Subsequent Events (Narrative) (Details) $ in Thousands, NZD in Millions				1 Months Ended	3 Months Ended	12 Months Ended
		Apr. 26, 2017 NZD	Apr. 26, 2017 USD ($)	Apr. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Subsequent Event [Line Items]
Contractual facility					$ 268,944	$ 266,134
Insurance receivable, current	[1]				$ 9,839
Subsequent Event [Member]
Subsequent Event [Line Items]
Insurance receivable, current				$ 20,000
Proceeds from insurance settlement				$ 25,000
New Zealand Corporate Credit Facility, Tranch 1 [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Contractual facility		NZD 35.0	$ 24,500
Maturity date		Mar. 31, 2018	Mar. 31, 2018

[1] Refer to Note 18 - Insurance Recoverable for further discussion on this item.