Allowance For Loan 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	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Allowance for loan losses:
Beginning balance	$ 39,714	$ 17,542	$ 32,947	$ 15,605	$ 15,605
Charge-offs	(3,550)	(1,239)	(13,456)	(1,421)	(2,856)
Recoveries	256	1,184	929	1,798	2,334
Provision	11,000	805	27,000	2,310	17,864
Ending balance	47,420	18,292	47,420	18,292	32,947
Collectively evaluated for impairment						$ 20,122	$ 14,840	$ 680
Individually evaluated for impairment						25,866	17,898	17,412
Total allowance for loan losses	39,714	17,542	32,947	15,605	15,605	47,420	32,947	18,292
Loans receivable:
Collectively evaluated for impairment						72,950	44,993	6,795
Individually evaluated for impairment						3,077,160	3,039,502	1,878,027
Total loans held for investment						3,189,436	3,130,669	1,894,742
Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for loan losses:
Purchased credit impaired						1,432	209	200
Loans receivable:
Purchased credit impaired						39,326	46,174	9,920
Commercial & Industrial [Member]
Allowance for loan losses:
Beginning balance	24,731	8,640	23,130	8,145	8,145
Charge-offs	(3,336)	(1,227)	(13,216)	(1,304)	(2,647)
Recoveries	175	1,163	757	1,760	2,185
Provision	9,719	(113)	20,618	(138)	15,447
Ending balance	31,289	8,463	31,289	8,463	23,130
Collectively evaluated for impairment						19,324	14,733	516
Individually evaluated for impairment						11,756	8,352	7,913
Total allowance for loan losses	24,731	8,640	23,130	8,145	8,145	31,289	23,130	8,463
Loans receivable:
Collectively evaluated for impairment						60,631	35,083	3,636
Individually evaluated for impairment						1,059,630	1,157,464	790,545
Total loans held for investment						1,128,541	1,206,452	795,483
Commercial & Industrial [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for loan losses:
Purchased credit impaired						209	45	34
Loans receivable:
Purchased credit impaired						8,280	13,905	1,302
Owner occupied commercial real estate [Member]
Allowance for loan losses:
Beginning balance	2,275	1,308	1,679	974	974
Charge-offs	(177)		(177)
Provision	606	133	1,202	467	705
Ending balance	2,704	1,441	2,704	1,441	1,679
Collectively evaluated for impairment						562
Individually evaluated for impairment						2,124	1,677	1,438
Total allowance for loan losses	2,275	1,308	1,679	974	974	2,704	1,679	1,441
Loans receivable:
Collectively evaluated for impairment						2,138	829	1,429
Individually evaluated for impairment						357,844	345,911	173,978
Total loans held for investment						366,587	353,889	176,453
Owner occupied commercial real estate [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for loan losses:
Purchased credit impaired						18	2	3
Loans receivable:
Purchased credit impaired						6,605	7,149	1,046
Commercial real estate [Member]
Allowance for loan losses:
Beginning balance	7,224	3,866	4,691	2,942	2,942
Recoveries				1	77
Provision	341	425	2,874	1,348	1,672
Ending balance	7,565	4,291	7,565	4,291	4,691
Individually evaluated for impairment						7,540	4,537	4,137
Total allowance for loan losses	7,224	3,866	4,691	2,942	2,942	7,565	4,691	4,291
Loans receivable:
Collectively evaluated for impairment						7,290	6,946	532
Individually evaluated for impairment						1,059,072	884,881	378,808
Total loans held for investment						1,078,434	904,115	383,863
Commercial real estate [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for loan losses:
Purchased credit impaired						25	154	154
Loans receivable:
Purchased credit impaired						12,072	12,288	4,523
Construction, land & land development [Member]
Allowance for loan losses:
Beginning balance	2,868	2,469	2,345	2,633	2,633
Recoveries	47		73		5
Provision	336	366	833	202	(293)
Ending balance	3,251	2,835	3,251	2,835	2,345
Collectively evaluated for impairment							92	103
Individually evaluated for impairment						2,440	2,245	2,723
Total allowance for loan losses	2,868	2,469	2,345	2,633	2,633	3,251	2,345	2,835
Loans receivable:
Collectively evaluated for impairment							472	502
Individually evaluated for impairment						326,580	349,660	289,916
Total loans held for investment						334,925	358,813	290,469
Construction, land & land development [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for loan losses:
Purchased credit impaired						811	8	9
Loans receivable:
Purchased credit impaired						8,345	8,681	51
Residential mortgage [Member]
Allowance for loan losses:
Beginning balance	2,238	1,055	816	645	645
Charge-offs			(6)		(63)
Recoveries	20	6	77	18	36
Provision	282	(171)	1,653	227	198
Ending balance	2,540	890	2,540	890	816
Collectively evaluated for impairment						233	15	59
Individually evaluated for impairment						1,938	801	831
Total allowance for loan losses	2,238	1,055	816	645	645	2,540	816	890
Loans receivable:
Collectively evaluated for impairment						2,781	1,489	545
Individually evaluated for impairment						263,532	287,843	230,483
Total loans held for investment						270,337	293,483	234,026
Residential mortgage [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for loan losses:
Purchased credit impaired						369
Loans receivable:
Purchased credit impaired						4,024	4,151	2,998
Consumer and other [Member]
Allowance for loan losses:
Beginning balance	378	204	286	266	266
Charge-offs	(37)	(12)	(57)	(117)	(146)
Recoveries	14	15	22	19	31
Provision	(284)	165	(180)	204	135
Ending balance	71	372	71	372	286
Collectively evaluated for impairment						3		2
Individually evaluated for impairment						68	286	370
Total allowance for loan losses	$ 378	$ 204	$ 286	$ 266	$ 266	71	286	372
Loans receivable:
Collectively evaluated for impairment						110	174	151
Individually evaluated for impairment						10,502	13,743	14,297
Total loans held for investment						$ 10,612	$ 13,917	$ 14,448