Subsequent Events (Details) - Subsequent Event - USD ($)	Oct. 17, 2017	Oct. 12, 2017
Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Line of credit facility, fair value of amount outstanding		$ 100,000,000.0000000000
JDS Silver Holdings, Ltd.
Subsequent Event [Line Items]
Consideration transferred	$ 200,000,000
Payments to acquire businesses, gross	147,500,000
Equity interests issued and issuable	37,500,000
Consideration transferred, liabilities incurred	15,000,000
Contingent consideration, liability	$ 50,000,000