Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Assets:
Cash and cash equivalents	$ 120,208	$ 38,968
Investment securities available-for-sale, at fair value	679,463	697,544
Loans	3,123,301	3,188,249
Allowance for credit losses	(34,105)	(29,289)
Total	3,089,196	3,158,960
Restricted stock, at cost	30,224	30,899
Bank premises and equipment, net	39,646	40,017
Right-of-use asset - operating leases	13,992	14,343
Bank-owned life insurance	83,680	83,119
Pension plan assets, net	18,341	18,275
Deferred income tax benefit	3,767	317
Other assets	15,850	15,401
Total assets	4,094,367	4,097,843
Deposits:
Checking	973,355	911,978
Savings, NOW and money market	1,682,389	1,720,599
Time, $100,000 and over	250,991	242,359
Time, other	267,102	269,080
Total	3,173,837	3,144,016
Short-term borrowings	60,599	190,710
Long-term debt	452,472	337,472
Operating lease liability	14,874	15,220
Accrued expenses and other liabilities	16,376	21,317
Total liabilities	3,718,158	3,708,735
Stockholders' Equity:
Common stock, par value $0.10 per share: Authorized, 80,000,000 shares; Issued and outstanding, 23,806,901 and 23,934,632 shares	2,381	2,393
Surplus	105,156	111,744
Retained earnings	276,913	274,376
Total	384,450	388,513
Accumulated other comprehensive income (loss), net of tax	(8,241)	595
Total	376,209	389,108
Total	4,094,367	4,097,843
Commercial And Industrial [Member]
Assets:
Loans	126,073	103,879
Allowance for credit losses	(1,931)	(1,493)
Commercial Mortgages [Member]
Assets:
Loans	1,376,257	1,401,289
Consumer And Other [Member]
Assets:
Loans	2,274	2,431
Allowance for credit losses	(7)	(13)
Closed-end [Member] | Residential Mortgages [Member]
Assets:
Loans	1,558,401	1,621,419
Allowance for credit losses	(17,459)	(15,698)
Revolving Home Equity [Member] | Residential Mortgages [Member]
Assets:
Loans	60,296	59,231
Allowance for credit losses	$ (487)	$ (515)