Earnings Per Share - Basic Net Income (loss) Per Share is Calculated Using Weighted Average Number of Shares (Details) - $ / shares	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Earnings per share – basic (in dollars per share)	$ 0.27	$ 0.46	$ 0.20	$ 0.11	$ 0.19	$ 0.11	$ 0.10	$ 0.00	$ 1.04	$ 0.41	$ 0.33
Earnings per share – diluted (in dollars per share)	$ 0.26	$ 0.45	$ 0.19	$ 0.11	$ 0.18	$ 0.10	$ 0.09	$ 0.00	$ 1.01	$ 0.39	$ 0.29
Weighted average shares of common stock outstanding – basic (in shares)									36,527,672	34,708,429	32,893,940
Weighted average shares of common stock outstanding - diluted (in shares)									37,448,430	36,403,279	37,914,886