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Discontinued Operations and Dispositions - Summary of Discontinued Operations (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Discontinued Operations and Disposal Groups [Abstract]        
Revenue $ 2,112 $ 80,349 $ 23,254 $ 174,674
Cost of revenue 1,737 24,552 14,025 67,551
Selling, general and administrative 2,267 85,812 21,508 175,434
Operating loss (1,892) (30,015) (12,279) (68,311)
Other income (expense):        
Interest expense, net 0 (2,197) 0 (3,358)
Gain on sale of businesses 0 0 263,567 0
Other, net 2,974 (2,016) 2,499 507
Total other income (expense), net 2,974 (4,213) 266,066 (2,851)
Income (loss) from discontinuing operations before income taxes 1,082 (34,228) 253,787 (71,162)
Provision (benefit) for income taxes 386 (17,578) 94,180 (30,456)
Net income (loss) from discontinued operations $ 696 $ (16,650) $ 159,607 $ (40,706)