Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest income:
Loans receivable, including fees	$ 182,280	$ 146,388	$ 82,580
Loans held for sale	51,553	30,801	38,140
Investment securities	10,405	10,386	6,314
Other	5,612	2,852	1,122
Total interest income	249,850	190,427	128,156
Interest expense:
Deposits	33,982	24,454	21,020
Other borrowings	6,096	5,342	2,024
FHLB advances	6,743	5,194	1,192
Subordinated debt	6,739	3,514	65
Total interest expense	53,560	38,504	24,301
Net interest income	196,290	151,923	103,855
Provision for loan losses	20,566	14,747	2,236
Net interest income after provision for loan losses	175,724	137,176	101,619
Non-interest income:
Mortgage warehouse transactional fees	10,394	8,233	12,962
Bank-owned life insurance	7,006	3,702	2,482
Gains on sales of loans	4,047	3,125	852
Deposit fees	944	801	675
Mortgage loan and banking income	741	2,048	1,142
Gain (loss) on sale of investment securities	(85)	3,191	1,274
Other	4,670	4,026	3,316
Total non-interest income	27,717	25,126	22,703
Non-interest expense:
Salaries and employee benefits	58,777	46,427	35,493
Professional services	11,042	7,748	5,548
FDIC assessments, taxes, and regulatory fees	10,728	11,812	5,568
Technology, communication and bank operations	10,596	8,798	6,607
Occupancy	8,668	8,068	6,552
Other real estate owned	2,516	3,601	1,365
Advertising and promotion	1,475	1,325	1,274
Loan workout	1,127	1,706	2,245
Loss contingency	0	0	2,000
Other	10,017	9,429	7,372
Total non-interest expense	114,946	98,914	74,024
Income before income tax expense	88,495	63,388	50,298
Income tax expense	29,912	20,174	17,604
Net income	58,583	43,214	32,694
Preferred stock dividend	2,493	0	0
Net income available to common shareholders	$ 56,090	$ 43,214	$ 32,694
Basic earnings per common share (usd per share)	$ 2.09	$ 1.62	$ 1.34
Diluted earnings per common share (usd per share)	$ 1.96	$ 1.55	$ 1.30