Joint Venture - Narrative (Details) $ in Thousands	1 Months Ended			9 Months Ended		15 Months Ended		24 Months Ended
	Mar. 31, 2018 USD ($)	Sep. 30, 2016 USD ($)	Mar. 31, 2016	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Mar. 31, 2018 CNY (¥)	Mar. 31, 2018 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2018 USD ($)	Jan. 10, 2017 CNY (¥)	Jan. 10, 2017 USD ($)	Mar. 29, 2016 USD ($)
Schedule of Equity Method Investments [Line Items]
Proceeds from investment by noncontrolling interest				$ 128,994	$ 33,000
Purchases of land use rights in JV Company				0	$ 8,737
Facility in Liangjiang New Area of Chongqing (the 'Joint Venture')
Schedule of Equity Method Investments [Line Items]
Interest rate to concontrolling interest if joint venture is early terminated and liquidated			10.00%
Parent Company | Facility in Liangjiang New Area of Chongqing (the 'Joint Venture')
Schedule of Equity Method Investments [Line Items]
Percent ownership in joint venture			51.00%
Chongqing Funds | Facility in Liangjiang New Area of Chongqing (the 'Joint Venture')
Schedule of Equity Method Investments [Line Items]
Percent ownership in joint venture			49.00%
Corporate Joint Venture
Schedule of Equity Method Investments [Line Items]
Total price payable under EPC Contract										¥ 540,000,000	$ 78,000
Contractual Obligation, Payment						¥ 358,900,000	$ 57,000
Contract amount payable in calendar year 2018						¥ 181,100,000			$ 28,800
Corporate Joint Venture | Facility in Liangjiang New Area of Chongqing (the 'Joint Venture')
Schedule of Equity Method Investments [Line Items]
Initial capitalization of joint venture												$ 330,000
Purchases of land use rights in JV Company		$ 8,700
Corporate Joint Venture | Design Fees
Schedule of Equity Method Investments [Line Items]
Total price payable under EPC Contract										19,500,000	2,800
Corporate Joint Venture | Construction and Procurement Fees
Schedule of Equity Method Investments [Line Items]
Total price payable under EPC Contract										¥ 520,500,000	$ 75,200
Noncontrolling Interest
Schedule of Equity Method Investments [Line Items]
Proceeds from investment by noncontrolling interest	$ 42,000			$ 128,994				$ 162,000