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	$ 33,487	$ 26,637	$ 25,632
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	10,350	18,125	22,350
Depreciation, amortization and accretion	9,096	7,710	4,798
Deferred income tax (benefit) expense	(285)	(18,116)	(2,498)
Funding of mortgage loans held for sale	(619,526)	(588,454)	(433,845)
Proceeds from sales of mortgage loans held for sale	625,749	594,008	438,212
Gains on sales of mortgage loans held for sale	(11,573)	(12,499)	(4,133)
Gains on sales of securities	(54)	(1,894)	(5,057)
Other-than-temporary-impairment losses on securities	0	0	262
Gains on sales of premises and equipment	58	(39)	(38)
Gain on acquisition	0	0	(9,344)
Stock-based compensation	4,756	1,368	620
Decrease in FDIC loss-share indemnification asset, net of accretion	26,308	62,247	60,110
Decrease in other assets	73,733	84,344	54,186
Increase in other liabilities	1,187	4,273	1,876
Net cash provided by operating activities	153,286	177,710	153,131
Investing activities
Purchases of securities available for sale	(163,146)	(152,873)	(112,761)
Proceeds from sales of securities available for sale	9,015	126,050	86,048
Proceeds from call/maturities of securities available for sale	80,758	134,964	167,191
Purchases of securities held to maturity	(70,075)	(134,511)	(182,277)
Proceeds from sales of securities held to maturity	4,459	0	13,033
Proceeds from call/maturities of securities held to maturity	112,283	148,021	67,204
Net (increase) decrease in loans	(192,399)	(300,686)	(44,333)
Purchases of premises and equipment	(8,050)	(17,588)	(6,333)
Proceeds from sales of premises and equipment	0	309	114
Net cash paid in acquisition	0	(510)	(792)
Net cash received in acquisition	170,005	0	148,443
Net cash (used in) provided by investing activities	(57,150)	(196,824)	135,537
Financing activities
Net increase in noninterest-bearing deposits	652	36,304	153,015
Net increase (decrease) in interest-bearing deposits	54,009	12,680	(431,936)
Net decrease in short-term borrowings	(9,760)	(6,231)	(3,901)
Proceeds from long-term debt	0	3,100	0
Repayment of long-term debt	(8,073)	(86,711)	(72,645)
Cash paid for dividends	(19,303)	(17,117)	(17,071)
Cash received on exercise of stock options	277	548	218
Excess tax (expense) benefits from exercise of stock options	290	(56)	0
Proceeds from equity offering	0	0	0
Net cash used in financing activities	18,092	(57,483)	(372,320)
Net (decrease) increase in cash and cash equivalents	114,228	(76,597)	(83,652)
Cash and cash equivalents at beginning of year	132,420	209,017	292,669
Cash and cash equivalents at end of year	246,648	132,420	209,017
Supplemental disclosures
Cash paid for interest	23,302	26,988	43,000
Cash paid for income taxes	11,391	23,971	9,265
Noncash transactions:
Transfers of loans to other real estate	$ 18,466	$ 48,660	$ 43,513