Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Operating Activities:
Net income	$ 66,417	$ 67,315
Adjustment to reconcile net income to net cash provided by operating activities:
Provision for credit losses	7,500	22,000
Depreciation and amortization	19,874	20,336
Deferred taxes	(3,002)
Amortization of intangibles	2,151	2,366
Amortization of debt securities premium and discount, net	11,514	9,794
Share-based compensation expense	2,017	2,363
Security gains, net	(17)	(290)
Net deferred loan origination expense	(5,845)	(6,088)
Excess tax benefit from exercise of stock options	68
Decrease in interest receivable	1,322	2,952
Decrease in interest payable	(984)	(1,885)
Realized gain on mortgages sold	(42,343)	(49,030)
Proceeds from mortgages sold	1,301,266	1,448,252
Origination of mortgages held for sale	(1,202,701)	(1,447,087)
Loss on other real estate owned, net	5,325	20,447
Increase in bank-owned life insurance	(5,849)	(3,713)
Decrease in prepaid pension asset	15,175	3,401
Decrease in prepaid deposit insurance assessments		11,086
Other, net	(11,985)	7,377
Net cash provided by operating activities	159,903	109,596
Investing activities:
Proceeds from calls and maturities of available-for-sale securities	408,824	386,658
Proceeds from sales of available-for-sale securities		2,812
Purchases of available-for-sale securities	(617,203)	(348,905)
Net (increase) decrease in loans and leases	(169,671)	124,393
Purchases of premises and equipment	(18,077)	(18,815)
Proceeds from sale of premises and equipment	3,047	1,063
Proceeds from sale of other real estate owned, net	41,617	50,029
Other, net	108	(23)
Net cash (used in) provided by investing activities	(351,355)	197,212
Financing activities:
Net (decrease) increase in deposits	(370,200)	19,452
Net decrease in short-term debt and other liabilities	4,000	2,232
Advances of long-term debt	50,000
Redemption of Junior Subordinated Debt	(128,866)
Issuance of common stock	459	108,733
Excess tax benefit from exercise of stock options	(68)
Payment of cash dividends	(6,622)	(2,833)
Net cash (used in) provided by financing activities	(451,297)	127,584
(Decrease) increase in cash and cash equivalents	(642,749)	434,392
Cash and cash equivalents at beginning of period	1,203,614	499,344
Cash and cash equivalents at end of period	$ 560,865	$ 933,736