Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
ASSETS
Cash and due from banks	$ 203,364	$ 203,545
Interest-bearing deposits with banks	1,394,813	1,710,350
Securities (fair value: $553,010 and $524,861, respectively)	552,949	524,783
Loans held for sale	13,725	9,433
Loans (net of unearned interest)	4,232,048	3,851,398
Allowance for loan losses	(41,666)	(40,889)
Loans, net of allowance for loan losses	4,190,382	3,810,509
Premises and equipment, net	126,813	121,341
Other real estate owned	7,984	7,859
Intangible assets, net	15,695	10,635
Goodwill	54,042	44,962
Accrued interest receivable and other assets	133,062	131,555
Total assets	6,692,829	6,574,972
Deposits:
Noninterest-bearing	2,409,769	2,411,066
Interest-bearing	3,563,589	3,493,638
Total deposits	5,973,358	5,904,704
Short-term borrowings	500	3,982
Accrued interest payable and other liabilities	31,502	30,168
Junior subordinated debentures	31,959	26,804
Total liabilities	$ 6,037,319	$ 5,965,658
Commitments and contingent liabilities (Note 19)
Stockholders' equity:
Common stock, $1.00 par, 20,000,000 shares authorized; shares issued and outstanding: 15,597,446 and 15,504,513, respectively	$ 15,597	$ 15,504
Capital surplus	102,865	96,841
Retained earnings	535,521	492,776
Accumulated other comprehensive income, net of income tax of $962 and $2,644, respectively	1,527	4,193
Total stockholders' equity	655,510	609,314
Total liabilities and stockholders' equity	$ 6,692,829	$ 6,574,972
Senior Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value
Cumulative Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value