Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Operating Activities
Net income	$ 80,474	$ 69,355
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization and accretion	21,871	16,290
Provision for credit losses	17,000	17,411
Deferred tax expense (benefit)	5,789	(2,454)
Net securities gains	(5)	(10,237)
Tax benefit of stock-based compensation	(192)	(1,505)
Loans originated for sale	(195,538)	(51,761)
Loans sold	198,787	58,659
Gain on sale of loans	(3,780)	(2,465)
Net change in:
Interest receivable	(1,593)	40
Interest payable	(492)	(1,292)
Securities classified as trading in business combination and sold		203,178
Bank owned life insurance	(2,524)	(3,375)
Other, net	(14,562)	8,705
Net cash flows provided by operating activities	105,235	300,549
Investing Activities
Net change in loans and leases	(402,216)	(538,144)
Securities available for sale:
Purchases	(242,375)	(526,470)
Sales	33,228	150,055
Maturities	125,270	172,295
Securities held to maturity:
Purchases	(204,591)	(325,989)
Maturities	137,518	95,152
Purchase of bank owned life insurance	(24)	(4,448)
Withdrawal/surrender of bank owned life insurance		715
Increase in premises and equipment	(8,651)	(8,021)
Net cash received in business combinations		27,058
Net cash flows used in investing activities	(561,841)	(957,797)
Financing Activities
Demand (non-interest bearing and interest bearing) and savings accounts	999,376	451,460
Time deposits	(21,510)	(122,075)
Short-term borrowings	(534,076)	263,271
Increase in long-term borrowings	14,654	216,736
Decrease in long-term borrowings	(13,544)	(58,831)
Net proceeds from issuance of common stock	7,772	6,376
Tax benefit of stock-based compensation	192	1,505
Cash dividends paid:
Preferred stock	(4,020)	(4,332)
Common stock	(42,152)	(40,123)
Net cash flows provided by financing activities	406,692	713,987
Net (Decrease) Increase in Cash and Cash Equivalents	(49,914)	56,739
Cash and cash equivalents at beginning of period	287,393	213,981
Cash and Cash Equivalents at End of Period	$ 237,479	$ 270,720