Parent Company Only Financial Information (Condensed Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Assets
Cash and due from banks	$ 60,902	$ 53,263
Due from subsidiary bank	659	140
Total available-for-sale securities	753,013	936,101
Other assets	78,111	60,855
Total assets	4,760,764	4,354,165
Liabilities
Accrued expenses and other liabilities	90,803	68,260
Total liabilities	4,185,091	3,759,772
Common stockholders' equity	575,673	594,393	$ 520,140	$ 458,592
Total liabilities and stockholders' equity	4,760,764	4,354,165
Bank
Assets
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	561,870	573,429
Non-Bank
Assets
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	11,771	9,418
Holding Company
Assets
Cash and due from banks	50	50
Interest-bearing deposits in subsidiary bank	14,313	20,094
Other investment securities	225	237
Other assets	3,546	3,067
Total assets	592,434	606,435
Liabilities
Accrued expenses and other liabilities	6,253	1,955
Dividends payable	602	342
Junior subordinated debt securities	9,906	9,745
Total liabilities	16,761	12,042
Common stockholders' equity	575,673	594,393
Total liabilities and stockholders' equity	$ 592,434	$ 606,435