Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash Flows From Operating Activities:
Net Income	$ 25,443	$ 23,247
Provision for credit losses	5,068	5,722
Depreciation and amortization	2,292	2,095
Gains on sale of loans	(2,864)	(10,417)
Securities premium amortization, net	1,721	1,466
Origination of loans held for sale	(221,231)	(683,248)
Proceeds from sale of loans held for sale	230,714	815,821
Net increase in cash surrender value of BOLI	(624)	(189)
Decrease (increase) in deferred income taxes	3,363	(5,755)
Decrease in fair value of other real estate owned	505
Loss on sale of other real estate owned	100	458
Net gain on sale of investment securities	(10)	(23)
Stock-based compensation expense	1,915	1,552
Excess tax benefits from stock-based compensation	(123)	(270)
(Increase) decrease in other assets	(11,380)	1,318
Decrease in other liabilities	(12,705)	(5,290)
Net cash provided by operating activities	22,184	146,487
Cash Flows From Investing Activities:
Decrease in interest bearing deposits with other banks and short-term investments	43	5
Purchases of available for sale investment securities	(26,852)	(91,791)
Proceeds from maturities of available for sale securities	11,956	25,869
Proceeds from sale/call of available for sale securities	17,485	22,148
Purchases of Federal Reserve and Federal Home Loan Bank stock	(53)	(679)
Proceeds from redemption of federal reserve and federal home loan bank stock	699	153
Net increase in loans	(336,985)	(211,384)
Purchases of BOLI		(15,000)
Purchases of annuity		(10,879)
Proceeds from sale of other real estate owned	108	2,350
Bank premises and equipment acquired	(3,194)	(3,355)
Net cash used in investing activities	(336,793)	(282,563)
Cash Flows From Financing Activities:
Increase (decrease) in deposits	142,513	(8,986)
Decrease in customer repurchase agreements	(19,825)	(4,011)
Payment of dividends on preferred stock	(283)	(283)
Proceeds from exercise of stock options	305	757
Excess tax benefits from stock-based compensation	123	270
Payment in lieu of fractional shares		(10)
Proceeds from employee stock purchase plan	298	253
Net cash provided by (used in) financing activities	123,131	(12,010)
Net Decrease In Cash and Cash Equivalents	(191,478)	(148,086)
Cash and Cash Equivalents at Beginning of Period	306,960	339,334
Cash and Cash Equivalents at End of Period	115,482	191,248
Supplemental Cash Flows Information:
Interest paid	5,770	6,638
Income taxes paid	20,200	19,125
Non-Cash Investing Activities
Transfers from loans to other real estate owned	$ 330	$ 9,614