Debt (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014 Revolving Credit Facility [Member]	Jan. 31, 2014 Revolving Credit Facility [Member]	Jan. 31, 2014 Term-A Facility [Member]	Dec. 16, 2013 Term-A Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity		$ 500,000
Debt Instrument, Face Amount			500,000	600,000	880,000
Payments of Debt Issuance Costs	$ 9,266