Allowance for Loan and Lease Losses (Details 4) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Age analysis of past due loans
Past Due	$ 37,999	$ 39,552
Current	5,294,301	4,955,988
Total Loans and Leases	5,332,300	4,995,540
Loans and leases past due greater than 90 days and accruing	8,275	8,690
Nonaccrual Loans and Leases	37,552	19,333
Originated
Age analysis of past due loans
Past Due	24,923	21,042
Current	4,961,000	4,551,846
Total Loans and Leases	4,985,923	4,572,888
Loans and leases past due greater than 90 days and accruing	167	117
Nonaccrual Loans and Leases	33,526	12,259
Acquired
Age analysis of past due loans
Past Due	13,076	18,510
Current	333,301	404,142
Total Loans and Leases	346,377	422,652
Loans and leases past due greater than 90 days and accruing	8,108	8,573
Nonaccrual Loans and Leases	4,026	7,074
Commercial real estate loans
Age analysis of past due loans
Total Loans and Leases	2,883,428	2,664,394
Commercial real estate loans | Originated
Age analysis of past due loans
Past Due	3,618	4,547
Current	2,690,643	2,430,608
Total Loans and Leases	2,694,261	2,435,155
Loans and leases past due greater than 90 days and accruing	0	16
Nonaccrual Loans and Leases	2,948	3,167
Commercial real estate loans | Acquired
Age analysis of past due loans
Past Due	4,626	10,370
Current	184,541	218,869
Total Loans and Leases	189,167	229,239
Loans and leases past due greater than 90 days and accruing	3,974	6,059
Nonaccrual Loans and Leases	158	2,606
Commercial real estate
Age analysis of past due loans
Total Loans and Leases	2,038,477	1,875,592
Commercial real estate | Originated
Age analysis of past due loans
Past Due	3,327	3,879
Current	1,876,836	1,680,669
Total Loans and Leases	1,880,163	1,684,548
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual Loans and Leases	1,530	2,876
Commercial real estate | Acquired
Age analysis of past due loans
Past Due	4,626	9,293
Current	153,688	181,751
Total Loans and Leases	158,314	191,044
Loans and leases past due greater than 90 days and accruing	3,974	4,982
Nonaccrual Loans and Leases	158	2,606
Multi-family mortgage
Age analysis of past due loans
Total Loans and Leases	703,743	658,480
Multi-family mortgage | Originated
Age analysis of past due loans
Past Due	291	16
Current	672,817	620,849
Total Loans and Leases	673,108	620,865
Loans and leases past due greater than 90 days and accruing	0	16
Nonaccrual Loans and Leases	1,418	291
Multi-family mortgage | Acquired
Age analysis of past due loans
Past Due	0	1,077
Current	30,635	36,538
Total Loans and Leases	30,635	37,615
Loans and leases past due greater than 90 days and accruing	0	1,077
Nonaccrual Loans and Leases	0	0
Construction
Age analysis of past due loans
Total Loans and Leases	141,208	130,322
Construction | Originated
Age analysis of past due loans
Past Due	0	652
Current	140,990	129,090
Total Loans and Leases	140,990	129,742
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual Loans and Leases		0
Construction | Acquired
Age analysis of past due loans
Past Due	0	0
Current	218	580
Total Loans and Leases	218	580
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual Loans and Leases	0	0
Commercial loans
Age analysis of past due loans
Total Loans and Leases	1,470,866	1,374,296
Commercial loans | Originated
Age analysis of past due loans
Past Due	18,818	12,701
Current	1,429,829	1,336,761
Total Loans and Leases	1,448,647	1,349,462
Loans and leases past due greater than 90 days and accruing	166	101
Nonaccrual Loans and Leases	28,602	6,196
Commercial loans | Acquired
Age analysis of past due loans
Past Due	2,755	3,341
Current	19,464	21,493
Total Loans and Leases	22,219	24,834
Loans and leases past due greater than 90 days and accruing	334	325
Nonaccrual Loans and Leases	2,101	2,678
Commercial
Age analysis of past due loans
Total Loans and Leases	652,316	592,531
Commercial | Originated
Age analysis of past due loans
Past Due	11,775	7,953
Current	624,883	568,646
Total Loans and Leases	636,658	576,599
Loans and leases past due greater than 90 days and accruing	0	24
Nonaccrual Loans and Leases	21,950	3,586
Commercial | Acquired
Age analysis of past due loans
Past Due	2,747	3,341
Current	12,911	12,591
Total Loans and Leases	15,658	15,932
Loans and leases past due greater than 90 days and accruing	334	325
Nonaccrual Loans and Leases	2,101	2,678
Equipment financing
Age analysis of past due loans
Total Loans and Leases	764,647	721,890
Equipment financing | Originated
Age analysis of past due loans
Past Due	6,982	4,419
Current	751,104	708,569
Total Loans and Leases	758,086	712,988
Loans and leases past due greater than 90 days and accruing	166	77
Nonaccrual Loans and Leases	6,652	2,610
Equipment financing | Acquired
Age analysis of past due loans
Past Due	8	0
Current	6,553	8,902
Total Loans and Leases	6,561	8,902
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual Loans and Leases	0	0
Condominium association
Age analysis of past due loans
Total Loans and Leases	53,903	59,875
Condominium association | Originated
Age analysis of past due loans
Past Due	61	329
Current	53,842	59,546
Total Loans and Leases	53,903	59,875
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual Loans and Leases	0	0
Condominium association | Acquired
Age analysis of past due loans
Total Loans and Leases	0	0
Indirect automobile loans
Age analysis of past due loans
Total Loans and Leases	7,607	13,678
Indirect automobile loans | Originated
Age analysis of past due loans
Past Due	747	1,499
Current	6,860	12,179
Total Loans and Leases	7,607	13,678
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual Loans and Leases	179	675
Indirect automobile loans | Acquired
Age analysis of past due loans
Total Loans and Leases	0	0
Consumer loans
Age analysis of past due loans
Total Loans and Leases	970,399	943,172
Consumer loans | Originated
Age analysis of past due loans
Past Due	1,740	2,295
Current	833,668	772,298
Total Loans and Leases	835,408	774,593
Loans and leases past due greater than 90 days and accruing	1	0
Nonaccrual Loans and Leases	1,797	2,221
Consumer loans | Acquired
Age analysis of past due loans
Past Due	5,695	4,799
Current	129,296	163,780
Total Loans and Leases	134,991	168,579
Loans and leases past due greater than 90 days and accruing	3,800	2,189
Nonaccrual Loans and Leases	1,767	1,790
Residential mortgage
Age analysis of past due loans
Total Loans and Leases	617,065	616,449
Residential mortgage | Originated
Age analysis of past due loans
Past Due	1,309	1,613
Current	539,341	526,233
Total Loans and Leases	540,650	527,846
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual Loans and Leases	1,533	1,873
Residential mortgage | Acquired
Age analysis of past due loans
Past Due	3,985	2,941
Current	72,430	85,662
Total Loans and Leases	76,415	88,603
Loans and leases past due greater than 90 days and accruing	3,628	2,047
Nonaccrual Loans and Leases	216	352
Home equity
Age analysis of past due loans
Total Loans and Leases	340,954	314,553
Home equity | Originated
Age analysis of past due loans
Past Due	381	636
Current	282,123	234,072
Total Loans and Leases	282,504	234,708
Loans and leases past due greater than 90 days and accruing	1	0
Nonaccrual Loans and Leases	229	319
Home equity | Acquired
Age analysis of past due loans
Past Due	1,710	1,858
Current	56,740	77,987
Total Loans and Leases	58,450	79,845
Loans and leases past due greater than 90 days and accruing	172	142
Nonaccrual Loans and Leases	1,551	1,438
Other consumer
Age analysis of past due loans
Total Loans and Leases	12,380	12,170
Other consumer | Originated
Age analysis of past due loans
Past Due	50	46
Current	12,204	11,993
Total Loans and Leases	12,254	12,039
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual Loans and Leases	35	29
Other consumer | Acquired
Age analysis of past due loans
Past Due	0	0
Current	126	131
Total Loans and Leases	126	131
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual Loans and Leases	0	0
31-60 Days
Age analysis of past due loans
Past Due	8,667	14,774
31-60 Days | Originated
Age analysis of past due loans
Past Due	7,316	11,749
31-60 Days | Acquired
Age analysis of past due loans
Past Due	1,351	3,025
31-60 Days | Commercial real estate loans | Originated
Age analysis of past due loans
Past Due	2,386	2,434
31-60 Days | Commercial real estate loans | Acquired
Age analysis of past due loans
Past Due	431	1,336
31-60 Days | Commercial real estate | Originated
Age analysis of past due loans
Past Due	2,386	1,782
31-60 Days | Commercial real estate | Acquired
Age analysis of past due loans
Past Due	431	1,336
31-60 Days | Multi-family mortgage | Originated
Age analysis of past due loans
Past Due	0	0
31-60 Days | Multi-family mortgage | Acquired
Age analysis of past due loans
Past Due	0	0
31-60 Days | Construction | Originated
Age analysis of past due loans
Past Due	0	652
31-60 Days | Construction | Acquired
Age analysis of past due loans
Past Due	0	0
31-60 Days | Commercial loans | Originated
Age analysis of past due loans
Past Due	3,260	6,464
31-60 Days | Commercial loans | Acquired
Age analysis of past due loans
Past Due	10	351
31-60 Days | Commercial | Originated
Age analysis of past due loans
Past Due	1,998	4,578
31-60 Days | Commercial | Acquired
Age analysis of past due loans
Past Due	2	351
31-60 Days | Equipment financing | Originated
Age analysis of past due loans
Past Due	1,201	1,681
31-60 Days | Equipment financing | Acquired
Age analysis of past due loans
Past Due	8	0
31-60 Days | Condominium association | Originated
Age analysis of past due loans
Past Due	61	205
31-60 Days | Indirect automobile loans | Originated
Age analysis of past due loans
Past Due	501	1,058
31-60 Days | Consumer loans | Originated
Age analysis of past due loans
Past Due	1,169	1,793
31-60 Days | Consumer loans | Acquired
Age analysis of past due loans
Past Due	910	1,338
31-60 Days | Residential mortgage | Originated
Age analysis of past due loans
Past Due	1,131	1,384
31-60 Days | Residential mortgage | Acquired
Age analysis of past due loans
Past Due	46	326
31-60 Days | Home equity | Originated
Age analysis of past due loans
Past Due	25	390
31-60 Days | Home equity | Acquired
Age analysis of past due loans
Past Due	864	1,012
31-60 Days | Other consumer | Originated
Age analysis of past due loans
Past Due	13	19
31-60 Days | Other consumer | Acquired
Age analysis of past due loans
Past Due	0	0
61-90 Days
Age analysis of past due loans
Past Due	1,984	3,294
61-90 Days | Originated
Age analysis of past due loans
Past Due	1,256	2,300
61-90 Days | Acquired
Age analysis of past due loans
Past Due	728	994
61-90 Days | Commercial real estate loans | Originated
Age analysis of past due loans
Past Due	139	0
61-90 Days | Commercial real estate loans | Acquired
Age analysis of past due loans
Past Due	148	369
61-90 Days | Commercial real estate | Originated
Age analysis of past due loans
Past Due	139	0
61-90 Days | Commercial real estate | Acquired
Age analysis of past due loans
Past Due	148	369
61-90 Days | Multi-family mortgage | Originated
Age analysis of past due loans
Past Due	0	0
61-90 Days | Multi-family mortgage | Acquired
Age analysis of past due loans
Past Due	0	0
61-90 Days | Construction | Originated
Age analysis of past due loans
Past Due	0	0
61-90 Days | Construction | Acquired
Age analysis of past due loans
Past Due	0	0
61-90 Days | Commercial loans | Originated
Age analysis of past due loans
Past Due	669	1,726
61-90 Days | Commercial loans | Acquired
Age analysis of past due loans
Past Due	310	23
61-90 Days | Commercial | Originated
Age analysis of past due loans
Past Due	301	1,007
61-90 Days | Commercial | Acquired
Age analysis of past due loans
Past Due	310	23
61-90 Days | Equipment financing | Originated
Age analysis of past due loans
Past Due	368	595
61-90 Days | Equipment financing | Acquired
Age analysis of past due loans
Past Due	0	0
61-90 Days | Condominium association | Originated
Age analysis of past due loans
Past Due	0	124
61-90 Days | Indirect automobile loans | Originated
Age analysis of past due loans
Past Due	184	335
61-90 Days | Consumer loans | Originated
Age analysis of past due loans
Past Due	264	239
61-90 Days | Consumer loans | Acquired
Age analysis of past due loans
Past Due	270	602
61-90 Days | Residential mortgage | Originated
Age analysis of past due loans
Past Due	0	0
61-90 Days | Residential mortgage | Acquired
Age analysis of past due loans
Past Due	95	216
61-90 Days | Home equity | Originated
Age analysis of past due loans
Past Due	256	237
61-90 Days | Home equity | Acquired
Age analysis of past due loans
Past Due	175	386
61-90 Days | Other consumer | Originated
Age analysis of past due loans
Past Due	8	2
61-90 Days | Other consumer | Acquired
Age analysis of past due loans
Past Due	0	0
Greater Than 90 Days
Age analysis of past due loans
Past Due	27,348	21,484
Greater Than 90 Days | Originated
Age analysis of past due loans
Past Due	16,351	6,993
Greater Than 90 Days | Acquired
Age analysis of past due loans
Past Due	10,997	14,491
Greater Than 90 Days | Commercial real estate loans | Originated
Age analysis of past due loans
Past Due	1,093	2,113
Greater Than 90 Days | Commercial real estate loans | Acquired
Age analysis of past due loans
Past Due	4,047	8,665
Greater Than 90 Days | Commercial real estate | Originated
Age analysis of past due loans
Past Due	802	2,097
Greater Than 90 Days | Commercial real estate | Acquired
Age analysis of past due loans
Past Due	4,047	7,588
Greater Than 90 Days | Multi-family mortgage | Originated
Age analysis of past due loans
Past Due	291	16
Greater Than 90 Days | Multi-family mortgage | Acquired
Age analysis of past due loans
Past Due	0	1,077
Greater Than 90 Days | Construction | Originated
Age analysis of past due loans
Past Due	0	0
Greater Than 90 Days | Construction | Acquired
Age analysis of past due loans
Past Due	0	0
Greater Than 90 Days | Commercial loans | Originated
Age analysis of past due loans
Past Due	14,889	4,511
Greater Than 90 Days | Commercial loans | Acquired
Age analysis of past due loans
Past Due	2,435	2,967
Greater Than 90 Days | Commercial | Originated
Age analysis of past due loans
Past Due	9,476	2,368
Greater Than 90 Days | Commercial | Acquired
Age analysis of past due loans
Past Due	2,435	2,967
Greater Than 90 Days | Equipment financing | Originated
Age analysis of past due loans
Past Due	5,413	2,143
Greater Than 90 Days | Equipment financing | Acquired
Age analysis of past due loans
Past Due	0	0
Greater Than 90 Days | Condominium association | Originated
Age analysis of past due loans
Past Due	0	0
Greater Than 90 Days | Indirect automobile loans | Originated
Age analysis of past due loans
Past Due	62	106
Greater Than 90 Days | Consumer loans | Originated
Age analysis of past due loans
Past Due	307	263
Greater Than 90 Days | Consumer loans | Acquired
Age analysis of past due loans
Past Due	4,515	2,859
Greater Than 90 Days | Residential mortgage | Originated
Age analysis of past due loans
Past Due	178	229
Greater Than 90 Days | Residential mortgage | Acquired
Age analysis of past due loans
Past Due	3,844	2,399
Greater Than 90 Days | Home equity | Originated
Age analysis of past due loans
Past Due	100	9
Greater Than 90 Days | Home equity | Acquired
Age analysis of past due loans
Past Due	671	460
Greater Than 90 Days | Other consumer | Originated
Age analysis of past due loans
Past Due	29	25
Greater Than 90 Days | Other consumer | Acquired
Age analysis of past due loans
Past Due	$ 0	$ 0