(Loss) 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
Numerator for (Loss) Earnings per Share Basic and Diluted:
Net (loss) income	$ (33,072)	$ 26,101	$ (19,841)	$ 49,029
Less: Income allocated to participating shares	0	72	0	137
Net (Loss) Income Allocated to Shareholders	(33,072)	26,029	(19,841)	48,892
Net (Loss) Income Available to Shareholders	$ (33,072)	$ 26,101	$ (19,841)	$ 49,029
Denominators for (Loss) Earnings per Share:
Weighted Average Shares Outstanding—Basic (in shares)	39,013,161	34,158,136	39,142,351	34,298,185
Add: Potentially dilutive shares (in shares)	0	52,850	0	88,121
Denominator for Treasury Stock Method—Diluted (in shares)	39,013,161	34,210,986	39,142,351	34,386,306
Weighted Average Shares Outstanding—Basic (in shares)	39,013,161	34,158,136	39,142,351	34,298,185
Add: Average participating shares outstanding (in shares)	0	93,433	0	96,261
Denominator for Two-Class Method—Diluted (in shares)	39,013,161	34,251,569	39,142,351	34,394,446
(Loss) earnings per share—basic (in dollars per share)	$ (0.85)	$ 0.76	$ (0.51)	$ 1.43
(Loss) earnings per share—diluted (in dollars per share)	$ (0.85)	$ 0.76	$ (0.51)	$ 1.43
Restricted Stock
Denominators for (Loss) Earnings per Share:
Anti-dilutive excluded from potentially dilutive shares (in shares)	21,333	5,183	82,624	44,153