Property and Equipment, Net - Depreciation Expense Table (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Depreciation Expense [Line Items]
Depreciation expense	$ 8,030	$ 7,050
Continuing Operations [Member]
Depreciation Expense [Line Items]
Depreciation expense	8,030	7,050
Cost of Sales [Member] | Continuing Operations [Member]
Depreciation Expense [Line Items]
Depreciation expense	6,740	6,060
Selling, General and Administrative Expenses [Member] | Continuing Operations [Member]
Depreciation Expense [Line Items]
Depreciation expense	$ 1,290	$ 990