Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2020

Fair Value Disclosures [Abstract]

Assets Measured at Fair Value on a Recurring Basis

	Recurring Fair Value Measurements at Reporting Date
	September 30, 2020						December 31, 2019
(Dollars in thousands)	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
Assets:
Available-for-sale investment securities:
Obligations of:
U.S. government sponsored agencies	$	—	$	5,383	$	—	$	—	$	8,209	$	—
States and political subdivisions	—		104,126		—		—		114,104		—
Residential mortgage-backed securities	—		726,992		—		—		791,009		—
Commercial mortgage-backed securities	—		10,568		—		—		18,088		—
Bank-issued trust preferred securities	—		4,633		—		—		4,691		—
Total available-for-sale securities	—		851,702		—		—		936,101		—
Equity investment securities (a)	97		209		—		123		198		—
Derivative assets (b)	—		30,651		—		—		11,419		—
Liabilities:
Derivative liabilities (c)	$	—	$	44,002	$	—	$	—	$	15,116	$	—

(a)    Included in other investment securities on the Unaudited Consolidated Balance Sheets. For additional information, see "Note 3 Investment Securities" of the Notes to the Unaudited Consolidated Financial Statements.

(b)    Included in other assets on the Unaudited Consolidated Balance Sheets. For additional information, see "Note 9 Derivative Financial Instruments" of the Notes to the Unaudited Consolidated Financial Statements.

(c)    Included in accrued expenses and other liabilities on the Unaudited Consolidated Balance Sheets. For additional information, see "Note 9 Derivative Financial Instruments" of the Notes to the Unaudited Consolidated Financial Statements.

Fair Value Measurements, Nonrecurring [Table Text Block]

The following table provides the fair value for each class of assets and liabilities required to be measured and reported at fair value on a non-recurring basis on the Unaudited Consolidated Balance Sheets by level in the fair value hierarchy.

	Non-Recurring Fair Value Measurements at Reporting Date
	September 30, 2020						December 31, 2019
(Dollars in thousands)	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
Other real estate owned ("OREO")	$	—	$	—	$	293	$	—	$	—	$	227

Fair Values of Financial Assets and Liabilities on Balance Sheets

	Fair Value Measurements of Other Financial Instruments
(Dollars in thousands)	Fair Value Hierarchy Level	September 30, 2020				December 31, 2019
		Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets:
Cash and cash equivalents	1	$	161,251	$	161,251	$	115,193	$	115,193
Held-to-maturity investment securities:
Obligations of:
States and political subdivisions	2	3,539		4,073		4,346		4,791
Residential mortgage-backed securities	2	26,926		27,879		21,494		21,569
Commercial mortgage-backed securities	2	5,678		6,134		5,907		6,181
Total held-to-maturity securities		36,143		38,086		31,747		32,541
Other investment securities:
Federal Home Loan Bank ("FHLB") stock	2	25,022		25,022		27,235		27,235
Federal Reserve Bank ("FRB") stock	2	13,311		13,311		13,310		13,310
Nonqualified deferred compensation	2	1,711		1,711		1,499		1,499
Other investment securities	2	365		365		365		365
Other investment securities (a)		40,409		40,409		42,409		42,409
Net loans	3	3,413,957		3,486,317		2,851,969		3,147,190
Loans held for sale	2	7,420		8,796		6,499		6,553
Bank owned life insurance	3	71,127		71,127		69,722		69,722
Servicing rights (b)(c)	3	2,489		2,789		2,742		3,881
Liabilities:
Deposits	2	$	3,952,005	$	3,853,468	$	3,291,412	$	3,292,950
Short-term borrowings	2	182,063		185,713		316,977		317,973
Long-term borrowings	2	111,386		116,741		83,123		82,701