Fair Value Disclosures (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Jun. 23, 2015	Dec. 31, 2014	Sep. 30, 2014
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Stated interest rate (percent)		6.00%
7.50% Notes [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Stated interest rate (percent)	7.50%		7.50%
7.5% Senior Exchange Convertible Notes [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Stated interest rate (percent)	7.50%		7.50%
4.50% Notes [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Stated interest rate (percent)			8.50%
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Contingent Consideration, Fair Value	$ 7,200		$ 2,404
Estimate of Fair Value, Fair Value Disclosure [Member] | Notes and Senior Exchange Convertible Notes [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Notes Payable, Fair Value Disclosure	45,740		99,040
Estimate of Fair Value, Fair Value Disclosure [Member] | 8.5% Senior Notes Due 2019 [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Notes Payable, Fair Value Disclosure	199,000		193,000
Estimate of Fair Value, Fair Value Disclosure [Member] | 6.00% Notes [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Notes Payable, Fair Value Disclosure	77,608		0
Estimate of Fair Value, Fair Value Disclosure [Member] | Senior Credit Facility [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Notes Payable, Fair Value Disclosure	30,000		0
Carrying Amount [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Contingent Consideration, Fair Value	7,200		2,404
Carrying Amount [Member] | Notes and Senior Exchange Convertible Notes [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Notes Payable, Fair Value Disclosure	46,793		99,956
Carrying Amount [Member] | 8.5% Senior Notes Due 2019 [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Notes Payable, Fair Value Disclosure	200,000		200,000
Carrying Amount [Member] | 6.00% Notes [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Notes Payable, Fair Value Disclosure	79,926		0
Carrying Amount [Member] | Senior Credit Facility [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Notes Payable, Fair Value Disclosure			$ 0
Line of Credit [Member] | Carrying Amount [Member] | Senior Credit Facility [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Notes Payable, Fair Value Disclosure	$ 30,000
Senior Notes [Member] | 8.5% Senior Notes Due 2019 [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Stated interest rate (percent)	8.50%			8.50%
Senior Notes [Member] | 6.00% Senior Convertible Notes Due 2020 [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Stated interest rate (percent)		6.00%