Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
ASSETS
Cash and due from banks	$ 174,061	$ 203,364
Interest-bearing deposits with banks	1,532,095	1,394,813
Federal funds sold	500
Securities (fair value: $473,785 and $553,010, respectively)	473,738	552,949
Loans held for sale	9,685	13,725
Loans (net of unearned interest)	4,307,827	4,232,048
Allowance for loan losses	(48,061)	(41,666)
Loans, net of allowance for loan losses	4,259,766	4,190,382
Premises and equipment, net	126,415	126,813
Other real estate owned	4,038	7,984
Intangible assets, net	13,898	15,695
Goodwill	54,042	54,042
Accrued interest receivable and other assets	135,299	133,062
Total assets	6,783,537	6,692,829
Deposits:
Noninterest-bearing	2,477,107	2,409,769
Interest-bearing	3,547,842	3,563,589
Total deposits	6,024,949	5,973,358
Short-term borrowings	4,000	500
Accrued interest payable and other liabilities	28,898	31,502
Junior subordinated debentures	31,959	31,959
Total liabilities	6,089,806	6,037,319
Stockholders' equity:
Common stock, $1.00 par, 20,000,000 shares authorized; shares issued and outstanding: 15,695,083 and 15,597,446, respectively	15,695	15,597
Capital surplus	111,012	102,865
Retained earnings	565,039	535,521
Accumulated other comprehensive income, net of income tax of $1,252 and $962, respectively	1,985	1,527
Total stockholders' equity	693,731	655,510
Total liabilities and stockholders' equity	6,783,537	6,692,829
Senior Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value
Cumulative Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value