Equity and EPS - Computations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operations:
Net income	$ 15,427	$ 9,842
Less: Income attributable to participating securities	146	66
Net income attributable to common shareholders and used in Earnings Per Share calculation	$ 15,281	$ 9,776
Share information:
Basic and diluted weighted average common shares (in shares)	16,928,003	17,013,925
Basic and diluted EPS (in USD per share)	$ 0.90	$ 0.57
Restricted Stock Units (RSUs)
Share information:
Participating securities (in shares)	162,496	116,127