Accumulated Other Comprehensive Income/(Loss) - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 13,417
Recapitalization of New Zealand JV			$ 0
Ending balance	239	$ 13,417
Accumulated Other Comprehensive Income/(Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	13,417	856
Other comprehensive (loss)/income before reclassifications	(12,979)	14,064
Amounts reclassified from accumulated other comprehensive income	(199)	(1,503)
Net other comprehensive (loss)/income	(13,178)	12,561
Recapitalization of New Zealand JV			3,438
Ending balance	239	13,417	856
Foreign currency translation gains/(losses)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	15,975	8,559
Other comprehensive (loss)/income before reclassifications	(16,985)	7,416
Amounts reclassified from accumulated other comprehensive income	0	0
Net other comprehensive (loss)/income	(16,985)	7,416
Ending balance	(1,010)	15,975	8,559
Net investment hedges of New Zealand JV
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	1,665	1,665
Other comprehensive (loss)/income before reclassifications	(344)	0
Amounts reclassified from accumulated other comprehensive income	0	0
Net other comprehensive (loss)/income	(344)	0
Ending balance	1,321	1,665	1,665
Cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	16,184	10,831
Other comprehensive (loss)/income before reclassifications	5,944	7,321
Amounts reclassified from accumulated other comprehensive income	(163)	(1,968)
Net other comprehensive (loss)/income	5,781	5,353
Ending balance	21,965	16,184	10,831
Cash flow hedges | Interest rate swaps
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other comprehensive (loss)/income before reclassifications	8,300
Employee benefit plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(20,407)	(20,199)
Other comprehensive (loss)/income before reclassifications	(1,594)	(673)
Amounts reclassified from accumulated other comprehensive income	(36)	465
Net other comprehensive (loss)/income	(1,630)	(208)
Ending balance	$ (22,037)	(20,407)	$ (20,199)
Accounting Standards Update 2018-02
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Cumulative-effect adjustment due to adoption of ASU		0
Accounting Standards Update 2018-02 | Accumulated Other Comprehensive Income/(Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Cumulative-effect adjustment due to adoption of ASU		$ 711