Schedule II (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Allowance for doubtful accounts receivable:
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 1,926	$ 11,005	$ 11,833	$ 11,847
Changes to Expense	(22)	(18)	(14)
Deductions- Write-offs	(9,057)	(810)	0
Balance at End of Year	1,926	11,005	11,833	11,847
Valuation/Allowance for deferred tax assets:
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	41,321	41,271	38,742	85,755
Changes to Expense	3,402	2,935	(47,013)
Deductions- Write-offs	(3,352)	(406)	0
Balance at End of Year	$ 41,321	$ 41,271	$ 38,742	$ 85,755