Financial Instruments and Fair Value Measurements - Assets Measured at Fair Value on a Nonrecurring Basis (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total Impairment Charge	$ 0	$ 0	$ 5,080
Income Approach Valuation Technique
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total Impairment Charge			4,911
Market Approach Valuation Technique
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total Impairment Charge			169
Fair Value, Measurements, Nonrecurring | Level 3 | Income Approach Valuation Technique
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Investment in real estate, net			2,420
Fair Value, Measurements, Nonrecurring | Level 3 | Market Approach Valuation Technique
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Investment in real estate, net			$ 722
Fair Value, Measurements, Nonrecurring | Level 3 | Real Estate Investment | Income Approach Valuation Technique
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value inputs, discount rate			14.00%
Fair value inputs, cap rate			11.80%
Fair Value, Measurements, Nonrecurring | Level 3 | Real Estate Investment | Income Approach Valuation Technique | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value inputs, estimated revenue growth			5.00%
Fair Value, Measurements, Nonrecurring | Level 3 | Real Estate Investment | Income Approach Valuation Technique | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value inputs, estimated revenue growth			16.00%
Fair Value, Measurements, Nonrecurring | Level 3 | Real Estate Investment | Market Approach Valuation Technique | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value inputs, estimated selling price			$ 700
Fair Value, Measurements, Nonrecurring | Level 3 | Real Estate Investment | Market Approach Valuation Technique | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value inputs, estimated selling price			$ 900