Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 3,839	$ 40,159
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	7,199	7,218
Provision for loan losses	60,036	6,154
Loss (gain) on other real estate owned	416	(248)
Deferred tax (benefit) expense	(8,041)	9,252
Increase in cash surrender value of life insurance contracts	(1,208)	(2,596)
Gain on disposal of other assets	(2,111)	(340)
Net (increase) decrease in loans held for sale	(3,308)	356
Net amortization of securities premium/discount	5,799	4,223
Amortization of intangible assets	5,124	6,318
Amortization of FDIC indemnification asset	1,613	1,197
Stock-based compensation expense	4,050	3,071
Decrease in interest payable and other liabilities	(8,565)	(8,577)
Net payments (to) from FDIC for loss share claims	(302)	7,580
Decrease (increase) in FDIC loss share receivable	557	(1,188)
Decrease (increase) in other assets	27,488	(6,826)
Other, net	143	(447)
Net cash provided by operating activities	92,729	65,306
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sales of securities	47,774	9,221
Proceeds from maturities of securities available for sale	86,966	468,358
Purchases of securities available for sale	(167,419)	(638,861)
Proceeds from maturities of securities held to maturity	86,632	88,381
Purchases of securities held to maturity	(236,117)	(207,849)
Net decrease in interest-bearing bank deposits	413,478	286,551
Net decrease in federal funds sold	526	600
Proceeds from sales of loans	61,878
Net increase in loans	(351,202)	(36,137)
Purchases of property and equipment	(1,550)	(8,609)
Proceeds from sales of other real estate	4,316	21,969
Other, net	3,567	(4,582)
Net cash used in investing activities	(51,151)	(20,958)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in deposits	307,254	287,654
Net decrease in short-term borrowings	(322,857)	(396,323)
Repayments of long-term debt	(19,551)	(8,800)
Net proceeds from issuance of long-term debt	66	145,196
Dividends paid	(19,131)	(19,524)
Purchase of common stock under stock buyback program		(75,270)
Other, net	(134)
Net cash provided by financing activities	(54,353)	(67,067)
NET DECREASE IN CASH AND DUE FROM BANKS	(12,775)	(22,719)
CASH AND DUE FROM BANKS, BEGINNING	303,874	356,455
CASH AND DUE FROM BANKS, ENDING	291,099	333,736
SUPPLEMENTAL INFORMATION FOR NON-CASH INVESTING AND FINANCING ACTIVITIES
Assets acquired in settlement of loans	$ 1,662	$ 4,161