Derivative Instruments (Details)		1 Months Ended	12 Months Ended
	Jan. 13, 2015 USD ($)	Jan. 31, 2014	Dec. 31, 2015 USD ($) $ / SGD	Dec. 31, 2014 USD ($) $ / SGD	Dec. 31, 2013 USD ($)
Derivative [Line Items]
Lender accelerated indebtedness repayment threshold amount			$ 75,000,000.0
Fair value of effective cash flow hedges			1,100,000	$ (2,400,000)
Ineffective portion of cash flow hedges			0	800,000.0	$ 0
Gain (loss) to be reclassified within twelve months			(700,000)
Notional Amount			469,484,000	703,870,000
Fair Value at Significant Other Observable Inputs (Level 2)			1,143,000	(2,409,000)
Gain (loss) on cash flow hedge ineffectiveness			$ (1,600,000)	800,000	$ 0
Designated as Hedging Instrument | Cash Flow Hedging
Derivative [Line Items]
Derivative term of contract		5 years
Gain (loss) on cash flow hedge ineffectiveness				$ 800,000
Payments for derivative instruments	$ 5,700,000
Singapore dollar (SGD)
Derivative [Line Items]
Derivative forward exchange rate (in dollars per share) | $ / SGD			0.70	0.75
Currently-paying contracts
Derivative [Line Items]
Notional Amount			$ 469,484,000	$ 553,870,000
Fair Value at Significant Other Observable Inputs (Level 2)			1,143,000	428,000
Currently-paying contracts | Swap 1
Derivative [Line Items]
Notional Amount			$ 335,905,000	410,905,000
Strike Rate			0.717%
Fair Value at Significant Other Observable Inputs (Level 2)			$ (357,000)	(241,000)
Currently-paying contracts | Swap 2
Derivative [Line Items]
Notional Amount			$ 133,579,000	142,965,000
Strike Rate			0.925%
Fair Value at Significant Other Observable Inputs (Level 2)			$ 1,500,000	669,000
Forward-starting contracts
Derivative [Line Items]
Notional Amount			$ 0	150,000,000
Strike Rate			2.091%
Fair Value at Significant Other Observable Inputs (Level 2)			$ 0	$ (2,837,000)