Condensed Consolidated Statements of Cash Flows (unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net income	$ 10,140	$ 11,820
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,121	1,151
Deferred taxes	(443)	905
Stock-based compensation	191	164
Excess tax benefits of stock-based compensation	6	35
Provision for loan losses	1,345	1,559
Write-downs of other real estate owned and other repossessed assets	874	1,146
Gains on sale of mortgage loans held for sale	(190)	(1,397)
Losses on sales of securities	60	0
Losses on sale of assets, net	14	65
Proceeds from sale of mortgage loans held for sale	8,583	59,723
Funding of mortgage loans held for sale	(9,176)	(37,289)
Amortization of securities premiums and discounts, net	664	1,086
Change in cash surrender value of bank owned life insurance	(356)	(324)
Mortgage servicing rights:
Fair value adjustments	229	69
New servicing assets created	(63)	(357)
Changes in:
Other assets	927	(486)
Other liabilities	699	(5,968)
Net cash provided by operating activities	14,625	31,902
Certificates of deposit in other banks:
Purchase of certificates of deposit	0	(3,984)
Securities available-for-sale (AFS):
Purchase of AFS securities	(168,168)	(109,477)
Proceeds from the sales of AFS securities	112,949	0
Proceeds from prepayments and maturities of AFS securities	19,911	31,637
Change in loans, net	28,250	(15,881)
Purchase of premises and equipment	(250)	(267)
Proceeds from sale of premises and equipment	18	0
Redemption of stock by Federal Home Loan Bank	7,746	0
Additional investment in Federal Reserve Bank stock	(1)	(1)
Proceeds from sale of other real estate and other repossessed assets	1,837	2,347
Additional investment in other real estate and other repossessed assets	0	(5)
Additional investment in bank owned life insurance	0	(7,949)
Net cash provided by (used in) investing activities	2,292	(103,580)
Cash flows from financing activities:
Change in deposits, net	69,115	29,732
Change in repurchase agreements, federal funds purchased, and other short-term borrowings, net	5,847	6,411
Payments on advances from Federal Home Loan Bank	(29)	(42)
Issuance of common stock	290	883
Excess tax benefits of stock-based compensation	(6)	(35)
Dividends paid	(5,086)	(4,887)
Net cash provided by financing activities	70,131	32,062
Net increase (decrease) in cash and cash equivalents	87,048	(39,616)
Cash and cash equivalents at beginning of period	106,641	207,560
Cash and cash equivalents at end of period	193,689	167,944
Supplemental disclosures:
Income taxes paid	4,100	4,500
Interest paid	2,794	3,411
Non-cash activities:
Loans to facilitate the sale of other real estate owned and other repossessed assets	1,415	318
Common stock dividends accrued, paid in subsequent quarter	201	4,900
Real estate acquired in settlement of loans	$ 1,273	$ 2,047