Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 76,716	$ 81,379
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	(1,500)	6,000
Depreciation and amortization of premises and equipment	13,920	12,354
Net amortization of investment securities premiums	3,288	2,908
Net gains on sales of investment securities	(6,560)	(1,112)
Net increase in loans held for sale	(16,458)	(14,728)
Amortization of intangible assets	236	630
Stock-based compensation	2,838	3,022
Excess tax benefits from stock-based compensation	(63)	(52)
Decrease in accrued interest receivable	625	1,921
Decrease (increase) in other assets	9,818	(3,039)
(Decrease) increase in accrued interest payable	(2,873)	1,429
(Decrease) increase in other liabilities	(2,959)	3,646
Total adjustments	312	12,979
Net cash provided by operating activities	77,028	94,358
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sales of securities available for sale	18,815	15,189
Proceeds from maturities of securities available for sale	205,620	174,619
Purchase of securities available for sale	(346,322)	(60,952)
Decrease (increase) in short-term investments	35,759	(57,357)
Net increase in loans	(147,492)	(74,766)
Net purchases of premises and equipment	(14,687)	(11,501)
Net cash used in investing activities	(248,307)	(14,768)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in demand and savings deposits	205,901	104,390
Net (decrease) increase in time deposits	(67,698)	98,083
Increase (decrease) in short-term borrowings	79,316	(250,322)
Additions to long-term debt	148,099	90,000
Repayments of long-term debt	(154,871)	(5,189)
Net proceeds from issuance of common stock	4,632	4,018
Excess tax benefits from stock-based compensation	63	52
Dividends paid	(30,397)	(30,521)
Acquisition of treasury stock	(19,013)	(49,804)
Net cash provided by (used in) financing activities	166,032	(39,293)
Net (Decrease) Increase in Cash and Due From Banks	(5,247)	40,297
Cash and Due From Banks at Beginning of Period	105,702	218,540
Cash and Due From Banks at End of Period	100,455	258,837
Cash paid during the period for:
Interest	46,373	37,802
Income taxes	$ 11,051	$ 16,407