Notes Receivable (Details) - USD ($)	1 Months Ended	3 Months Ended		12 Months Ended
	Apr. 30, 2014	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jul. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Long-term purchase commitment, time period		6 years
Pre-tax loss on sale of assets		$ 2,000,000
Proceeds from sale of assets	$ 300,000
Receivable face amount	$ 7,200,000
Receivable term	4 years
Receivable net amount	$ 6,400,000	1,400,000		$ 1,400,000
Proceeds from note receivable		$ 5,800,000		$ 2,000,000	$ 2,000,000	$ 1,750,000
Gain on contract termination			$ 1,600,000
Note Receivable For Contract Termination
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable, face amount							$ 2,000,000.0
Financing receivable, net			$ 1,700,000				$ 1,600,000