Accounting Policies and Basis of Presentation - Debt (Details) - USD ($)	Feb. 27, 2015	Sep. 30, 2015	Dec. 31, 2014
Line of Credit Facility [Line Items]
Loan fees in other assets		$ 1,923,000	$ 2,100,000
Outstanding borrowings under credit facility		26,405,000
Credit facility, remaining borrowing capacity		$ 33,550,000
Average interest rate		3.04%
Revolver borrowings [Member]
Line of Credit Facility [Line Items]
Outstanding borrowings under credit facility		$ 19,901,000
Fixed asset sub-line term loan [Member]
Line of Credit Facility [Line Items]
Outstanding borrowings under credit facility		6,504,000
Second Amended and Restated Credit Agreement [Member]
Line of Credit Facility [Line Items]
Debt instrument, term	5 years
Maximum borrowing capacity	$ 80,000,000
Unamortized loan fees		348,000
Loan fees in other assets		675,000
Current borrowing capacity		$ 59,955,000