Shareholders' Equity - Summary of Common Shares Outstanding (Details) - shares	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Roll forward of common shares outstanding
Balance at the beginning of the year	32,762,494	32,548,477
Restricted share issuances	174,556	211,032
Balance at the end of the period	32,937,050	32,759,509