Derivative Instruments and Hedging Activities (Derivative Instruments in Statement of Financial Position Fair Value) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Asset Derivatives
Assets	$ 0	$ 0
Liability Derivatives
Total derivatives	(1,189)	0
Designated as Hedging Instrument [Member]
Asset Derivatives
Assets	0	0
Liability Derivatives
Total derivatives	(1,189)	0
Interest Rate Cap [Member] | Designated as Hedging Instrument [Member]
Asset Derivatives
Assets	0	0
Accrued Expenses And Other Current Liabilities [Member] | Designated as Hedging Instrument [Member]
Liability Derivatives
Liabilities	(4,002)	0
Other Assets [Member] | Designated as Hedging Instrument [Member]
Liability Derivatives
Liabilities	2,813	0
Estimate of Fair Value Measurement [Member]
Asset Derivatives
Assets	0
Liability Derivatives
Liabilities	(1,189)
Estimate of Fair Value Measurement [Member] | Current Assets [Member]
Asset Derivatives
Assets	0
Estimate of Fair Value Measurement [Member] | Current Liabilities [Member]
Liability Derivatives
Liabilities	(1,189)
Level 1 [Member]
Asset Derivatives
Assets	0
Liability Derivatives
Liabilities	0
Level 1 [Member] | Current Assets [Member]
Asset Derivatives
Assets	0
Level 1 [Member] | Current Liabilities [Member]
Liability Derivatives
Liabilities	0
Level 2 [Member]
Asset Derivatives
Assets	0
Liability Derivatives
Liabilities	(1,189)
Level 2 [Member] | Current Assets [Member]
Asset Derivatives
Assets	0
Level 2 [Member] | Current Liabilities [Member]
Liability Derivatives
Liabilities	(1,189)
Level 3 [Member]
Asset Derivatives
Assets	0
Liability Derivatives
Liabilities	0
Level 3 [Member] | Current Assets [Member]
Asset Derivatives
Assets	0
Level 3 [Member] | Current Liabilities [Member]
Liability Derivatives
Liabilities	$ 0