Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Operating Activities
Net income	$ 30,049	$ 27,437
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	3,100	6,000
Gains on sales of loans	(1,680)	(4,565)
Proceeds from sales of loans	59,490	134,908
Loans originated for sale	(58,920)	(121,858)
Net gains on sales of other real estate and repossessed assets	(856)	(1,009)
Depreciation of premises and equipment	4,238	4,373
Amortization of intangible assets	1,391	1,994
Gain on sale of investment securities	0	(1,104)
Net amortization of premiums and discounts on investment securities	2,129	1,954
Share-based compensation expense	1,173	1,381
Contributions to defined benefit pension plan	0	(15,000)
Net (increase) decrease in interest receivable and other assets	(1,503)	9,425
Net increase (decrease) in interest payable and other liabilities	754	(2,360)
Net cash provided by operating activities	39,365	41,576
Investment securities – available-for-sale:
Proceeds from sales	0	38,028
Proceeds from maturities, calls and principal reductions	71,919	82,474
Purchases	0	(276,460)
Investment securities – held-to-maturity:
Proceeds from maturities, calls and principal reductions	66,230	38,298
Purchases	(100,862)	(83,137)
Net increase in loans	(260,201)	(179,526)
Proceeds from sales of other real estate and repossessed assets	4,879	8,902
Purchases of premises and equipment and branch bank property, net of disposals	(3,221)	(2,676)
Net cash used in investing activities	(221,256)	(374,097)
Financing Activities
Net increase (decrease) in interest- and noninterest-bearing demand deposits and savings accounts	23,559	(14,620)
Net decrease in time deposits	(53,031)	(92,638)
Net increase (decrease) in short-term borrowings	(22,006)	36,532
Repayment of FHLB advances	0	(34,289)
Cash dividends paid	(13,769)	(11,584)
Proceeds from issuance of common stock, net of issuance costs	76,175	0
Proceeds from directors’ stock plans and exercise of stock options, net of shares withheld	1,163	321
Cash paid for payroll taxes upon conversion of restricted stock units	(694)	(379)
Net cash provided by (used in) financing activities	11,397	(116,657)
Net decrease in cash and cash equivalents	(170,494)	(449,178)
Cash and cash equivalents at beginning of period	310,788	656,135
Cash and cash equivalents at end of period	140,294	206,957
Supplemental Disclosure of Cash Flow Information:
Interest paid	7,719	9,528
Loans transferred to other real estate and repossessed assets	4,639	3,083
Closed branch offices transferred to other real estate	0	382
Income Taxes Paid, Net	$ 12,900	$ 5,700