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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 |  |  |  |

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