Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Interest income:
Loans, including fees	$ 74,388	$ 77,176	$ 223,245	$ 222,546
Investment securities:
Taxable	19,630	20,620	60,346	67,760
Tax-exempt	2,561	2,901	7,835	8,423
Other interest income	45	27	151	105
Total interest income	96,624	100,724	291,577	298,834
Interest expense:
Savings deposits	1,173	891	3,333	2,669
Time deposits	2,551	2,807	7,519	8,514
Securities sold under repurchase agreements	5,480	6,041	16,591	18,097
Other borrowings	812	375	2,196	1,219
Junior subordinated deferrable interest debentures	1,159	1,019	3,377	3,088
Total interest expense	11,175	11,133	33,016	33,587
Net interest income	85,449	89,591	258,561	265,247
Provision for probable loan losses	(1,347)	8,832	14,884	18,976
Net interest income after provision for probable loan losses	86,796	80,759	243,677	246,271
Non-interest income:
Service charges on deposit accounts	19,035	20,627	54,999	59,669
Other service charges, commissions and fees
Banking	13,722	11,028	35,056	34,556
Non-banking	1,803	2,091	4,794	5,057
Investment securities transactions, net	(1,345)		(1,705)	(428)
Other investments, net	4,082	4,400	14,699	12,117
Other income	3,233	4,876	10,229	9,029
Total non-interest income	40,530	43,022	118,072	120,000
Non-interest expense:
Employee compensation and benefits	33,908	31,962	95,846	93,364
Occupancy	6,153	7,143	18,225	20,003
Depreciation of bank premises and equipment	6,175	6,240	18,563	18,798
Professional fees	3,661	3,448	10,400	10,715
Deposit insurance assessments	1,332	1,511	4,333	4,441
Net expense, other real estate owned	2,320	1,678	4,575	4,074
Amortization of identified intangible assets	32	161	96	441
Advertising	1,921	1,857	6,345	5,887
Software and software maintenance	3,687	2,740	10,721	7,869
Early termination fee - securities sold under repurchase agreements	1,799	3,510	1,799	3,510
Impairment charges (Total other-than-temporary impairment charges, $353 net of $263, $(26), net of $223, $876 net of $595 and $150, net of $850, included in other comprehensive income)	90	249	281	700
Other	15,589	14,399	45,385	40,990
Total non-interest expense	76,667	74,898	216,569	210,792
Income before income taxes	50,659	48,883	145,180	155,479
Provision for income taxes	14,872	16,864	46,721	53,723
Net income	$ 35,787	$ 32,019	$ 98,459	$ 101,756
Basic earnings per common share:
Weighted average number of shares outstanding (in shares)	65,948,815	66,449,974	65,968,975	66,430,440
Net income (in dollars per share)	$ 0.54	$ 0.48	$ 1.49	$ 1.53
Fully diluted earnings per common share:
Weighted average number of shares outstanding (in shares)	66,291,556	66,661,841	66,189,507	66,633,913
Net income (in dollars per share)	$ 0.54	$ 0.48	$ 1.49	$ 1.53