Fair Value of Financial Instruments, Derivatives and Fair Value Disclosures (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 595,331	[1]	$ 512,404	[1]
8.125% notes due 2018 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable, Fair Value Disclosure	(300,270)		(294,300)
OBS Term Loan due 2019 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans Payable, Fair Value Disclosure	(604,462)		(589,863)
OIN Term Loan due 2019 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans Payable, Fair Value Disclosure	(632,238)		(618,981)
7.5% notes due 2024 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable, Fair Value Disclosure	(604)		(626)
7.5% Election 1 notes due 2021 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable, Fair Value Disclosure	(5,747)		(5,511)
7.5% Election 2 notes due 2021 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable, Fair Value Disclosure	(131,426)		(131,773)
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	595,331	[1]	512,404	[1]
Fair Value, Inputs, Level 1 [Member] | 8.125% notes due 2018 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 1 [Member] | OBS Term Loan due 2019 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans Payable, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 1 [Member] | OIN Term Loan due 2019 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans Payable, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 1 [Member] | 7.5% notes due 2024 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 1 [Member] | 7.5% Election 1 notes due 2021 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 1 [Member] | 7.5% Election 2 notes due 2021 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	[1]	0	[1]
Fair Value, Inputs, Level 2 [Member] | 8.125% notes due 2018 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable, Fair Value Disclosure	(300,270)		(294,300)
Fair Value, Inputs, Level 2 [Member] | OBS Term Loan due 2019 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans Payable, Fair Value Disclosure	(604,462)		(589,863)
Fair Value, Inputs, Level 2 [Member] | OIN Term Loan due 2019 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans Payable, Fair Value Disclosure	(632,238)		(618,981)
Fair Value, Inputs, Level 2 [Member] | 7.5% notes due 2024 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable, Fair Value Disclosure	(604)		(626)
Fair Value, Inputs, Level 2 [Member] | 7.5% Election 1 notes due 2021 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable, Fair Value Disclosure	(5,747)		(5,511)
Fair Value, Inputs, Level 2 [Member] | 7.5% Election 2 notes due 2021 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable, Fair Value Disclosure	$ (131,426)		$ (131,773)

[1] Includes restricted cash of $118,010 and $123,178 at March 31, 2015 and December 31, 2014, respectively.