Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest and dividend income
Loans, including fees	$ 180,761	$ 116,673	$ 51,942
Securities	5,158	2,632	2,736
Dividends and other interest-earning assets	2,220	1,206	353
Total interest and dividend income	188,139	120,511	55,031
Interest expense
Deposits	24,411	16,051	5,960
Federal Home Loan Bank advances	527	269	348
Notes payable and other interest-bearing liabilities	7,924	6,962	2,171
Total interest expense	32,862	23,282	8,479
Net interest income	155,277	97,229	46,552
Provision for loan and lease losses	10,976	7,963	5,500
Net interest income after provision for loan and lease losses	144,301	89,266	41,052
Noninterest income
Customer service fees	1,490	1,942	1,883
Loan servicing income	4,199	2,049	92
Income from bank owned life insurance	224	177	253
Net gain (loss) on sale of securities available for sale	1,183	331	(83)
Net gain on sale of loans	19,828	8,700	1,106
Net revenue on mortgage banking activities	95,430	67,890	21,310
Investment Advisory Fees	12,904	377	0
Loan Brokerage Income	8,674	1,356	1
Gain on sale of branches	456	12,104	0
Bargain purchase gain	0	0	11,627
Other income	1,249	1,817	430
Total noninterest income	145,637	96,743	36,619
Noninterest expense
Salaries and employee benefits	162,879	110,687	41,891
Occupancy and equipment	33,443	19,662	7,902
Professional fees	19,247	13,864	7,888
Data processing	5,231	4,710	3,011
Advertising	5,016	4,361	1,046
Regulatory assessments	4,182	2,535	1,519
Loan servicing and foreclosure expense	1,066	905	980
Operating loss on equity investment	689	569	364
Valuation allowance for other real estate owned	32	97	703
Net gain on sales of other real estate owned	(66)	(464)	(464)
Provision for loan repurchases	2,808	2,383	256
Amortization of intangible assets	4,079	2,651	696
Impairment on intangible assets	48	1,061	0
All other expense	25,507	15,649	5,768
Total noninterest expense	264,161	178,670	71,560
Income before income taxes	25,777	7,339	6,111
Income tax (benefit) expense	(4,541)	7,260	115
Net income	30,318	79	5,996
Preferred stock dividends	3,640	2,185	1,359
Net income (loss) available to common stockholders	26,678	(2,106)	4,637
Basic earnings per common share (in usd per share)	$ 0.91	$ (0.14)	$ 0.40
Diluted earnings per common share (in usd per share)	$ 0.91	$ (0.14)	$ 0.40
Class A Common Stock
Noninterest expense
Net income	29,670	75	5,442
Preferred stock dividends	3,562	2,070	1,234
Basic earnings per common share (in usd per share)	$ 0.91	$ (0.14)	$ 0.40
Diluted earnings per common share (in usd per share)	$ 0.91	$ (0.14)	$ 0.40
Class B Common Stock
Noninterest expense
Net income	648	4	554
Preferred stock dividends	$ 78	$ 115	$ 125
Basic earnings per common share (in usd per share)	$ 0.91	$ (0.14)	$ 0.40
Diluted earnings per common share (in usd per share)	$ 0.91	$ (0.14)	$ 0.40