Shareholders' Equity - Summary of Common Shares Outstanding (Details) - shares	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Roll forward of common shares outstanding
Balance at the beginning of the year	32,750,727	32,938,466
Restricted share issuances	136,520	148,577
Balance at the end of the period	32,707,281	33,087,043