Allowance for Loan Losses - (Summary of Company's Allowance for Loan Losses ("All") and Recorded Investment in Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 37,166	$ 18,873	$ 27,119	$ 17,613
Provision (recoupment) for loan losses			17,076	3,311
Ending balance	40,106	20,241	40,106	20,241
Carrying amount of loan investments					$ 2,738,504	$ 2,587,673	$ 2,328,524
Loans	37,166	18,873	27,119	17,613	40,106	27,119	20,241
Total Loans					2,738,504	2,587,673	2,328,524
Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance	40,106	20,241	40,106	20,241
Loans	40,106	20,241	40,106	20,241	40,106		20,241
Non ASC 310-30 [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	36,951	18,102	26,042	16,892
Charge-offs	(3,686)	(673)	(4,345)	(1,015)
Recoveries	210	197	297	346
Provision (recoupment) for loan losses	6,400	1,850	17,881	3,253
Ending balance	39,875	19,476	39,875	19,476
Ending allowance balance individually evaluated for impairment					14,977		893
Ending allowance balance collectively evaluated for impairment					24,898		18,583
Loans individually evaluated for impairment					45,716		41,241
Loans collectively evaluated for impairment					2,523,506		2,045,988
Carrying amount of loan investments					2,569,222	2,384,843
Loans	36,951	18,102	26,042	16,892	39,875	26,042	19,476
Total Loans					2,569,222	2,384,843
ASC 310-30 [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	215	771	1,077	721
Charge-offs	(41)	(14)	(41)	(14)
Provision (recoupment) for loan losses	57	8	(805)	58
Ending balance	231	765	231	765
Carrying amount of loan investments					169,282	202,830
Loans	215	771	1,077	721	231	1,077	765
Total Loans					169,282	202,830
ASC 310-30 [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance	231	765	231	765
Carrying amount of loan investments					169,282		241,295
Loans	231	765	231	765	231		765
Total Loans					169,282		241,295
Commercial Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	28,684	11,913	17,261	10,384
Ending balance	29,982	12,216	29,982	12,216
Carrying amount of loan investments					1,490,749		1,204,189
Loans	28,684	11,913	17,261	10,384	29,982	17,261	12,216
Total Loans					1,490,749		1,204,189
Commercial Portfolio Segment [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance	29,982	12,216	29,982	12,216
Loans	29,982	12,216	29,982	12,216	29,982		12,216
Commercial Portfolio Segment [Member] | Non ASC 310-30 [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	28,610	11,293	16,473	9,916
Charge-offs	(3,375)	(1)	(3,484)	(51)
Recoveries	12	33	24	54
Provision (recoupment) for loan losses	4,733	259	16,967	1,665
Ending balance	29,980	11,584	29,980	11,584
Ending allowance balance individually evaluated for impairment					14,933		685
Ending allowance balance collectively evaluated for impairment					15,047		10,899
Loans individually evaluated for impairment					37,265		32,940
Loans collectively evaluated for impairment					1,406,609		1,131,346
Loans	28,610	11,293	16,473	9,916	29,980	16,473	11,584
Commercial Portfolio Segment [Member] | ASC 310-30 [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	74	620	788	468
Provision (recoupment) for loan losses	(72)	12	(786)	164
Ending balance	2	632	2	632
Loans	74	620	788	468	2	788	632
Commercial Portfolio Segment [Member] | ASC 310-30 [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance	2	632	2	632
Carrying amount of loan investments					46,875		39,903
Loans	2	632	2	632	2		632
Total Loans					46,875		39,903
Commercial Real Estate Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,861	2,823	4,166	3,042
Ending balance	5,368	2,963	5,368	2,963
Carrying amount of loan investments					525,739		436,857
Loans	3,861	2,823	4,166	3,042	5,368	4,166	2,963
Total Loans					525,739		436,857
Commercial Real Estate Portfolio Segment [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance	5,368	2,963	5,368	2,963
Loans	5,368	2,963	5,368	2,963	5,368		2,963
Commercial Real Estate Portfolio Segment [Member] | Non ASC 310-30 [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,803	2,686	3,939	2,820
Charge-offs		(220)	(276)	(222)
Recoveries	56	109	65	124
Provision (recoupment) for loan losses	1,298	262	1,429	115
Ending balance	5,157	2,837	5,157	2,837
Ending allowance balance individually evaluated for impairment					3		6
Ending allowance balance collectively evaluated for impairment					5,154		2,831
Loans individually evaluated for impairment					842		884
Loans collectively evaluated for impairment					423,178		269,492
Loans	3,803	2,686	3,939	2,820	5,157	3,939	2,837
Commercial Real Estate Portfolio Segment [Member] | ASC 310-30 [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	58	137	227	222
Charge-offs	(41)		(41)
Provision (recoupment) for loan losses	194	(11)	25	(96)
Ending balance	211	126	211	126
Loans	58	137	227	222	211	227	126
Commercial Real Estate Portfolio Segment [Member] | ASC 310-30 [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance	211	126	211	126
Carrying amount of loan investments					101,719		166,481
Loans	211	126	211	126	211		126
Total Loans					101,719		166,481
Residential Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	4,325	3,787	5,281	3,771
Ending balance	4,504	4,649	4,504	4,649
Carrying amount of loan investments					694,171		654,329
Loans	4,325	3,787	5,281	3,771	4,504	5,281	4,649
Total Loans					694,171		654,329
Residential Portfolio Segment [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance	4,504	4,649	4,504	4,649
Loans	4,504	4,649	4,504	4,649	4,504		4,649
Residential Portfolio Segment [Member] | Non ASC 310-30 [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	4,289	3,787	5,245	3,743
Charge-offs	(140)	(95)	(197)	(177)
Recoveries	16		23	30
Provision (recoupment) for loan losses	339	955	(567)	1,051
Ending balance	4,504	4,647	4,504	4,647
Ending allowance balance individually evaluated for impairment					39		202
Ending allowance balance collectively evaluated for impairment					4,465		4,445
Loans individually evaluated for impairment					7,369		7,371
Loans collectively evaluated for impairment					667,461		615,796
Loans	4,289	3,787	5,245	3,743	4,504	5,245	4,647
Residential Portfolio Segment [Member] | ASC 310-30 [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	36		36	28
Provision (recoupment) for loan losses	(36)	2	(36)	(26)
Ending balance		2		2
Loans	36	2	36	28		36	2
Residential Portfolio Segment [Member] | ASC 310-30 [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance		2		2
Carrying amount of loan investments					19,341		31,162
Loans		2		2			2
Total Loans					19,341		31,162
Consumer Loan [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	296	350	411	416
Ending balance	252	413	252	413
Carrying amount of loan investments					27,845		33,149
Loans	296	350	411	416	252	411	413
Total Loans					27,845		33,149
Consumer Loan [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance	252	413	252	413
Loans	252	413	252	413	252		413
Consumer Loan [Member] | Non ASC 310-30 [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	249	336	385	413
Charge-offs	(171)	(357)	(388)	(565)
Recoveries	126	55	185	138
Provision (recoupment) for loan losses	30	374	52	422
Ending balance	234	408	234	408
Ending allowance balance individually evaluated for impairment					2
Ending allowance balance collectively evaluated for impairment					232		408
Loans individually evaluated for impairment					240		46
Loans collectively evaluated for impairment					26,258		29,354
Loans	249	336	385	413	234	385	408
Consumer Loan [Member] | ASC 310-30 [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	47	14	26	3
Charge-offs		(14)		(14)
Provision (recoupment) for loan losses	(29)	5	(8)	16
Ending balance	18	5	18	5
Loans	47	14	26	3	18	$ 26	5
Consumer Loan [Member] | ASC 310-30 [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance	18	5	18	5
Carrying amount of loan investments					1,347		3,749
Loans	$ 18	$ 5	$ 18	$ 5	18		5
Total Loans					$ 1,347		$ 3,749