Long-Term Debt, Line of Credit and Term Loan (Details) - USD ($)			3 Months Ended
	Apr. 21, 2017	Aug. 04, 2016	Mar. 31, 2017	Dec. 31, 2016	Jun. 08, 2012
Line of Credit Facility [Line Items]
Long term debt outstanding			$ 207,298,000	$ 210,343,000
Long-term debt			60,196,000	$ 164,297,000
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Availability under the revolving credit facility under most restrictive covenant			$ 104,300,000
Prior Credit Agreement [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Unused commitment fee percentage			0.30%
Prior Credit Agreement [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Unused commitment fee percentage			0.50%
Prior Credit Agreement [Member] | Federal Funds Rate [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate			0.50%
Prior Credit Agreement [Member] | LIBOR [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate			1.00%
Prior Credit Agreement [Member] | LIBOR [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Margin rate			1.75%
Prior Credit Agreement [Member] | LIBOR [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Margin rate			3.00%
Prior Credit Agreement [Member] | Base Rate [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Margin rate			0.75%
Prior Credit Agreement [Member] | Base Rate [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Margin rate			2.00%
Prior Credit Agreement [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Initiation date			Jun. 08, 2012
Maximum borrowing capacity					$ 125,000,000
Expiration date			Jun. 08, 2017
Prior Credit Agreement [Member] | Letters of Credit Sub Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity					75,000,000
Prior Credit Agreement [Member] | Swingline Sub Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity					20,000,000
Prior Credit Agreement [Member] | Term Loan Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity					200,000,000
Amount outstanding					55,000,000
Prior Credit Agreement [Member] | Uncommitted Incremental Accordion Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity					$ 100,000,000
Eighth Amendment to Prior Credit Agreement [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Expiration date			Jun. 08, 2018
Revolving commitments amount		$ 45,300,000
Eighth Amendment to Prior Credit Agreement [Member] | Term Loan Facility [Member]
Line of Credit Facility [Line Items]
Maturity date			Jun. 08, 2018
Long term debt outstanding		25,400,000
Eighth Amendment to Prior Credit Agreement [Member] | Term Loan Facility [Member] | Remaining Quarters Prior to Maturity [Member]
Line of Credit Facility [Line Items]
Periodic principal payment		$ 5,000,000
Periodic principal payment as percentage of aggregate principal amount		2.50%
Credit Agreement [Member]
Line of Credit Facility [Line Items]
Long-term debt			$ 37,300,000
Credit Agreement [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Initiation date	Apr. 21, 2017
Maturity date	Apr. 21, 2022
Credit Agreement [Member] | Minimum [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Unused commitment fee percentage	0.20%
Credit Agreement [Member] | Maximum [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Unused commitment fee percentage	0.50%
Credit Agreement [Member] | Federal Funds Rate [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.50%
Credit Agreement [Member] | LIBOR [Member] | Minimum [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Variable rate basis	0.00%
Margin rate	1.50%
Credit Agreement [Member] | LIBOR [Member] | Maximum [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Margin rate	2.75%
Credit Agreement [Member] | One-Month LIBOR [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.00%
Credit Agreement [Member] | Base Rate [Member] | Minimum [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Margin rate	0.50%
Credit Agreement [Member] | Base Rate [Member] | Maximum [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Margin rate	1.75%
Credit Agreement [Member] | Revolving Credit Facility [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 100,000,000
Credit Agreement [Member] | Letters of Credit Sub Facility [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity	75,000,000
Credit Agreement [Member] | Swingline Sub Facility [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity	25,000,000
Credit Agreement [Member] | Term Loan Facility A [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Debt instrument, face amount	70,000,000
Credit Agreement [Member] | Term Loan Facility A [Member] | First 12 Quarters Following the Closing [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Periodic principal payment	875,000
Credit Agreement [Member] | Term Loan Facility A [Member] | Remaining Quarters Prior to Maturity [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Periodic principal payment	1,312,500
Credit Agreement [Member] | Delayed Draw Term Loan Facility [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 150,000,000
Credit Agreement [Member] | Delayed Draw Term Loan Facility [Member] | First 12 Quarters Following the Closing [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Periodic principal payment as percentage of aggregate principal amount	1.25%
Credit Agreement [Member] | Delayed Draw Term Loan Facility [Member] | Remaining Quarters Prior to Maturity [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Periodic principal payment as percentage of aggregate principal amount	1.875%
Credit Agreement [Member] | Uncommitted Incremental Accordion Facility [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 100,000,000