Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flows from Operating Activities
Net income	$ 58,583	$ 43,214	$ 32,694
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Provision for loan losses, net of change to FDIC receivable and clawback liability	20,566	14,747	2,236
Loss contingency	0	0	2,000
Provision for depreciation and amortization	3,998	3,604	3,129
Share-based compensation expense	5,661	5,237	3,368
Deferred taxes	(10,092)	(6,187)	2,210
Net amortization of investment securities premiums and discounts	858	821	475
Loss (gain) on sale of investment securities	85	(3,191)	(1,274)
Gain on sale of mortgages and other loans	(4,479)	(5,344)	(852)
Origination of loans held for sale	(29,925,763)	(18,138,339)	(20,670,866)
Proceeds from the sale of loans held for sale	29,504,104	17,553,196	21,360,465
Increase in FDIC loss sharing receivable net of clawback liability	(2,430)	(2,409)	(1,610)
Amortization (accretion) of fair value discounts	832	(273)	(912)
Net loss on sales of other real estate owned	761	966	732
Valuation and other adjustments to other real estate owned, net of FDIC receivable	992	1,979	839
Earnings on investment in bank-owned life insurance	(7,006)	(3,702)	(2,482)
Increase in accrued interest receivable and other assets	(12,024)	(16,423)	(15,091)
Increase in accrued interest payable and other liabilities	8,706	9,606	6,974
Net Cash (Used in) Provided by Operating Activities	(356,648)	(542,498)	722,035
Cash Flows from Investing Activities
Purchases of investment securities available for sale	(231,703)	(164,940)	(542,110)
Proceeds from maturities, calls and principal repayments on investment securities available for sale	76,331	49,195	25,109
Proceeds from sales of investment securities available for sale	806	213,249	135,193
Net increase in loans	(1,341,133)	(1,814,196)	(1,008,410)
Purchase of loan portfolios	0	(309,927)	(164,033)
Proceeds from sale of loans held for investment	248,060	162,724	11,624
Net purchases of bank-owned life insurance	(15,000)	(30,465)	(45,465)
Proceeds from bank-owned life insurance	3,384	0	0
Net purchases of FHLB, Federal Reserve Bank, and other restricted stock	(8,839)	(39,578)	(12,261)
Reimbursements from the FDIC on loss sharing agreements	3,917	5,446	6,726
Purchases of bank premises and equipment	(2,939)	(1,419)	(3,894)
Proceeds from sales of other real estate owned	8,890	7,991	9,506
Net Cash Used in Investing Activities	(1,258,226)	(1,921,920)	(1,588,015)
Cash Flows from Financing Activities
Net increase in deposits	1,376,985	1,572,648	519,179
Net increase in short-term borrowed funds from the FHLB	(17,700)	633,500	208,500
Net increase in federal funds purchased	70,000	0	0
Proceeds from long-term FHLB borrowings	25,000	265,000	35,000
Proceeds from issuance of long-term debt, net	0	133,142	60,336
Repayment of subordinated debt	0	(2,000)	0
Net proceeds from issuance of preferred stock	55,569	0	0
Preferred stock dividends paid	(2,314)	0	0
Exercise and redemption of warrants	98	6	264
Purchase of treasury stock	0	0	(7,754)
Net proceeds from issuance of common stock	806	77	97,507
Net Cash Provided by Financing Activities	1,508,444	2,602,373	913,032
Net (Decrease) Increase in Cash and Cash Equivalents	(106,430)	137,955	47,052
Cash and Cash Equivalents – Beginning	371,023	233,068	186,016
Cash and Cash Equivalents – Ending	264,593	371,023	233,068
Supplementary Cash Flow Information
Interest paid	51,313	37,580	24,157
Income taxes paid	38,734	29,843	9,815
Non-cash Items:
Transfer of loans to other real estate owned	3,467	14,042	15,003
Transfer of loans from held for investment to held for sale	0	164,681	0
Transfer of loans from held for sale to held for investment	$ 30,365	$ 18,826	$ 0