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Segment Information - General Corporate Expenses and Other Business Operations, Net (Parenthetical) (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Selling, general and administrative:        
Total selling, general and administrative $ (29,382) $ (25,208) $ (89,598) $ (77,364)
Operating income (loss) (54,887) (1,197) (38,104) 48,428
Corporate [Member]        
Selling, general and administrative:        
Personnel costs (4,428) (2,134) (11,118) (6,478)
Fees and expenses relating to shareholders (113) (230) (4,447) (4,692)
Professional fees (1,556) (1,185) (4,387) (3,333)
All other (1,058) (915) (2,829) (2,633)
Total selling, general and administrative (7,155) (4,464) (22,781) (17,136)
Other income 4 19 73 69
Other expense (22) (14) (74) (14)
Operating income (loss) $ (7,173) $ (4,459) $ (22,782) $ (17,081)