Parent Company Financial Statements (Statements of Condition) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investment in subsidiaries:
Other assets	$ 89,885	$ 43,451
Total assets	4,429,521	4,297,435
LIABILITIES AND SHAREHOLDERS' EQUITY
Accrued interest and other liabilities	80,474	55,621
Shareholders’ equity	473,415	435,825	$ 403,413	$ 391,547
Total liabilities and shareholders’ equity	4,429,521	4,297,435
Parent Company [Member]
ASSETS
Cash	30,561	32,367
Investment in subsidiaries:
Investment in subsidiary	509,149	464,885
Receivable from subsidiary	150	48
Other assets	19,290	15,458
Total assets	559,150	512,758
LIABILITIES AND SHAREHOLDERS' EQUITY
Subordinated debentures	59,080	59,067
Due to subsidiary	33	40
Accrued interest and other liabilities	26,622	17,826
Shareholders’ equity	473,415	435,825
Total liabilities and shareholders’ equity	$ 559,150	$ 512,758