Net Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	15,333	9,998
Net Income	$ 16,834	$ 30,998
Weighted average number of common shares outstanding (for basic calculation)	20,780,000	20,527,000
Dilutive securities	727,000	1,024,000
Diluted (in shares)	21,507,000	21,551,000
EPS - basic	$ 0.81	$ 1.51
Diluted (In dollars per share)	$ 0.78	$ 1.44