Long-Term Debt, Line of Credit and Term Loan (Details) (USD $)	0 Months Ended	3 Months Ended		6 Months Ended
	Jun. 08, 2017	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Line of Credit Facility [Line Items]
Initiation date		Jun. 08, 2012
Maximum borrowing capacity		$ 200,000,000		$ 200,000,000
Credit Facility Expiration date	Jun. 08, 2017
Amount outstanding		105,000,000		105,000,000
Availability under the Revolving Credit Facility under most restrictive covenant		41,300,000		41,300,000
Basis spread on variable rate increased (in hundredths)		0.25%		0.25%
Terms of periodic payments				We are required to repay outstanding revolving loans under the revolving credit facility on June 8, 2017. We are required to repay term loans in quarterly principal installments aggregating (1) 1.250% of the original aggregate principal amount of the term loans during each of the eight quarters beginning with the quarter ended September 30, 2012, (2) 1.875% of the original aggregate principal amount of the term loans during each of the next four quarters beginning with the quarter ending September 30, 2014, and (3) 2.500% of the original aggregate principal amount of the term loans during each of the remaining quarters prior to maturity on June 8, 2017, at which time the entire unpaid principal balance of the term loans is due and payable.
Legal settlement charges		0	0	9,363,000	0
Fifth Amended Credit Agreement [Member]
Line of Credit Facility [Line Items]
Interest rate description		Borrowings under the Fifth Amended Credit Agreement generally bear interest at variable rates based on a margin or spread in excess of either (1) the one-month, two-month, three-month or six-month rate (or with the approval of affected lenders, nine-month or twelve-month rate) for Eurodollar deposits ("LIBOR") or (2) the greatest of (a) the SunTrust Bank prime lending rate, (b) the federal funds rate plus 0.50%, and (c) one-month LIBOR plus 1.00% (the "Base Rate"), as selected by the Company. The LIBOR margin varies between 1.75% and 3.00%, and the Base Rate margin varies between 0.75% and 2.00%, depending on our leverage ratio. On February 5, 2013, we entered into a First Amendment to the Fifth Amended Credit Agreement, which included, among other things, a temporary increase in the LIBOR and Base Rate margins of 0.25%. The increased margins are effective through December 31, 2013 and apply only in the event that our total funded debt to EBITDA ratio is greater than or equal to 3.50 to 1.00.
Line of Credit Facility, Commitment Fee Description		The Fifth Amended Credit Agreement also provides for an annual fee ranging between 0.30% and 0.50% of the unused commitments under the revolving credit facility.
Letters of Credit Sub Facility[Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity		75,000,000		75,000,000
Swingline Sub Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity		20,000,000		20,000,000
Term Loan Facility [Member]
Line of Credit Facility [Line Items]
Maturity date	Jun. 08, 2017
Uncommitted Incremental Accordion Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 200,000,000		$ 200,000,000