Allowance for Loan and Lease Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			$ 35,755
Provision (credit)	$ 976	$ 978	1,745	$ 1,833
Ending Balance	37,157		37,157
Originated Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	35,915	31,981	35,598	31,312
Charge-offs	(319)	(464)	(1,069)	(1,025)
Recoveries	518	473	983	831
Provision (credit)	846	978	1,448	1,850
Ending Balance	36,960	32,968	36,960	32,968
Originated Loans and Leases | Commercial and industrial, total
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	10,273	9,291	9,389	10,495
Charge-offs	(2)	(337)	(77)	(451)
Recoveries	54	89	130	107
Provision (credit)	517	(106)	1,400	(1,214)
Ending Balance	10,842	8,937	10,842	8,937
Originated Loans and Leases | Commercial real estate, total
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	19,114	17,108	19,836	15,479
Charge-offs	0	(12)	(21)	(12)
Recoveries	218	210	452	420
Provision (credit)	(211)	923	(1,146)	2,342
Ending Balance	19,121	18,229	19,121	18,229
Originated Loans and Leases | Residential real estate, total
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	5,386	4,275	5,149	4,070
Charge-offs	(68)	0	(441)	(201)
Recoveries	109	15	136	32
Provision (credit)	334	196	917	585
Ending Balance	5,761	4,486	5,761	4,486
Originated Loans and Leases | Consumer and other, total
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,142	1,307	1,224	1,268
Charge-offs	(249)	(115)	(530)	(361)
Recoveries	137	159	265	272
Provision (credit)	206	(35)	277	137
Ending Balance	1,236	1,316	1,236	1,316
Originated Loans and Leases | Finance Leases
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0	0	0	0
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision (credit)	0	0	0	0
Ending Balance	0	0	0	0
Total Acquired Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	251	549	157	692
Charge-offs	(218)	(506)	(300)	(678)
Recoveries	34	114	43	160
Provision (credit)	130	0	297	(17)
Ending Balance	197	157	197	157
Total Acquired Loans | Commercial and industrial, total
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0	433	0	433
Charge-offs	(65)	(324)	(74)	(387)
Recoveries	0	0	0	0
Provision (credit)	115	(62)	124	1
Ending Balance	50	47	50	47
Total Acquired Loans | Commercial real estate, total
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	76	33	97	61
Charge-offs	0	(182)	(73)	(182)
Recoveries	16	114	25	160
Provision (credit)	(5)	100	38	26
Ending Balance	87	65	87	65
Total Acquired Loans | Residential real estate, total
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	169	59	54	198
Charge-offs	(152)	0	(152)	(16)
Recoveries	12	0	12	0
Provision (credit)	25	(36)	140	(159)
Ending Balance	54	23	54	23
Total Acquired Loans | Consumer and other, total
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	6	24	6	0
Charge-offs	(1)	0	(1)	(93)
Recoveries	6	0	6	0
Provision (credit)	(5)	(2)	(5)	115
Ending Balance	6	22	6	22
Total Acquired Loans | Covered Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		0	0	0
Charge-offs		0	0	0
Recoveries		0	0	0
Provision (credit)		0	0	0
Ending Balance	0	$ 0	0	$ 0
Total Acquired Loans | Finance Leases
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0
Charge-offs	0
Recoveries	0
Provision (credit)	0
Ending Balance	$ 0		$ 0