Parent Company Financial Statements (Balance Sheets - Parent Company) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Assets
Cash and cash equivalents	$ 364,112		$ 103,930
Income tax benefit	3,293		1,217
Total assets	2,541,696		1,584,899
Liabilities
Subordinated notes	44,457		44,440
Total liabilities	2,361,437		1,414,196
Shareholders' equity	180,259	$ 175,768	170,703	$ 162,867	$ 156,119	$ 151,760
Total liabilities and shareholders' equity	2,541,696		1,584,899
Parent Company
Assets
Cash and cash equivalents	806		35,210
Investment in banking subsidiary	221,792		178,240
Investment in captive insurance subsidiary	2,225		1,668
Income tax benefit	441		520
Interest receivable and other assets	79		99
Total assets	225,343		215,737
Liabilities
Subordinated notes	44,457		44,440
Accrued expenses and other liabilities	627		594
Total liabilities	45,084		45,034
Shareholders' equity	180,259		170,703
Total liabilities and shareholders' equity	$ 225,343		$ 215,737