Parent Company Only Financial Information (Condensed Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Assets
Cash and due from banks	$ 58,129	$ 53,663
Due from subsidiary bank	3,255	3,875
Total available-for-sale securities	777,940	784,701
Other assets	36,359	34,496
Total assets	3,432,348	3,258,970
Liabilities
Accrued expenses and other liabilities	36,603	29,181
Dividends payable	165	103
Long-term borrowings	145,155	113,670
Junior subordinated debt securities	6,924	6,736
Total liabilities	2,997,087	2,839,181
Common stockholders' equity	435,261	419,789	$ 340,118	$ 221,553
Total liabilities and stockholders' equity	3,432,348	3,258,970
Bank
Assets
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	395,468	385,258
Non-Bank
Assets
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	28,730	29,155
Holding Company
Assets
Cash and due from banks	50	50
Interest-bearing deposits in subsidiary bank	7,988	4,437
Total available-for-sale securities	8,109	5,813
Other assets	1,649	1,070
Total assets	445,249	429,658
Liabilities
Accrued expenses and other liabilities	2,589	3,030
Junior subordinated debt securities	7,234	6,736
Total liabilities	9,988	9,869
Common stockholders' equity	435,261	419,789
Total liabilities and stockholders' equity	$ 445,249	$ 429,658