders’ equity	5,713,169	5,292,659
Parent Company [Member]
Assets:
Cash on deposit with bank subsidiary	1,658	1,838
Dividends receivable from bank subsidiary	11,836	9,575
Other assets	124	232
Total assets	566,508	535,496
Liabilities:
Junior subordinated debentures	22,681	22,681
Dividends payable	9,592	9,252
Other liabilities	40	71
Total liabilities	32,313	32,004
Shareholders’ Equity:
Common stock	1,085	1,085
Paid-in capital	125,610	123,281
Retained earnings	418,246	390,363
Accumulated other comprehensive loss	(7,391)	(11,237)
Treasury stock, at cost	(3,355)	0
Total shareholders’ equity	534,195	503,492
Total liabilities and shareholders’ equity	566,508	535,496
Bank [Member]
Assets:
Investment in subsidiaries at equity value:	550,986	521,969
Non-bank [Member]
Assets:
Investment in subsidiaries at equity value:	$ 1,904	$ 1,882