Fair Value of Financial Instruments Financial Instruments Carried at Fair Value-Level 2 (Details) (Fair Value, Inputs, Level 2 [Member], USD $)	Mar. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial liabilities carried at fair value	$ 15,094,000	$ 4,711,000
Interest rate swap agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	0	136,000
Derivative liability	14,307,000	4,711,000
British pound forward purchase contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts liability	$ 787,000	$ 0