Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Net income attributable to common shareholders	$ 29,993	$ 17,918
Weighted average common shares outstanding - basic (in shares)	112,594	112,337
Net effect of dilutive securities:
Contingently issuable performance shares and restricted stock units (in shares)	268	398
Weighted average common shares outstanding — diluted (in shares)	112,862	112,735
Earnings per weighted-average common share outstanding
Net income attributable to common shareholders - basic (in dollars per share)	$ 0.27	$ 0.16
Net income attributable to common shareholders - diluted (in dollars per share)	$ 0.27	$ 0.16