Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Operating Activities:
Net income	$ 37,569	$ 22,942	$ 82,729
Adjustment to reconcile net income to net cash provided by operating activities:
Provision for credit losses	130,081	204,016	117,324
Depreciation and amortization	28,890	29,763	30,797
Deferred taxes	(6,568)	(16,050)	(9,358)
Amortization of intangibles	3,324	3,909	4,957
Amortization of debt securities premium and discount, net	19,176	5,111	5,561
Share-based compensation expense	2,683	2,043	1,335
Security (gains) losses, net	(12,127)	(2,569)	55
Net deferred loan origination expense	(8,357)	(8,948)	(9,813)
Excess tax expense (benefit) from exercise of stock options	50	(44)	(500)
Decrease in interest receivable	9,759	7,626	10,532
Decrease in interest payable	(5,692)	(5,252)	(1,167)
Realized gain on student loans sold	0	0	(3,690)
Proceeds from student loans sold	0	0	159,543
Origination of student loans held for sale	0	0	(33,407)
Realized gain on mortgages sold	(36,968)	(35,087)	(25,089)
Proceeds from mortgages sold	1,262,709	1,462,230	1,565,435
Origination of mortgages held for sale	(1,212,548)	(1,440,206)	(1,542,029)
Increase in bank-owned life insurance	(6,021)	(6,293)	(5,499)
Decrease (increase) in prepaid pension asset	25,056	1,596	(51,322)
Decrease (increase) in prepaid deposit insurance assessments	20,088	17,299	(49,625)
Other, net	5,321	(18,088)	33,256
Net cash provided by operating activities	256,425	223,998	280,025
Investing Activities:
Proceeds from calls and maturities of held-to-maturity securities	135,781	600,231	399,302
Proceeds from calls and maturities of available-for-sale securities	387,105	161,654	133,688
Proceeds from sales of available-for-sale securities	274,807	136,769	0
Purchases of held-to-maturity securities	(151,105)	(1,180,677)	(99,282)
Purchases of available-for-sale securities	(414,269)	(444,321)	(105,027)
Net decrease (increase) in short-term investments	150,000	(75,000)	0
Net decrease (increase) in loans and leases	298,884	193,684	(160,968)
Purchases of premises and equipment	(20,475)	(19,609)	(25,296)
Proceeds from sale of premises and equipment	2,363	486	3,399
Contingency earn-out payment	(1,200)	0	(1,130)
Other, net	(51)	(68)	(65)
Net cash used in investing activities	661,840	(626,851)	144,621
Financing Activities:
Net (decrease) increase in deposits	(534,832)	812,319	965,830
Net decrease in short-term debt and other liabilities	(69,399)	(302,799)	(1,420,072)
Advances of long-term debt	0	0	30,000
Repayment of long-term debt	(75,000)	(33)	(41)
Issuance of common stock	20	420	6,320
Repurchase of common stock	(57)	0	0
Excess tax (benefit) expense from exercise of stock options	(50)	44	500
Cash dividends	(11,689)	(73,457)	(73,335)
Net cash used in financing activities	(691,007)	436,494	(490,798)
(Decrease) increase in Cash and Cash Equivalents	227,258	33,641	(66,152)
Cash and Cash Equivalents at Beginning of Year	272,086	238,445	304,597
Cash and Cash Equivalents at End of Year	$ 499,344	$ 272,086	$ 238,445