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Reportable Segments and Geographic Information - Reconcilation from Net Income to Gross Margin (Details 4) - USD ($)
$ in Thousands
 2 Months Ended 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2015
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Jun. 30, 2015
Jun. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Reconciliation of net income to gross margin                                
Net income (loss)     $ (7,839) $ (14,998) $ 39,970   $ 42,036 $ 18,713 $ 32,763 $ 24,972 $ 51,476 $ 17,133 $ 93,512 $ (125,697) $ 88,661 $ 126,606
Selling, general and administrative $ 600   32,621 31,357 32,568   32,683 31,286 33,739 63,925 65,025 96,546 97,708 131,919 132,651 118,851
Depreciation and amortization     58,087 57,539 57,013   54,101 52,965 49,356 114,552 102,321 172,639 156,422 229,127 212,268 187,476
Long-lived asset impairment     19,933 9,510 8,153   11,341 9,847 3,807 17,663 13,654 37,596 24,995 124,979 42,828 16,696
Restructuring and other charges     289 1,193 0   219 353 4,822 1,193 5,175 1,482 5,394 4,745 5,394 0
Goodwill impairment   $ 3,700                       3,738 0 0
Interest expense     27,996 28,079 26,791   25,555 32,358 27,824 54,870 60,182 82,866 85,737 107,617 112,273 112,194
Debt extinguishment costs                           9,201 0 0
Other (income) expense, net     2,155 (2,482) (550)   (1,751) (903) (236) (3,032) (1,139) (877) (2,890) (2,079) (5,475) (22,535)
Provision for (benefit from) income taxes     2,367 (1,529) (740)   (12,074) (8,289) (17,003) (2,269) (25,292) 98 (37,366) 53,189 (28,066) (17,840)
Income from discontinued operations, net of tax   $ (9,100) $ (10,110) $ 19,328 $ (33,788) $ (12,300) $ (32,459) $ (21,806) $ (39,221) $ (14,460) $ (61,027) $ (24,570) $ (93,486) (33,677) (105,774) (129,654)
Gross margin                           $ 503,062 $ 454,760 $ 391,794