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TOTAL EQUITY - Share Repurchase (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Mar. 31, 2017
Sep. 30, 2017
Repurchases of common stock    
Reduction of equity for retirement of repurchased shares   $ 28,863
Common shares    
Repurchases of common stock    
Share repurchase program, period for repurchases 12 months  
Repurchased and retired shares   228
Weighted average market price of shares repurchased and retired (in dollars per share)   $ 47.07
Reduction of equity for retirement of repurchased shares   $ 10,800
Authorized share repurchase capacity remaining   $ 64,200
Common shares | Maximum    
Repurchases of common stock    
Repurchase authorization $ 75,000