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	$ 12,499	$ 11,572
Provision for credit losses	1,934	3,365
Depreciation and amortization	1,119	1,054
Gains on sale of loans	(1,843)	(5,649)
Securities premium amortization, net	861	1,011
Origination of loans held for sale	(98,321)	(387,351)
Proceeds from sale of loans held for sale	120,332	487,225
Net increase in cash surrender value of BOLI	(314)	(94)
Decrease (increase) in deferred income taxes	1,803	(1,533)
Decrease in fair value of other real estate owned	453
Loss on sale of other real estate owned	100
Net gain on sale of investment securities	(8)	(23)
Stock-based compensation expense	892	685
Excess tax benefits from stock-based compensation	(75)	(134)
(Increase) decrease in other assets	(3,411)	823
Decrease in other liabilities	(18,311)	(3,486)
Net cash provided by operating activities	17,710	107,465
Cash Flows From Investing Activities:
(Increase) decrease in interest bearing deposits with other banks and short-term investments	(5)	94
Purchases of available for sale investment securities	(18,564)	(54,783)
Proceeds from maturities of available for sale securities	4,384	12,079
Proceeds from sale/call of available for sale securities	6,487	22,148
Purchases of Federal Reserve and Federal Home Loan Bank stock	(26)	(613)
Proceeds from redemption of federal reserve and federal home loan bank stock	699	153
Net increase in loans	(119,871)	(60,707)
Proceeds from sale of other real estate owned	108
Bank premises and equipment acquired	(1,483)	(1,792)
Net cash used in investing activities	(128,271)	(83,421)
Cash Flows From Financing Activities:
Increase (decrease) in deposits	48,275	(84,387)
Decrease in customer repurchase agreements	(14,034)	(8,674)
Payment of dividends on preferred stock	(141)	(141)
Proceeds from exercise of stock options	250	467
Excess tax benefits from stock-based compensation	75	134
Proceeds from employee stock purchase plan	127	114
Net cash provided by (used in) financing activities	34,552	(92,487)
Net Decrease In Cash and Cash Equivalents	(76,009)	(68,443)
Supplemental Cash Flows Information:
Interest paid	3,022	3,775
Income taxes paid	7,550	5,875
Non-Cash Investing Activities
Transfers from loans to other real estate owned	$ 245	$ 3,900