Earning Per Share - Summary of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Basic net income per share calculation:
Numerator – Net income	$ 4,780	$ 3,195
Denominator – Average common shares outstanding	17,783,239	11,664,245
Basic net income per share of common stock	$ 0.27	$ 0.27
Diluted net income per share calculation:
Numerator – Net income	$ 4,780	$ 3,195
Denominator – Average common shares outstanding	17,783,239	11,664,245
Dilutive shares contingently issuable	1,047,694	1,311,514
Average diluted common shares outstanding	18,830,933	12,975,759
Diluted net income per share of common stock	$ 0.25	$ 0.25