Parent Company Financial Statements (Statements of Condition) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
ASSETS
Trading assets	$ 2,457	$ 2,488
Premises and equipment, net	23,886	25,727
Investment in subsidiaries:
Other assets	19,561	17,514
Total assets	2,789,853	2,603,829
LIABILITIES AND SHAREHOLDERS' EQUITY
Junior subordinated debentures	44,024	43,922
Accrued interest and other liabilities	35,645	28,817
Shareholders’ equity	245,109	231,096	233,815	218,876
Total liabilities and shareholders’ equity	2,789,853	2,603,829
Parent Company [Member]
ASSETS
Cash	23,259	21,788
Trading assets	2,457	2,488
Premises and equipment, net	0	4,797
Investment in subsidiaries:
Bank subsidiary	266,940	246,213
Other subsidiary	9,450	8,733
Amounts receivable from subsidiaries	25	2,062
Investments in CCTA and UBCT	1,331	1,331
Other assets	8,812	7,278
Total assets	312,274	294,690
LIABILITIES AND SHAREHOLDERS' EQUITY
Amounts due to subsidiaries		5
Junior subordinated debentures	44,024	43,922
Accrued interest and other liabilities	23,141	19,667
Shareholders’ equity	245,109	231,096
Total liabilities and shareholders’ equity	$ 312,274	$ 294,690