Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Numerator for Earnings per Share Basic and Diluted:
Net income	$ 31,902	$ 13,231
Less: Income allocated to participating shares	141	29
Net Income Allocated to Shareholders	31,761	13,202
Net Income Available to Shareholders	$ 31,902	$ 13,231
Denominators for Earnings per Share:
Weighted average shares outstanding—basic (in shares)	39,021,208	39,271,540,000
Add: Potentially dilutive shares (in shares)	99,922	108,116,000
Denominator for Treasury Stock Method—Diluted (in shares)	39,121,130	39,379,656,000
Add: Average participating shares outstanding (in shares)	0	54,398,000
Denominator for Two-Class Method—Diluted (in shares)	39,021,208	39,325,938,000
Earnings per share—basic (in dollars per share)	$ 0.81	$ 0.34
Earnings per share—diluted (in dollars per share)	$ 0.81	$ 0.34
Restricted Stock
Denominators for Earnings per Share:
Restricted stock considered anti-dilutive excluded from potentially dilutive shares (in shares)	165,000	41,000