Annual report pursuant to Section 13 and 15(d)

Debt - Additional Information (Details)

v3.6.0.2
Debt - Additional Information (Details)
shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2014
USD ($)
shares
Senior Secured Revolving Credit Facility    
Debt Instrument [Line Items]    
Maximum consolidated leverage ratio 5.0  
7% Exchangeable Senior Subordinated Notes Due 2014    
Debt Instrument [Line Items]    
Principal amount of converted debt | $   $ 502,370
Shares issued upon debt conversion (in shares) | shares   272,856