Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 7,246	$ 6,416	$ 20,409	$ 15,500
Net change in fair value of interest rate swap agreement designated as cash flow hedge:
Unrealized gain (loss) on interest rate swap, net of tax of $0 and ($17) for the three months ended September 30, 2017 and 2016, and $1 and $42 for the nine months ended September 30, 2017 and 2016	0	32	(2)	(77)
Reclassification adjustment for losses recognized in earnings, net of tax of ($25) and ($29) for the three months ended September 30, 2017 and 2016, and ($77) and ($91) for the nine months ended September 30, 2017 and 2016	46	55	143	169
Net change in fair value of interest rate swap agreements designated as cash flow hedges	46	87	141	92
Unrealized gains on other-than-temporarily impaired securities available for sale:
Unrealized gains (losses) arising during the period, net of tax of $0 and $0 for the three months ended September 30, 2017 and 2016, and ($47) and $276 for the nine months ended September 30, 2017 and 2016	0	0	87	(513)
Reclassification adjustment for realized gains included in net income, net of tax of $0 and $0 for the three months ended September 30, 2017 and 2016, and $484 and $323 for the nine months ended September 30, 2017 and 2016	0	0	(899)	(599)
Unrealized gains on other-than-temporarily impaired securities available for sale net of reclassification adjustment for realized gains (losses) included in net income	0	0	(812)	(1,112)
Unrealized gains on other securities available for sale:
Unrealized gains (loss) arising during the period, net of tax of $433 and ($103) for the three months ended September 30, 2017 and 2016, and ($1,111) and ($3,039) for the nine months ended September 30, 2017 and 2016	(814)	187	2,059	5,641
Reclassification adjustment for realized gains included in net income, net of tax of $2 and $0 for the three months ended September 30, 2017 and 2016, and $56 and $29 for the nine months ended September 30, 2017 and 2016	(3)	0	(104)	(54)
Unrealized losses on other securities available for sale net of reclassification adjustment for realized gains included in net income	(817)	187	1,955	5,587
Other comprehensive income (loss)	(771)	274	1,284	4,567
COMPREHENSIVE INCOME	$ 6,475	$ 6,690	$ 21,693	$ 20,067