Fair Value of Financial Instruments - Fair Value, Liabilities Measured on Recurring Basis (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, at fair value	$ 490	$ 0
Quoted Prices in Active Markets Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, at fair value		0
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, at fair value	490
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, at fair value	490
Fair Value, Measurements, Recurring | Significant Other Observable Inputs Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, at fair value	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, at fair value	0
Foreign currency swaps | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value, Interest rate swap	11,289
Fair value, Foreign Currency		(2,565)
Foreign currency swaps | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value, Interest rate swap	0
Fair value, Foreign Currency		0
Foreign currency swaps | Fair Value, Measurements, Recurring | Significant Other Observable Inputs Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value, Interest rate swap	11,289
Fair value, Foreign Currency		(2,565)
Foreign currency swaps | Fair Value, Measurements, Recurring | Significant Unobservable Inputs Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value, Interest rate swap	0
Fair value, Foreign Currency		0
Foreign currency forwards, net | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value, Interest rate swap	1,884
Foreign currency forwards, net | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value, Interest rate swap	0
Foreign currency forwards, net | Fair Value, Measurements, Recurring | Significant Other Observable Inputs Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value, Interest rate swap	1,884
Foreign currency forwards, net | Fair Value, Measurements, Recurring | Significant Unobservable Inputs Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value, Interest rate swap	0
Interest rate swaps, net | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value, Interest rate swap		734
Fair value, Foreign Currency	(5,650)
Interest rate swaps, net | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value, Interest rate swap		0
Fair value, Foreign Currency	0
Interest rate swaps, net | Fair Value, Measurements, Recurring | Significant Other Observable Inputs Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value, Interest rate swap		734
Fair value, Foreign Currency	(5,650)
Interest rate swaps, net | Fair Value, Measurements, Recurring | Significant Unobservable Inputs Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value, Interest rate swap		0
Fair value, Foreign Currency	$ 0