Long-Term Debt and Credit Facility (Credit Facility) (Details) - Restated Revolving Credit, Term Loan and Security Agreement			9 Months Ended
	Sep. 30, 2016 USD ($)	May 10, 2013 USD ($)	Sep. 30, 2016 USD ($)
Debt Instrument [Line Items]
Annual limit on capital expenditures			$ 20,000,000
Covenant, Percent of Adjusted EBITDA Which Must Be Prepaid		25.00%
Credit Facility Ceiling Value, Applicable to 25% Of Adjusted EBITDA Which Must Be Paid		$ 3,000,000.0
Covenant, maximum number of days from year end by which prepayment of 25% of adjusted EBITDA is due		60 days
Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 65,000,000	$ 65,000,000.0	65,000,000
Credit facility term	2 years
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 55,000,000	$ 55,000,000	$ 55,000,000
Debt Instrument, Covenant, Undrawn Availability, Affects Fixed Coverage Charge Ratio and Annual Capital Expenditures	$ 15,000,000
Line of Credit | Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Credit facility, financial covenant, fixed charge coverage ratio	1.00
Credit facility, financial covenant, funded debt to adjusted EBITDA ratio			4.0
Line of Credit | Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Credit facility, financial covenant, fixed charge coverage ratio			1.10
Credit facility, financial covenant, funded debt to adjusted EBITDA ratio	5.5
Term loan
Debt Instrument [Line Items]
Face amount	$ 10,000,000		$ 10,000,000