Earnings Per Share (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Basic Net Income per Common Share Available to Common Stockholders [Abstract]
Net income	$ 13,316,000	$ 8,390,000
Weighted average common shares outstanding	16,665,999	12,671,017
Basic earnings per common share	$ 0.80	$ 0.66
Diluted Net Income per Common Share Available to Common Stockholders [Abstract]
Net income applicable to diluted earnings per share	$ 13,316,000	$ 8,390,000
Weighted average common shares outstanding	16,665,999	12,671,017
Dilutive potential common shares [Abstract]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	0	3,980
Restricted stock awarded	38,780	13,250
Dilutive potential common shares	38,780	17,230
Diluted weighted average common shares outstanding	16,704,779	12,688,247
Diluted net income per common share available to common stockholders	$ 0.80	$ 0.66