Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest income:
Real estate secured loans	$ 176,714	$ 166,700	$ 152,429
Commercial loans	55,347	50,115	40,428
Consumer loans	22,770	23,755	23,644
Securities available for sale and Federal Home Loan Bank stock	23,398	26,475	25,250
Investment securities held to maturity	13,494	12,263	10,987
Deposits, Federal funds sold and other short-term investments	58	53	39
Total interest income	291,781	279,361	252,777
Interest expense:
Deposits	14,521	15,332	18,031
Borrowed funds	27,380	25,140	18,736
Total interest expense	41,901	40,472	36,767
Net interest income	249,880	238,889	216,010
Provision for loan losses	4,350	4,650	5,500
Net interest income after provision for loan losses	245,530	234,239	210,510
Non-interest income:
Fees	26,282	21,925	26,033
Wealth management income	16,838	9,420	8,012
Bank-owned life insurance	5,345	5,633	6,596
Other-than-temporary impairment losses on securities	0	0	(434)
Portion of loss recognized in other comprehensive income (before taxes)	0	0	0
Net impairment losses on securities recognized in earnings	0	0	(434)
Net gain on securities transactions	654	251	996
Other income	6,103	3,939	2,950
Total non-interest income	55,222	41,168	44,153
Non-interest expense:
Compensation and employee benefits	99,689	92,218	83,000
Net occupancy expense	26,032	23,958	20,560
Data processing expense	12,698	13,667	10,550
FDIC Insurance	5,036	4,662	4,678
Advertising and promotion expense	4,226	5,008	3,890
Amortization of intangibles	4,066	2,757	1,624
Other operating expenses	28,842	27,721	24,461
Total non-interest expenses	180,589	169,991	148,763
Income before income tax expense	120,163	105,416	105,900
Income tax expense	36,441	31,785	35,366
Net income	$ 83,722	$ 73,631	$ 70,534
Basic earnings per share (in dollars per share)	$ 1.33	$ 1.22	$ 1.23
Average basic shares outstanding	62,945,669	60,388,398	57,236,909
Diluted earnings per share (in dollars per share)	$ 1.33	$ 1.22	$ 1.23
Average diluted shares outstanding	63,114,718	60,562,070	57,361,443