Immaterial Misstatement (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Dec. 16, 2014
Current assets:
Other short-term assets		$ 1,555
Other assets:
Deferred income taxes	$ 1,173	117,662
Other long-term assets	10,051	6,665
Total assets	1,123,686	2,509,928
Current liabilities:
Deferred income taxes	1,173	117,662
Total liabilities and shareholders’ deficit	$ 1,123,686	2,509,928
2019 Senior Notes
Restatement of previously reported balances
Interest rate (as a percent)	7.00%		7.25%
2020 Senior Notes
Restatement of previously reported balances
Interest rate (as a percent)	7.00%		7.50%
As Previously Reported | Classification Errors
Current assets:
Other short-term assets		8,120
Other assets:
Deferred income taxes		46,084
Other long-term assets		100
Total assets		2,438,350
Current liabilities:
Deferred income taxes		46,084
Total liabilities and shareholders’ deficit		2,438,350
Adjustments | Classification Errors
Current assets:
Other short-term assets		(6,565)
Other assets:
Deferred income taxes		71,578
Other long-term assets		6,565
Total assets		71,578
Current liabilities:
Deferred income taxes		71,578
Total liabilities and shareholders’ deficit		$ 71,578