Shareholders' Equity - Summary of Common Shares Outstanding (Details) - shares	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Roll forward of common shares outstanding
Balance at the beginning of the year			32,472,406	32,276,787	32,472,406
Repurchases	(148,035)	(122,000)	(220,731)	(148,035)	(342,731)
Restricted share issuances				159,397	138,276
Balance at the end of the period	32,288,149			32,288,149	32,267,951