Fair Value Measurement (Tables)

12 Months Ended

Dec. 31, 2018

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on Recurring and Nonrecurring Basis

Fair value of assets measured on a recurring basis as of December 31, 2018:

(dollars in thousands)	Total		Level 1		Level 2		Level 3
Investment securities available for sale:
U.S. Treasury securities	$	200,013	$	200,013	$	—	$	—
Obligations of U.S. government & agencies	195,855		—		195,855		—
Obligations of state & political subdivisions	11,332		—		11,332		—
Mortgage-backed securities	289,890		—		289,890		—
Collateralized mortgage obligations	39,252		—		39,252		—
Other investment securities	1,100		—		1,100		—
Total investment securities available for sale	$	737,442	$	200,013	$	537,429	$	—
Investment securities trading:
Mutual funds	$	7,502	$	7,502	$	—	$	—
Derivatives:
Interest rate swaps	12,550		—		12,550		—
RPAs purchased	71		—		71		—
Total derivatives	$	12,621	$	—	$	12,621	$	—
Total assets measured on a recurring basis at fair value	$	757,565	$	207,515	$	550,050	$	—

Fair value of assets measured on a non-recurring basis as of December 31, 2018:

(dollars in thousands)	Total		Level 1		Level 2		Level 3
Mortgage servicing rights	$	6,277	$	—	$	—	$	6,277
Impaired loans and leases	22,112		—		—		22,112
OREO	417		—		—		417
Total assets measured at fair value on a non-recurring basis	$	28,806	$	—	$	—	$	28,806

Fair value of assets measured on a recurring basis as of December 31, 2017: 

(dollars in thousands)	Total		Level 1		Level 2		Level 3
Investment securities available for sale:
U.S. Treasury securities	$	200,088	$	200,088	$	—	$	—
Obligations of U.S. government & agencies	151,044		—		151,044		—
Obligations of state & political subdivisions	21,310		—		21,310		—
Mortgage-backed securities	274,990		—		274,990		—
Collateralized mortgage obligations	36,662		—		36,662		—
Mutual funds	3,509		3,509		—		—
Other investment securities	1,599		—		1,599		—
Total investment securities available for sale	$	689,202	$	203,597	$	485,605	$	—
Investment securities trading:
Mutual funds	$	4,610	$	4,610	$	—	$	—
Derivatives:
Interest rate swaps	1,895		—		1,895		—
RPAs purchased	21		—		21
Total derivatives	$	1,916	$	—	$	1,916	$	—
Total recurring fair value measurements	$	695,728	$	208,207	$	487,521	$	—

Fair value of assets measured on a non-recurring basis as of December 31, 2017: 

(dollars in thousands)	Total		Level 1		Level 2		Level 3
Mortgage servicing rights	$	6,397	$	—	$	—	$	6,397
Impaired loans and leases	13,954		—		—		13,954
OREO	304		—		—		304
Total assets measured at fair value on a non-recurring basis	$	20,655	$	—	$	—	$	20,655