Long-term Debt and Line of Credit Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Aug. 05, 2015
Debt Instrument [Line Items]
Principal current	$ 19,813,000	$ 12,459,000
Principal	104,563,000	110,647,000
Deferred Finance Costs, current	(625,000)	(455,000)
Deferred Issuance Costs	(3,298,000)	(4,038,000)
Net Value, current	19,188,000	12,004,000
Long-term Debt, Excluding Current Maturities	82,077,000	94,605,000
Total debt	101,265,000	106,609,000
Hedging Liabilities, Noncurrent	382,000	145,000
Debt issuance cost	4,500,000
Debt issuance expense	$ 500,000
Line of Credit
Debt Instrument [Line Items]
Stated interest rate			4.75%
Debt, weighted average interest rate	3.35%
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Principal current	$ 8,000,000	4,021,000
Deferred Finance Costs, current	(252,000)	(147,000)
Net Value, current	$ 7,748,000	3,874,000
Line of credit facility, maximum borrowing capacity			$ 50,000,000
Stated interest rate	3.13%
Term Loan | Line of Credit
Debt Instrument [Line Items]
Total debt	$ 96,563,000
Line of credit facility, maximum borrowing capacity	135,000,000		$ 135,000,000
Term loan-current | Loans Payable
Debt Instrument [Line Items]
Principal current	11,813,000	8,438,000
Deferred Finance Costs, current	(373,000)	(308,000)
Net Value, current	11,440,000	8,130,000
Term loan-long-term | Loans Payable
Debt Instrument [Line Items]
Principal, long-term	84,750,000	98,188,000
Deferred Issuance Costs, long-term	(2,673,000)	(3,583,000)
Long-term Debt, Excluding Current Maturities	82,077,000	94,605,000
Long-term Debt | Accounting Standards Update 2015-03
Debt Instrument [Line Items]
Deferred Issuance Costs	(2,700,000)	(3,600,000)
Short-term Debt | Accounting Standards Update 2015-03
Debt Instrument [Line Items]
Deferred Issuance Costs	$ (600,000)	$ (500,000)