Shareholders' Equity - Summary of Common Shares Outstanding (Details 3) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Roll forward of common shares outstanding
Balance at the beginning of the year, shares	32,750,727	32,938,466
Repurchases, shares	(420,770)	(342,100)
Restricted share issuances, shares	142,449	154,361
Balance at the end of the period, shares	32,472,406	32,750,727