Property and Equipment, Net - Depreciation Expense Table (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Depreciation Expense [Line Items]
Depreciation expense			$ 24,190	$ 22,190
Continuing Operations [Member]
Depreciation Expense [Line Items]
Depreciation expense	7,870	7,630	24,180	22,180
Cost of Sales [Member] | Continuing Operations [Member]
Depreciation Expense [Line Items]
Depreciation expense	6,760	6,440	20,480	18,910
Selling, General and Administrative Expenses [Member] | Continuing Operations [Member]
Depreciation Expense [Line Items]
Depreciation expense	$ 1,110	$ 1,190	$ 3,700	$ 3,270