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Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Basic EPS
Net income	$ 8,686	$ 8,084	$ 8,073	$ 7,726	$ 5,235	$ 5,983	$ 5,710	$ 5,783	$ 32,569	$ 22,711	$ 20,557
Weighted average shares outstanding									27,674,705	27,567,909	27,180,230
Basic earnings per share									$ 1.18	$ 0.82	$ 0.76
Diluted EPS
Net income	$ 8,686	$ 8,084	$ 8,073	$ 7,726	$ 5,235	$ 5,983	$ 5,710	$ 5,783	$ 32,569	$ 22,711	$ 20,557
Weighted average shares outstanding									27,674,705	27,567,909	27,180,230
Average unvested restricted stock awards									299,480	51,167	29,108
Weighted average shares for diluted earnings per share									27,974,185	27,619,076	27,209,338
Diluted earnings per share									$ 1.16	$ 0.82	$ 0.76

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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