CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Interest income:
Loans receivable	$ 69,373	$ 72,973
Mortgage-backed securities	2,793	3,441
Taxable investment securities	1,080	905
Tax-free investment securities	1,655	2,063
Interest-earning deposits	200	251
Total interest income	75,101	79,633
Interest expense:
Deposits	6,490	7,814
Borrowed funds	7,714	7,831
Total interest expense	14,204	15,645
Net interest income	60,897	63,988
Provision for loan losses	7,485	7,158
Net interest income after provision for loan losses	53,412	56,830
Noninterest income:
Gain on sale of investments, net	3,348	101
Service charges and fees	8,408	8,691
Trust and other financial services income	3,047	2,204
Insurance commission income	2,564	2,295
Loss on real estate owned, net	(135)	(130)
Income from bank owned life insurance	1,001	1,085
Mortgage banking income	249	956
Other operating income	1,175	1,176
Total noninterest income	19,657	16,378
Noninterest expense:
Compensation and employee benefits	27,972	27,930
Premises and occupancy costs	6,557	6,153
Office operations	3,757	3,268
Processing expenses	6,589	5,853
Marketing expenses	1,637	1,900
Federal deposit insurance premiums	1,297	1,438
Professional services	2,062	1,693
Amortization of intangible assets	331	348
Real estate owned expense	639	599
Other expenses	2,322	2,289
Total noninterest expense	53,163	51,471
Income before income taxes	19,906	21,737
Federal and state income taxes	5,266	6,439
Net income	$ 14,640	$ 15,298
Basic earnings per share (in dollars per share)	$ 0.16	$ 0.17
Diluted earnings per share (in dollars per share)	$ 0.16	$ 0.17