Loans - Credit Quality (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	$ 3,084,495	$ 1,785,001
Purchased Credit Impaired	46,174	14,154
Total loans held for investment	3,130,669	1,799,155
Grade 1 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	7,742	3,692
Grade 2 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	6,348	5,338
Grade 3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	303,930	311,792
Grade 4 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	2,434,857	1,321,507
Grade 5 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	118,878	69,675
Grade 6 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	84,941	46,243
Grade 7 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	88,794	21,910
Grade 8 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	31,656	4,844
Grade 9 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	7,349
Commercial & Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	1,192,547	785,978
Purchased Credit Impaired	13,905	2,432
Total loans held for investment	1,206,452	788,410
Commercial & Industrial [Member] | Grade 1 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	6,464	2,410
Commercial & Industrial [Member] | Grade 2 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	6,348	5,338
Commercial & Industrial [Member] | Grade 3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	189,370	183,109
Commercial & Industrial [Member] | Grade 4 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	798,335	484,214
Commercial & Industrial [Member] | Grade 5 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	48,083	62,783
Commercial & Industrial [Member] | Grade 6 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	46,068	42,995
Commercial & Industrial [Member] | Grade 7 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	63,254	3,341
Commercial & Industrial [Member] | Grade 8 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	27,276	1,788
Commercial & Industrial [Member] | Grade 9 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	7,349
Owner occupied commercial real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	346,740	162,344
Purchased Credit Impaired	7,149	1,248
Total loans held for investment	353,889	163,592
Owner occupied commercial real estate [Member] | Grade 3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	17,996	26,830
Owner occupied commercial real estate [Member] | Grade 4 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	304,827	133,051
Owner occupied commercial real estate [Member] | Grade 5 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	4,696	1,016
Owner occupied commercial real estate [Member] | Grade 6 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	16,114
Owner occupied commercial real estate [Member] | Grade 7 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	2,278	1,273
Owner occupied commercial real estate [Member] | Grade 8 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	829	174
Commerical real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	891,827	331,745
Purchased Credit Impaired	12,288	7,261
Total loans held for investment	904,115	339,006
Commerical real estate [Member] | Grade 1 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	84
Commerical real estate [Member] | Grade 3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	27,851	33,347
Commerical real estate [Member] | Grade 4 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	770,241	283,401
Commerical real estate [Member] | Grade 5 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	49,275	1,935
Commerical real estate [Member] | Grade 6 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	20,246	2,680
Commerical real estate [Member] | Grade 7 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	22,540	9,812
Commerical real estate [Member] | Grade 8 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	1,590	570
Construction, land & land development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	350,132	240,594
Purchased Credit Impaired	8,681	72
Total loans held for investment	358,813	240,666
Construction, land & land development [Member] | Grade 3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	4,973	7,605
Construction, land & land development [Member] | Grade 4 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	328,296	222,209
Construction, land & land development [Member] | Grade 5 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	15,103	3,692
Construction, land & land development [Member] | Grade 6 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	1,288
Construction, land & land development [Member] | Grade 7 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile		6,148
Construction, land & land development [Member] | Grade 8 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	472	940
Residential mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	289,332	253,925
Purchased Credit Impaired	4,151	3,141
Total loans held for investment	293,483	257,066
Residential mortgage [Member] | Grade 1 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	268	285
Residential mortgage [Member] | Grade 3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	63,118	57,945
Residential mortgage [Member] | Grade 4 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	221,463	192,565
Residential mortgage [Member] | Grade 5 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	1,222	99
Residential mortgage [Member] | Grade 6 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	1,109	447
Residential mortgage [Member] | Grade 7 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	663	1,307
Residential mortgage [Member] | Grade 8 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	1,489	1,277
Consumer and other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	13,917	10,415
Total loans held for investment	13,917	10,415
Consumer and other [Member] | Grade 1 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	926	997
Consumer and other [Member] | Grade 3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	622	2,956
Consumer and other [Member] | Grade 4 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	11,695	6,067
Consumer and other [Member] | Grade 5 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	499	150
Consumer and other [Member] | Grade 6 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	116	121
Consumer and other [Member] | Grade 7 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile	$ 59	29
Consumer and other [Member] | Grade 8 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, credit risk profile		$ 95