Allowance for Loan and Lease Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Allowance for loan losses [Roll Forward]
Beginning balance	$ 36,329	$ 34,606	$ 36,094	$ 34,447	$ 34,447
Provision charged to expense	1,873	2,319	3,638	4,220	8,650
Losses charged off	(3,302)	(2,284)	(5,767)	(4,920)	(9,870)
Recoveries	797	549	1,732	1,443	2,867
Ending balance	35,697	35,190	35,697	35,190	36,094
Allowance for loan losses ending balance [Abstract]
Individually evaluated for impairment	1,337	1,463	1,337	1,463	2,461
Collectively evaluated for impairment	34,360	33,727	34,360	33,727	33,633
Loans ending balance [Abstract]
Individually evaluated for impairment	53,269	50,173	53,269	50,173	49,888
Collectively evaluated for impairment	2,878,116	2,742,658	2,878,116	2,742,658	2,824,073
Commercial [Member] | Construction [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	1,983	2,864	2,199	2,896	2,896
Provision charged to expense	(534)	(244)	(754)	(278)	(707)
Losses charged off	(16)	(1)	(16)	(2)	(3)
Recoveries	4	3	8	6	13
Ending balance	1,437	2,622	1,437	2,622	2,199
Allowance for loan losses ending balance [Abstract]
Individually evaluated for impairment	287	719	287	719	831
Collectively evaluated for impairment	1,150	1,903	1,150	1,903	1,368
Loans ending balance [Abstract]
Individually evaluated for impairment	6,662	8,711	6,662	8,711	6,263
Collectively evaluated for impairment	62,351	102,507	62,351	102,507	71,757
Commercial [Member] | Real Estate [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	14,798	13,860	14,434	13,618	13,618
Provision charged to expense	664	(346)	1,140	284	2,135
Losses charged off	(1,029)	(493)	(1,186)	(926)	(1,379)
Recoveries	5	1	50	46	60
Ending balance	14,438	13,022	14,438	13,022	14,434
Allowance for loan losses ending balance [Abstract]
Individually evaluated for impairment	720	529	720	529	1,227
Collectively evaluated for impairment	13,718	12,493	13,718	12,493	13,207
Loans ending balance [Abstract]
Individually evaluated for impairment	32,848	32,328	32,848	32,328	33,421
Collectively evaluated for impairment	1,046,481	946,084	1,046,481	946,084	1,019,498
Commercial [Member] | Equipment Lease Financing [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	70	125	79	119	119
Provision charged to expense	24	(12)	15	(6)	(40)
Losses charged off	0	0	0	0	0
Recoveries	0	0	0	0	0
Ending balance	94	113	94	113	79
Allowance for loan losses ending balance [Abstract]
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	94	113	94	113	79
Loans ending balance [Abstract]
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	7,353	9,859	7,353	9,859	8,514
Commercial [Member] | Other [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	4,247	4,125	4,225	4,263	4,263
Provision charged to expense	643	846	972	901	1,338
Losses charged off	(621)	(623)	(1,045)	(1,064)	(1,961)
Recoveries	161	66	278	314	585
Ending balance	4,430	4,414	4,430	4,414	4,225
Allowance for loan losses ending balance [Abstract]
Individually evaluated for impairment	330	215	330	215	403
Collectively evaluated for impairment	4,100	4,199	4,100	4,199	3,822
Loans ending balance [Abstract]
Individually evaluated for impairment	11,998	7,949	11,998	7,949	8,460
Collectively evaluated for impairment	354,975	355,960	354,975	355,960	350,438
Residential [Member] | Construction [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	548	519	550	534	534
Provision charged to expense	132	48	136	123	147
Losses charged off	(123)	0	(131)	(90)	(135)
Recoveries	1	3	3	3	4
Ending balance	558	570	558	570	550
Allowance for loan losses ending balance [Abstract]
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	558	570	558	570	550
Loans ending balance [Abstract]
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	58,973	57,914	58,973	57,914	61,750
Residential [Member] | Real Estate [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	6,497	6,030	6,678	6,094	6,094
Provision charged to expense	16	1,095	110	1,459	1,888
Losses charged off	(171)	(175)	(483)	(613)	(1,421)
Recoveries	30	15	67	25	117
Ending balance	6,372	6,965	6,372	6,965	6,678
Allowance for loan losses ending balance [Abstract]
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	6,372	6,965	6,372	6,965	6,678
Loans ending balance [Abstract]
Individually evaluated for impairment	1,761	1,185	1,761	1,185	1,744
Collectively evaluated for impairment	706,699	706,397	706,699	706,397	706,130
Residential [Member] | Home Equity [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	824	742	839	756	756
Provision charged to expense	4	149	(4)	166	158
Losses charged off	(11)	(25)	(21)	(67)	(129)
Recoveries	2	1	5	12	54
Ending balance	819	867	819	867	839
Allowance for loan losses ending balance [Abstract]
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	819	867	819	867	839
Loans ending balance [Abstract]
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	89,185	88,113	89,185	88,113	89,450
Consumer [Member] | Consumer Direct [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	1,603	1,521	1,594	1,574	1,574
Provision charged to expense	316	222	498	422	891
Losses charged off	(393)	(308)	(689)	(665)	(1,306)
Recoveries	108	106	231	210	435
Ending balance	1,634	1,541	1,634	1,541	1,594
Allowance for loan losses ending balance [Abstract]
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	1,634	1,541	1,634	1,541	1,594
Loans ending balance [Abstract]
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	129,291	121,620	129,291	121,620	126,406
Consumer [Member] | Consumer Indirect [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	5,759	4,820	5,496	4,593	4,593
Provision charged to expense	608	561	1,525	1,149	2,840
Losses charged off	(938)	(659)	(2,196)	(1,493)	(3,536)
Recoveries	486	354	1,090	827	1,599
Ending balance	5,915	5,076	5,915	5,076	5,496
Allowance for loan losses ending balance [Abstract]
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	5,915	5,076	5,915	5,076	5,496
Loans ending balance [Abstract]
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	$ 422,808	$ 354,204	$ 422,808	$ 354,204	$ 390,130