Commitments And Contingencies (Details)
Mar. 31, 2018
|Commitments and Contingencies Disclosure [Abstract]|
|Inventory purchase obligations||$ 614,918,000|
Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).
Reference 1: http://www.xbrl.org/2003/role/presentationRef