Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 141,771	$ 140,934
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Provision for credit losses	11,000	7,800
Depreciation and amortization	38,023	36,738
(Recovery of) addition to valuation allowance on mortgage servicing rights, net	(89)	(14,097)
Amortization of mortgage servicing rights	8,224	12,479
Amortization of other intangible assets	2,972	3,032
Amortization and accretion on earning assets, funding, and other, net	21,647	36,973
Tax impact of stock-based compensation	1,184	448
(Gain) loss on sales of investment securities, net and impairment write-downs	(469)	(582)
(Gain) loss on sales of assets and impairment write-downs, net	(6,561)	(2,726)
Gain on mortgage banking activities, net	(11,668)	(31,539)
Mortgage loans originated and acquired for sale	(777,532)	(1,977,357)
Proceeds from sales of mortgage loans held for sale	735,565	2,152,286
Pension Contributions	(21,270)	(28,000)
(Increase) decrease in interest receivable	(3,301)	739
Increase (decrease) in interest payable	(6,451)	(8,293)
Net change in other assets and other liabilities	(2,333)	42,721
Net cash provided by (used in) operating activities	130,712	371,556
CASH FLOWS FROM INVESTING ACTIVITIES
Net (increase) decrease in loans	(1,292,718)	(233,755)
Purchases of:
Available for sale securities	(808,899)	(1,305,155)
Held to maturity securities	(126,602)	(85,453)
FHLB stock	(7,626)	(28,520)
Premises, equipment, and software, net of disposals	(35,507)	(49,139)
Other assets	(2,460)	(1,401)
Proceeds from:
Sales of available for sale securities	101,987	135,809
Sale of FHLB stock	0	14,399
Prepayments, calls and maturities of available for sale securities	620,606	1,082,290
Prepayments, calls and maturities of held to maturity securities	6,170	0
Prepayments, calls, and maturities of other assets	29,136	30,857
Net cash provided by (used in) investing activities	(1,515,913)	(440,068)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase (decrease) in deposits	934,091	1,398,043
Net increase (decrease) in short-term funding	689,254	(700,059)
Repayment of long-term funding	(155,058)	(400,156)
Purchase of preferred stock	(960)	(617)
Cash dividends on common stock	(43,299)	(40,223)
Cash dividends on preferred stock	(3,777)	(3,885)
Purchase of treasury stock	(162,743)	(93,294)
Net cash provided by (used in) financing activities	1,257,508	159,809
Net increase (decrease) in cash and cash equivalents	(127,693)	91,297
Cash and cash equivalents at beginning of period	602,245	737,873
Cash and cash equivalents at end of period	474,552	829,170
Supplemental disclosures of cash flow information:
Cash paid for interest	46,026	57,310
Cash (received) paid for income taxes	57,167	29,700
Loans and bank premises transferred to other real estate owned	17,125	21,962
Capitalized mortgage servicing rights	$ 5,844	$ 15,968