Equity (Details) - shares shares in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Class of Stock [Line Items]
Common shares at beginning of period	64,742	64,502
Issuance of common shares	112	0
Issuance of restricted shares	56	320
Forfeiture of restricted shares	(134)	(75)
Common shares at end of period	64,776	64,747