Property and Equipment, Net - Depreciation Expense Table (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Depreciation Expense [Line Items]
Depreciation expense	$ 30,810	$ 25,050	$ 25,940
Continuing Operations [Member]
Depreciation Expense [Line Items]
Depreciation expense	30,810	25,050	23,770
Cost of Sales [Member] | Continuing Operations [Member]
Depreciation Expense [Line Items]
Depreciation expense	26,410	21,530	20,800
Selling, General and Administrative Expenses [Member] | Continuing Operations [Member]
Depreciation Expense [Line Items]
Depreciation expense	$ 4,400	$ 3,520	$ 2,970