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	$ 69,355	$ 57,731
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization and accretion	16,290	15,446
Provision for loan losses	17,411	15,444
Deferred tax (benefit) expenses	(2,454)	3,936
Net securities gains	(10,237)	(752)
Tax benefit of stock-based compensation	(1,505)	(1,247)
Loans originated for sale	(51,761)	(139,894)
Loans sold	58,659	150,074
Gain on sale of loans	(2,465)	(2,043)
Net change in:
Interest receivable	40	(1,207)
Interest payable	(1,292)	(2,160)
Trading securities	203,178	88,052
Bank owned life insurance	(3,375)	(899)
Other, net	8,705	18,370
Net cash flows provided by operating activities	300,549	200,851
Investing Activities
Net change in loans	(538,144)	(262,589)
Securities available for sale:
Purchases	(526,470)	(211,531)
Sales	150,055	21,919
Maturities	172,295	188,782
Securities held to maturity:
Purchases	(325,989)	(235,392)
Sales		17,429
Maturities	95,152	172,586
Purchase of bank owned life insurance	(4,448)	(10,022)
Withdrawal/surrender of bank owned life insurance	715
Increase in premises and equipment	(8,021)	(1,853)
Net cash received in business combinations	27,058	41,986
Net cash flows used in investing activities	(957,797)	(278,685)
Financing Activities
Demand (non-interest bearing and interest bearing) and savings accounts	451,460	390,867
Time deposits	(122,075)	(173,154)
Short-term borrowings	263,271	(66,920)
Increase in long-term debt	216,736	20,826
Decrease in long-term debt	(24,809)	(56,479)
Decrease in junior subordinated debt	(34,022)	(15,000)
Net proceeds from issuance of common stock	6,376	1,973
Tax benefit of stock-based compensation	1,505	1,247
Cash dividends paid:
Preferred stock	(4,332)
Common stock	(40,123)	(34,468)
Net cash flows provided by financing activities	713,987	68,892
Net Increase (Decrease) in Cash and Cash Equivalents	56,739	(8,942)
Cash and cash equivalents at beginning of period	213,981	239,044
Cash and Cash Equivalents at End of Period	$ 270,720	$ 230,102