Long-Term Debt (Narrative) (Details) - USD ($)				1 Months Ended	3 Months Ended
	Aug. 07, 2018	Jul. 02, 2016	Jul. 02, 2016	Mar. 31, 2017	Mar. 31, 2019	Sep. 30, 2018	Dec. 31, 2018	Dec. 10, 2018	Jul. 01, 2016
Disclosure Long Term Debt Additional Information [Line Items]
Long-term debt					$ 605,037,000		$ 610,787,000
Derivative, maturing in 2021					150,000,000
Derivative, maturing in 2022					150,000,000
Interest Rate Cap [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Derivative, notional amount					$ 300,000,000
Interest Rate Swap [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Derivative, notional amount							$ 300,000,000	$ 300,000,000
BoA Credit Agreement [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument period of credit agreement	5 years
Proceeds from issuance of long-term debt		$ 335,000,000	$ 287,500,000
Long-term debt									$ 258,000,000
Debt instrument covenant payment percentage of intellectual property disposed liquidation value					50.00%
Debt instrument covenant payment percentage of net proceeds related to other assets constituting collateral					100.00%
Debt instrument orderly liquidation value of registered trademarks percentage benchmark					15.00%
Debt instrument, covenant description					(i) maintain a positive net income, (ii) satisfy a maximum loan to value ratio initially set at 50.0% (applicable to the Amended Revolving Loans and Amended Tranche A Loans) decreasing over the term of the New Amended BoA Credit Agreement until reaching a final maximum loan to value ratio of 42.5% and (iii) satisfy a maximum consolidated first lien leverage ratio, initially set at 3.875:1:00, decreasing over the term of the New Amended BoA Credit Agreement until reaching a final maximum ratio of 2.875:1.00 for the fiscal quarter ending September 30, 2022 and thereafter.
Quarterly amortization installments					$ 5,000,000
Debt instrument, description					(i) the loans outstanding under the New Amended BoA Credit Agreement plus, (a) where intellectual property is disposed, 50.0% of the disposed intellectual property's orderly liquidation value, and (b) where any other assets constituting collateral are disposed or upon the receipt of certain insurance proceeds, 100% of the net proceeds thereof, subject to certain reinvestment rights; and (ii) the Amended Tranche A-1 Loans to the extent that the outstanding principal amount thereof exceeds 15.0% of the orderly liquidation value of the registered trademarks owned by the BoA Facility Loan Parties.
Debt instrument, covenant compliance					At March 31, 2019, the Company is in compliance with the covenants included in the New Amended BoA Credit Agreement.
Line of credit facility, covenant terms					The Amended BoA Credit Agreement contained customary representations and warranties and customary affirmative and negative covenants applicable to the BoA Facility Loan Parties and their subsidiaries. Moreover, the Amended BoA Credit Agreement contained financial covenants that required the BoA Facility Loan Parties and their subsidiaries to (i) maintain a positive net income (as defined in the agreement), (ii) satisfy a maximum loan to value ratio set at 50.0% (applicable to the Revolving Loans and Tranche A Loans) and (iii) satisfy a maximum consolidated first lien leverage ratio, initially set at 2.80:1.00, decreasing over the term of the Amended BoA Credit Agreement until reaching the final maximum ratio of 2.50:1.00 for the fiscal quarter ended September 30, 2018 and thereafter
BoA Credit Agreement [Member] | Revolving Credit Facility [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Line of credit facility, maximum borrowing capacity									110,000,000
Line of credit facility, unused capacity, commitment fee percentage					0.375%
Debt instrument increase conditions					The Company could have requested an increase in (i) the Revolving Credit Facility and Tranche A Loans, as would not have caused the consolidated first lien leverage ratio, determined on a pro forma basis after giving effect to any such increase, to exceed 2.33:1.00 and (ii) the Tranche A-1 Loans, as would not have caused the consolidated first lien leverage ratio, determined on a pro forma basis after giving effect to any such increase, to exceed (a) with respect to any increase, the proceeds of which will be used solely to finance an acquisition, 2.50:1.00 and (b) with respect to any other increase, 2.40:1.00, subject to the satisfaction of certain conditions in the Amended BoA Credit Agreement
Long-term Line of Credit									80,500,000
BoA Credit Agreement [Member] | Tranche A -1 Term Loans [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, face amount									44,500,000
Long-term debt									44,500,000
BoA Credit Agreement [Member] | Tranche A -1 Term Loans [Member] | London Interbank Offered Rate (LIBOR) [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, basis spread on variable rate					7.00%
BoA Credit Agreement [Member] | Tranche A -1 Term Loans [Member] | Base Rate [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, basis spread on variable rate					6.00%
BoA Credit Agreement [Member] | Tranche A [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, face amount									133,000,000
Long-term debt									133,000,000
BoA Credit Agreement [Member] | Tranche A [Member] | London Interbank Offered Rate (LIBOR) [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, basis spread on variable rate					3.50%
BoA Credit Agreement [Member] | Tranche A [Member] | Base Rate [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, basis spread on variable rate					2.50%
BoA Term Loans [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, periodic payment					$ 5,000,000
Debt instrument, date of first required payment					Sep. 30, 2016
Tranche A [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Maximum loan to value ratio					50.00%
Tranche A [Member] | Revolving Credit Facility [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Consolidated first lien leverage ratio					2.80%
Line of credit facility, covenant terms					(i) the Revolving Credit Facility and Tranche A Loans as would not cause the consolidated first lien leverage ratio, determined on a pro forma basis after giving effect to any such increase, to exceed 2.80:1.00 and (ii) the Tranche A-1 Loans, as would not cause the consolidated first lien leverage ratio, determined on a pro forma basis after giving effect to any such increase, to exceed (a) with respect to any increase, the proceeds of which will be used solely to finance an acquisition, 3.00:1.00 and (b) with respect to any other increase, 2.90:1.00, subject to the satisfaction of certain conditions in the New Amended BoA Credit Agreement.
Revolving Loans [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Long-term debt									115,000,000
Maximum loan to value ratio					50.00%
Revolving Loans [Member] | Notes Payable to Banks [Member] | London Interbank Offered Rate (LIBOR) [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, basis spread on variable rate					3.50%
GSO Credit Agreement [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, covenant description					(a) in the event the consolidated total leverage ratio was at least 4.00:1.00, 75% thereof, (b) in the event the consolidated total leverage ratio was less than 4.00:1.00 but at least 3.00:1.00, 50% thereof and (c) in the event the consolidated total leverage ratio was less than 3.00:1.00, 0% thereof. The loans under the New Amended FS/KKR Credit Agreement will continue to amortize in quarterly installments of approximately $2.1 million.
Line of credit facility, interest rate description					(i) the LIBOR rate plus 8.75% per annum or (ii) the base rate plus 7.75% per annum.
Debt instrument, covenant compliance					At March 31, 2019, the Company is in compliance with the covenants included in the New Amended FS/KKR Credit Agreement.
Line of credit facility, covenant terms					The Amended FS/KKR Credit Agreement contained customary representations and warranties and customary affirmative and negative covenants applicable to the FS/KKR Facility Loan Parties and their subsidiaries. Moreover, the Amended FS/KKR Credit Agreement contained financial covenants that required the FS/KKR Facility Loan Parties and their subsidiaries to satisfy (i) a maximum consolidated total leverage ratio, initially set at 7.25:1.00, decreasing over the term of the Amended FS/KKR Credit Agreement until reaching the final maximum ratio of 6.50:1.00 for the fiscal quarter ended September 30, 2018 and thereafter and (ii) a maximum consolidated first lien leverage ratio, initially set at 2.80:1.00, decreasing over the term of the Amended FS/KKR Credit Agreement until reaching the final maximum ratio of 2.50:1.00 for the fiscal quarter ended September 30, 2018 and thereafter
GSO Credit Agreement Reinvestment Rights Scenario Three [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument covenant payment percentage of net proceeds related to other assets constituting collateral					0.00%
Amended KKR Credit Agreement [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Line of credit facility, maximum borrowing capacity									415,000,000
Debt instrument increase conditions					The Company could have requested one or more additional term loan facilities or the increase of term loan commitments under the Amended FS/KKR Credit Agreement as would not have caused the consolidated total leverage ratio, determined on a pro forma basis after giving effect to any such addition and increase, to have exceeded 6.00:1.00, subject to the satisfaction of certain conditions in the Amended FS/KKR Credit Agreement
Amended KKR Credit Agreement [Member] | Scenario Plan One [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument covenant payment percentage of net proceeds related to other assets constituting collateral					75.00%
Amended KKR Credit Agreement [Member] | Scenario Plan Two [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument covenant payment percentage of net proceeds related to other assets constituting collateral					50.00%
Amended FS/KKR Credit Agreement [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Percent of disposed intellectual property for mandatory prepayment					50.00%
Percent of assets disposed of other than intellectual property for mandatory prepayment					100.00%
Annual amortization as a percent of original aggregate principal				2.00%
Amended FS/KKR Credit Agreement [Member] | Scenario Plan One [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Percent of consolidated excess cash flow for mandatory prepayment					75.00%
Amended FS/KKR Credit Agreement [Member] | Scenario Plan Two [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Percent of consolidated excess cash flow for mandatory prepayment					50.00%
Amended FS/KKR Credit Agreement [Member] | Scenario Plan Three [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Percent of consolidated excess cash flow for mandatory prepayment					0.00%
Amended FS/KKR Credit Agreement [Member] | Scenario Plan Four [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Consolidated total leverage ratio					6.00%
FS/KKR Credit Agreement [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, face amount									314,000,000
Debt instrument, periodic payment	$ 2,100,000
Debt instrument consolidated total leverage ratio					6.00%
FS/KKR Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, basis spread on variable rate					8.75%
FS/KKR Credit Agreement [Member] | Base Rate [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, basis spread on variable rate					7.75%
New Amended FS/KKR Credit Agreement [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument covenant payment percentage of intellectual property disposed liquidation value		50.00%
Debt instrument covenant payment percentage of net proceeds related to other assets constituting collateral		100.00%
Debt instrument, covenant description					(i) a maximum consolidated total leverage ratio, initially set at 7.25:1.00, decreasing over the term of the New Amended FS/KKR Credit Agreement until reaching a final maximum ratio of 6.25:1.00 for the fiscal quarter ending September 30, 2022 and thereafter and (ii) a maximum consolidated first lien leverage ratio, initially set at 3.875:1.00, decreasing over the term of the New Amended FS/KKR Credit Agreement until reaching a final maximum ratio of 2.875:1.00 for the fiscal quarter ending September 30, 2022 and thereafter
New Amended FS/KKR Credit Agreement [Member] | Scenario Plan One [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Consolidated first lien leverage ratio					3.875%
Final consolidated total leverage ratio					7.25%
New Amended FS/KKR Credit Agreement [Member] | Scenario Plan Two [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Consolidated first lien leverage ratio					2.875%
Final consolidated total leverage ratio					6.25%
New Amended FS/KKR Credit Agreement [Member] | Additional Loan Facility [Member] | Scenario Plan Three [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Consolidated total leverage ratio					6.00%
Third Amended BoA Credit Agreement [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Long-term debt									335,000,000
Amended BoA Revolving Credit Commitments [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Line of credit facility, maximum borrowing capacity									130,000,000
Line of credit facility, unused capacity, commitment fee percentage					0.375%
Maximum loan to value ratio					50.00%
Consolidated first lien leverage ratio	3.875%
Final consolidated first lien leverage ratio	2.875%
Percent of disposed intellectual property for mandatory prepayment					50.00%
Percent of assets disposed of other than intellectual property for mandatory prepayment					100.00%
Amended BoA Revolving Credit Commitments [Member] | Scenario Plan Two [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Final consolidated first lien leverage ratio						2.50%
Third Amended BoA Tranche A-1 Loans [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, face amount									70,000,000
Long-term debt									70,000,000
Third Amended BoA Tranche A-1 Loans [Member] | London Interbank Offered Rate (LIBOR) [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, basis spread on variable rate					7.00%
Third Amended BoA Tranche A-1 Loans [Member] | Base Rate [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, basis spread on variable rate					6.00%
Amended BoA Revolving Loans and Amended Tranche A Loans [Member] | London Interbank Offered Rate (LIBOR) [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, basis spread on variable rate					3.50%
Amended BoA Revolving Loans and Amended Tranche A Loans [Member] | Base Rate [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, basis spread on variable rate					2.50%
Third Amended BoA Tranche A Loans [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, face amount									150,000,000
Long-term debt									$ 150,000,000
New Amended BoA Credit Agreement [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Consolidated first lien leverage ratio					2.90%
Amended FS/KKR Covenant Requirements - GSO Facility Loan Parties [Member] | Scenario Plan One [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Consolidated first lien leverage ratio					7.25%
Final consolidated first lien leverage ratio					6.50%
Amended FS/KKR Covenant Requirements - GSO Facility Loan Parties [Member] | Scenario Plan Two [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Consolidated first lien leverage ratio					2.80%
Final consolidated first lien leverage ratio					2.50%
Maximum [Member] | Tranche A -1 Term Loans [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument orderly liquidation value of registered trademarks percentage benchmark					10.00%
Maximum [Member] | Tranche A [Member] | Scenario Plan One [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Consolidated first lien leverage ratio					2.80%
Maximum [Member] | Tranche A -1 Term Loans [Member] | Scenario Plan One [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Consolidated first lien leverage ratio					2.50%
Maximum [Member] | Tranche A -1 Term Loans [Member] | Scenario Plan Two [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Consolidated first lien leverage ratio					2.40%
Maximum [Member] | Amended KKR Credit Agreement [Member] | Scenario Plan Two [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument consolidated total leverage ratio					4.00%
Maximum [Member] | Amended KKR Credit Agreement [Member] | Scenario Plan Three [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument consolidated total leverage ratio					3.00%
Maximum [Member] | Amended KKR Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, basis spread on variable rate					9.00%
Maximum [Member] | Amended KKR Credit Agreement [Member] | Base Rate [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, basis spread on variable rate					8.00%
Maximum [Member] | Amended FS/KKR Credit Agreement [Member] | Scenario Plan Two [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Consolidated total leverage ratio					4.00%
Maximum [Member] | Amended FS/KKR Credit Agreement [Member] | Scenario Plan Three [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Consolidated total leverage ratio					3.00%
Maximum [Member] | Amended FS/KKR Credit Agreement [Member] | Scenario Plan Four [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Consolidated total leverage ratio					6.00%
Maximum [Member] | Third Amended BoA Credit Agreement [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Maximum loan to value ratio	42.50%
Maximum [Member] | Third Amended BoA Tranche A-1 Loans [Member] | London Interbank Offered Rate (LIBOR) [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, basis spread on variable rate	6.00%
Maximum [Member] | Third Amended BoA Tranche A-1 Loans [Member] | Base Rate [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, basis spread on variable rate	5.00%
Maximum [Member] | Amended BoA Revolving Loans and Amended Tranche A Loans [Member] | London Interbank Offered Rate (LIBOR) [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, basis spread on variable rate	3.00%
Maximum [Member] | Amended BoA Revolving Loans and Amended Tranche A Loans [Member] | Base Rate [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, basis spread on variable rate	2.00%
Maximum [Member] | Revolving Credit Facility and Tranche A Loans [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Consolidated first lien leverage ratio					2.33%
Minimum [Member] | Tranche A -1 Term Loans [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Consolidated first lien leverage ratio					3.00%
Minimum [Member] | Amended KKR Credit Agreement [Member] | Scenario Plan One [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument consolidated total leverage ratio					4.00%
Minimum [Member] | Amended KKR Credit Agreement [Member] | Scenario Plan Three [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument consolidated total leverage ratio					3.00%
Minimum [Member] | Amended KKR Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, basis spread on variable rate					8.25%
Minimum [Member] | Amended KKR Credit Agreement [Member] | Base Rate [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Debt instrument, basis spread on variable rate					7.25%
Minimum [Member] | Amended FS/KKR Credit Agreement [Member] | Scenario Plan One [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Consolidated total leverage ratio					4.00%
Minimum [Member] | Amended FS/KKR Credit Agreement [Member] | Scenario Plan Two [Member]
Disclosure Long Term Debt Additional Information [Line Items]
Consolidated total leverage ratio					3.00%