Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares of common stock (in shares)	130,400	105,000	123,000	105,000
Basic and Diluted Earnings Per Share Calculations [Abstract]
Net income	$ 20,948	$ 9,643	$ 27,017	$ 16,185
Weighted average shares outstanding (in shares)	24,464,000	26,242,000	24,934,000	26,370,000
Effect of dilutive potential common shares (in shares)	49,000	170,000	137,000	202,000
Diluted weighted average shares outstanding (in shares)	24,513,000	26,412,000	25,071,000	26,572,000
Basic earnings per share (in dollars per share)	$ 0.86	$ 0.37	$ 1.08	$ 0.61
Diluted earnings per share (in dollars per share)	$ 0.85	$ 0.37	$ 1.08	$ 0.61