CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2016
Interest income:
Loans	$ 373,584	$ 363,136
Money market investments	22,285	6,573
Investment securities	57,209	46,286
Total interest income	453,078	415,995
Interest expense:
Deposits	38,688	33,757
Short-term borrowings	2,013	1,095
Long-term debt	19,330	19,045
Total interest expense	60,031	53,897
Net interest income	393,047	362,098
Provision for loan losses	71,063	40,698
Net interest income after provision for loan losses	321,984	321,400
Service charges on deposit accounts	36,455	39,536
Other service fees	60,602	56,175
Mortgage banking activities	12,068	11,369
Net (loss) gain, including impairment, on equity securities	(646)	162
Trading account profit	(198)	(278)
Adjustments (expense) to indemnity reserves on loans sold	(2,926)	(1,966)
FDIC loss share (expense) income	(8,027)	(8,257)
Other operating income	16,169	19,128
Total non-interest income	113,497	115,869
Operating expenses:
Personnel costs	125,852	123,740
Net occupancy expenses	22,802	20,776
Equipment expenses	17,206	15,970
Other taxes	10,902	10,969
Professional Fees	82,985	69,250
Communications	5,906	5,949
Business promotion	12,009	11,576
FDIC deposit insurance	6,920	6,493
Other real estate owned (O R E O) expenses	6,131	12,818
Other operating expenses	28,964	31,432
Amortization of intangibles	2,325	2,345
Total operating expenses	322,002	311,318
Income before income tax	113,479	125,951
Income tax expense	22,155	33,006
Net Income	91,324	92,945
Net income applicable to common stock	$ 90,393	$ 92,014
Net Income per Common Share - Basic	$ 0.89	$ 0.89
Net Income per Common Share - Diluted	0.89	0.89
Dividends Declared per Common Share	$ 0.25	$ 0.25	$ 0.15
Non Covered Under Loss Sharing Agreements with FDIC
Interest expense:
Provision for loan losses	$ 69,333	$ 42,057
Covered Under Loss Sharing Agreements With FDIC Member
Interest expense:
Provision for loan losses	$ 1,730	$ (1,359)