CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating activities
Net income	$ 40,911	$ 28,940	$ 19,440
Adjustments to reconcile net income to net cash provided by operating activities:
Noncontrolling interest		(510)	(308)
Deferred tax benefit	(19,937)	(7,565)	(5,407)
Amortization of tax credit investments	8,639	4,808	2,868
Net discount accretion or premium amortization	2,633	4,245	2,463
Gain on sale of investment securities	(316)	(4,324)	(485)
Gain on sale of other assets	(1,055)	(531)
Write-down of other real estate owned	225	295	1,212
(Gain) loss on sale of fixed assets	(16)	4	147
Proceeds from sale of mortgage loans held for sale	96,677	62,014	46,150
Mortgage loans originated and held for sale	(77,394)	(82,067)	(46,273)
Gain on sale of loans	(835)	(603)	(779)
Provision for loan losses	9,800	11,035	8,010
Depreciation and amortization	2,963	3,351	1,932
Share-based and other compensation expense	2,124	1,102	715
Increase in cash surrender value of bank-owned life insurance	(681)	(750)	(621)
Decrease (increase) in receivables from sales of investments	16,909	(16,909)
Changes in operating assets and liabilities:
Change in other assets	(5,168)	1,540	(6,854)
Change in accrued interest receivable	(2,266)	(1,346)	(1,072)
Change in accrued interest payable	1,125	725	8
Change in other liabilities	15,125	(2,758)	7,224
Net cash provided by (used in) operating activities	89,463	1,198	28,678
Investing activities
Purchases of available for sale investment securities	(132,123)	(344,093)	(445,816)
Proceeds from sales of available for sale investment securities	45,791	125,401	156,778
Proceeds from maturities, prepayments, and calls of available for sale investment securities	91,328	129,910	159,434
Proceeds from maturities, prepayments, and calls of held to maturity securities	1,013
Net change in investment in short-term receivables	(165,773)	(70,864)	26,888
Purchase of real estate properties			(228)
Reimbursement of investment in tax credit entities		15,607
Purchases of investments in tax credit entities	(58,930)	(20,606)	(40,597)
Loans originated, net of repayments	(444,592)	(275,177)	(324,618)
Proceeds from sale of bank premises and equipment	324	16	500
Purchases of bank premises and equipment	(7,129)	(18,189)	(4,141)
Purchases of bank-owned life insurance			(10,000)
Proceeds from the sales of acquired assets			28,972
Proceeds from disposition of real estate owned	5,015	3,840
Reimbursement from FDIC related to acquisition			59,687
Net cash received from business combinations			49,582
Net cash used in investing activities	(665,076)	(454,155)	(343,559)
Financing activities
Net change repurchase agreements	39,670	18,311	6,904
Proceeds from borrowings	8,425	41,800	40,000
Repayment of borrowings	(41,910)	(1,625)	(21,220)
Net increase in deposits	461,073	363,846	257,814
Proceeds from sale or distributions to noncontrolling interest in subsidiary			(1)
Proceeds from sale of preferred stock, net of offering costs			58,518
Proceeds from issuance of common stock, net of offering costs	104,332	1,420	30,430
Repayment of preferred stock		(1,644)	(18,685)
Dividends paid	(347)	(510)	(792)
Net cash provided by financing activities	571,243	421,598	352,968
Net change in cash, due from banks, and short-term investments	(4,370)	(31,359)	38,087
Cash, due from banks, and short-term investments at beginning of period	36,012	67,371	29,284
Cash, due from banks, and short-term investments at end of period	31,642	36,012	67,371
Supplemental cash flows information
Cash paid for interest	$ 38,023	$ 32,392	$ 24,812