Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Assets Measured at Fair Value on a Recurring Basis

	Recurring Fair Value Measurements at Reporting Date
	March 31, 2018						December 31, 2017
(Dollars in thousands)	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
Assets:
Securities available-for-sale:
Obligations of:
States and political subdivisions	$	—	$	97,205	$	—	$	—	$	101,569	$	—
Residential mortgage-backed securities	—		681,746		—		—		673,664		—
Commercial mortgage-backed securities	—		6,864		—		—		6,976		—
Bank-issued trust preferred securities	—		5,095		—		—		5,129		—
Equity securities (a)	—		—		—		7,694		155
Total available-for-sale securities	—		790,910		—		7,694		787,493		—
Securities held-to-maturity:
Obligations of:
States and political subdivisions	—		4,300		—		—		4,417		—
Residential mortgage-backed securities	—		30,978		—		—		32,227		—
Commercial mortgage-backed securities	—		4,162		—		—		4,569		—
Total held-to-maturity securities	—		39,440		—		—		41,213		—
Equity securities (a)	7,311		160		—		—		—		—
Derivative assets (b)	—		6,633		—		—		4,594		—
Liabilities:
Derivative liabilities (c)	$	—	$	3,870	$	—	$	—	$	3,241	$	—

Fair Values of Financial Assets and Liabilities on Balance Sheets

	Fair Value Measurements of Other Financial Instruments
(Dollars in thousands)	Fair Value Hierarchy Level	March 31, 2018				December 31, 2017
		Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets:
Cash and cash equivalents	1	$	72,629	$	72,629	$	72,194	$	72,194
Other investment securities:
FHLB stock	2	28,132		28,132		28,132		28,132
FRB stock	2	10,179		10,179		10,179		10,179
Non-qualified deferred comp (a)	2	914		914		—		—
FHLMC stock	2	60		60		60		60
Total other investment securities		39,285		39,285		38,371		38,371
Loans	3	2,383,530		2,297,373		2,338,344		2,274,194
Bank owned life insurance (BOLI)	3	62,644		62,644		62,176		62,176
Bank premises and equipment, net	3	56,247		56,247		52,510		52,510
Servicing rights (b)	3	2,303		2,303		2,305		2,305
Liabilities:
Deposits	2	$	2,813,181	$	2,809,738	$	2,730,330	$	2,730,071
Short-term borrowings	2	203,475		203,494		209,491		209,628
Long-term borrowings	2	123,481		119,817		144,019		142,108