SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

	First Quarter				Second Quarter				Third Quarter				Fourth Quarter
	2018		2017		2018		2017		2018		2017		2018		2017
					(Dollars in thousands, except per share data)
Interest income	$	73,749	$	64,407	$	79,167	$	68,133	$	82,875	$	71,778	$	87,910	$	72,876
Interest expense	5,278		4,207		5,999		4,378		6,641		4,705		7,618		5,044
Net interest income	68,471		60,200		73,168		63,755		76,234		67,073		80,292		67,832
Provision for loan losses	500		600		2,000		1,050		1,075		—		1,200		1,300
Total noninterest income	19,863		18,912		21,887		21,398		23,264		20,770		23,491		21,914
Total noninterest expenses	53,451		48,773		52,688		52,809		55,439		51,310		64,391		51,467
Provision for income taxes	6,828		9,014		9,249		10,731		9,969		12,681		8,258		14,915
Net income	$	27,555	$	20,725	$	31,118	$	20,563	$	33,015	$	23,852	$	29,934	$	22,064
Basic earnings per share	$	1.00	$	0.77	$	1.13	$	0.75	$	1.20	$	0.87	$	1.08	$	0.80
Diluted earnings per share	$	1.00	$	0.76	$	1.13	$	0.75	$	1.20	$	0.87	$	1.07	$	0.80
Weighted average common shares (basic)	27,486,573		27,029,640		27,526,653		27,257,799		27,537,841		27,436,792		27,815,437		27,445,739
Common stock equivalents	67,381		81,283		54,525		74,497		63,499		76,307		58,576		77,615
Weighted average common shares (diluted)	27,553,954		27,110,923		27,581,178		27,332,296		27,601,340		27,513,099		27,874,013		27,523,354
Unusual or infrequently occurring items
Items within noninterest expense
Merger and acquisition expense	$	—	$	484	$	434	$	2,909	$	2,688	$	—	$	8,046	$	—
Items within provision for income taxes
2017 Tax Act: revaluation of net deferred tax assets	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	1,895
2017 Tax Act: revaluation of LIHTC investments	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	466
Total unusual or infrequently occurring items	$	—	$	484	$	434	$	2,909	$	2,688	$	—	$	8,046	$	2,361