Loans Loan Balances By Classification (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Loans
Balance	$ 2,224,936	$ 2,072,440
Loan Type
Loans
Balance	2,224,936	2,072,440
Originated Loan | Loan Type
Loans
Balance	1,708,104	1,414,639
Originated Loan | Commercial real estate, construction
Loans
Balance	84,626	63,785
Originated Loan | Commercial real estate
Loans
Balance	616,183	534,969
Originated Loan | Commercial and industrial
Loans
Balance	378,131	288,130
Originated Loan | Residential real estate
Loans
Balance	307,490	288,783
Originated Loan | Home equity lines of credit
Loans
Balance	85,617	74,176
Originated Loan | Consumer, Indirect Loan [Member]
Loans
Balance	252,024	165,320
Originated Loan | Consumer, Other Loan [Member]
Loans
Balance	67,579	61,813
Originated Loan | Consumer, other
Loans
Balance	319,603	227,133
Originated Loan | Deposit account overdrafts
Loans
Balance	1,080	1,448
Acquired Loans | Loan Type
Loans
Balance	516,832	657,801
Acquired Loans | Commercial real estate, construction
Loans
Balance	10,100	12,114
Acquired Loans | Commercial real estate
Loans
Balance	214,566	277,206
Acquired Loans | Commercial and industrial
Loans
Balance	44,208	63,589
Acquired Loans | Residential real estate
Loans
Balance	228,435	276,772
Acquired Loans | Home equity lines of credit
Loans
Balance	25,875	32,253
Acquired Loans | Consumer, Indirect Loan [Member]
Loans
Balance	808	1,776
Acquired Loans | Consumer, Other Loan [Member]
Loans
Balance	2,940	6,205
Acquired Loans | Consumer, other
Loans
Balance	$ 3,748	$ 7,981