Consolidated Statements of Financial Condition (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
ASSETS
Cash and due from banks	$ 14,364	$ 4,937
Interest-bearing deposits	216,835	105,181
Total cash and cash equivalents	231,199	110,118
Time deposits in financial institutions	1,900	1,846
Securities available for sale, carried at fair value	345,695	170,022
Loans held for sale, carried at fair value	278,749	192,613
Loans held for sale, carried at lower of cost or fair value	908,341	524,120
Loans and leases receivable, net of allowance of $29,480 and $18,805 at December 31, 2014 and 2013, respectively	3,919,642	2,427,306
Federal Home Loan Bank and other bank stock, at cost	42,241	22,600
Servicing rights, net ($13,135 and $13,535 measured at fair value at December 31, 2014 and 2013, respectively)	13,619	13,883
Servicing rights held for sale, carried at fair value	5,947	0
Accrued interest receivable	15,113	10,866
Other real estate owned, net	423	0
Premises, equipment, and capital leases, net	78,685	66,260
Bank-owned life insurance	19,095	18,881
Goodwill	31,591	30,143
Affordable housing fund investment	4,939	5,628
Deferred income tax	16,445	0
Income tax receivable	0	2,995
Other intangible assets, net	25,252	12,152
Other assets	32,695	18,590
Total Assets	5,971,571	3,628,023
LIABILITIES AND STOCKHOLDERS’ EQUITY
Noninterest-bearing deposits	662,295	429,158
Interest-bearing deposits	4,009,536	2,489,486
Total deposits	4,671,831	2,918,644
Advances from Federal Home Loan Bank	633,000	250,000
Notes payable, net	93,569	82,320
Reserve for loss on repurchased loans	8,303	5,427
Income taxes payable	56	0
Accrued expenses and other liabilities	61,223	46,763
Total liabilities	5,467,982	3,303,154
Commitments and contingent liabilities
Additional paid-in capital	422,910	256,306
Retained earnings	29,863	16,981
Treasury stock, at cost (1,639,023 shares and 1,397,817 shares at December 31, 2014 and 2013, respectively)	(29,798)	(27,911)
Accumulated other comprehensive income (loss), net	373	(600)
Total stockholders’ equity	503,589	324,869
Total liabilities and stockholders’ equity	5,971,571	3,628,023
Series A Preferred Stock
LIABILITIES AND STOCKHOLDERS’ EQUITY
Preferred stock	31,934	31,934
Series B Preferred Stock
LIABILITIES AND STOCKHOLDERS’ EQUITY
Preferred stock	10,000	10,000
Series C Preferred Stock
LIABILITIES AND STOCKHOLDERS’ EQUITY
Preferred stock	37,943	37,943
Class A Common Stock
LIABILITIES AND STOCKHOLDERS’ EQUITY
Common stock	358	210
Class B Common Stock
LIABILITIES AND STOCKHOLDERS’ EQUITY
Common stock	$ 6	$ 6