Line of Credit (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended
	Oct. 23, 2013
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 100
Debt Convenent, Minimum Required Average Bank Account Balances	30
Debt Convenant, Minimum Required Quarterly EBIDTA	75
Debt Covenant, Required Balance of Cash and Cash Equivalents and Marketable Securities	$ 500
London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.00%