Debt Arrangements - Additional Information (Detail)										1 Months Ended						12 Months Ended						72 Months Ended
		Jun. 01, 2016 USD ($)	Apr. 04, 2016 USD ($)	Mar. 07, 2016 USD ($)	Mar. 18, 2013 USD ($) d $ / shares shares	Mar. 13, 2013 USD ($) $ / shares shares	Mar. 12, 2013 $ / shares	Nov. 29, 2012 USD ($)	May 23, 2011 USD ($)	Jan. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Apr. 30, 2016 USD ($)	Feb. 28, 2015 USD ($)	Jul. 31, 2014 USD ($)	Mar. 31, 2013 USD ($)	Dec. 31, 2016 USD ($) shares	Dec. 31, 2015 USD ($) shares	Dec. 31, 2014 USD ($) shares	Dec. 31, 2013 USD ($) shares	Dec. 31, 2012 USD ($) shares	Dec. 31, 2011 USD ($) shares	Dec. 31, 2016 USD ($) shares	Jul. 31, 2016 USD ($)	Jun. 30, 2016 USD ($)	Jan. 07, 2016 $ / shares	Jun. 21, 2013 USD ($)
Debt Instrument [Line Items]
Net proceeds received from issuance of debt																$ 300,000,000
Payments of securitized financing transaction																35,754,000	$ 496,000
Payment for the acquisition of Brand																427,000	438,000	$ 915,000
Payment of long-term debt																253,490,000	61,124,000	62,856,000
Current portion of long-term debt											$ 160,435,000					160,435,000	61,123,000					$ 160,435,000
Restricted cash											177,269,000					177,269,000	49,544,000					177,269,000
Long term debt	[1]										1,254,160,000					1,254,160,000	1,449,392,000					$ 1,254,160,000
Non cash additional interest expense on convertible notes																21,745,000	$ 31,455,000	$ 29,616,000
Debt instrument, cash paid to repurchase convertible notes																178,973,000
Repurchase of equity portion of convertible notes																1,164,000
Number of shares repurchased | shares																	360,000	4,994,578	15,812,566	7,185,257	1,150,000	29,502,401
Cost of shares repurchased																5,153,000	$ 12,391,000	$ 193,434,000	$ 436,419,000	$ 125,341,000	$ 19,138,000	$ 786,723,000
Loss on extinguishment of debt																(5,903,000)
Minimum
Debt Instrument [Line Items]
Selling price per share of common stock | $ / shares																									$ 4.53
Maximum
Debt Instrument [Line Items]
Selling price per share of common stock | $ / shares																									$ 59.08
MG Icon
Debt Instrument [Line Items]
Equity ownership percentage								50.00%
Peanuts Worldwide
Debt Instrument [Line Items]
Joint venture ownership percentage								80.00%
Hardy Way
Debt Instrument [Line Items]
Joint venture ownership percentage								85.00%
Zoo York brand
Debt Instrument [Line Items]
Ownership Percentage								100.00%
IBG Borrower
Debt Instrument [Line Items]
Equity ownership percentage				35.00%
Termination of license generating with minimum royalty guarantees											5,000,000					$ 5,000,000						5,000,000
Premium percentage of aggregate principal amount first two years loan				3.00%
Premium percentage of aggregate principal amount third year loan				3.00%
Premium percentage of aggregate principal amount fourth year loan				1.00%
IBG Borrower | Minimum
Debt Instrument [Line Items]
Asset coverage ratio, minimum				1.25%
IBG Borrower | Maximum
Debt Instrument [Line Items]
Leverage ratio				4.50%
Ice Cream Trademarks
Debt Instrument [Line Items]
Equity ownership percentage																										50.00%
2012 Senior Secured Notes
Debt Instrument [Line Items]
Principal amount of long term debt								$ 600,000,000
Debt instrument, interest rate, stated percentage								4.229%
Debt instrument, quarterly payment								$ 10,500,000
Debt instrument, frequency of payment																quarterly
Excess interest rate on original interest rate								3.40%
Proceeds from issuance of debt instrument								$ 150,400,000
Payments of securitized financing transaction								20,900,000
2012 Senior Secured Notes | Umbro
Debt Instrument [Line Items]
Payment for the acquisition of Brand								218,300,000
Class A Variable Funding Note
Debt Instrument [Line Items]
Principal amount of long term debt								100,000,000
Variable Funding Notes
Debt Instrument [Line Items]
Net proceeds received from issuance of debt													$ 100,000,000
Commitment fee on the unused portion of the variable funding notes facility													0.50%
Debt Instrument anticipated repayment year and month													2018-01
Additional interest rate													5.00%
Long term debt											100,000,000					$ 100,000,000	100,000,000					100,000,000
2013 Senior Secured Notes
Debt Instrument [Line Items]
Principal amount of long term debt																										$ 275,000,000
Debt instrument, interest rate, stated percentage																										4.352%
Debt instrument, quarterly payment								$ 4,800,000
Debt instrument, frequency of payment																quarterly
Excess interest rate on original interest rate								3.14%
Payments of securitized financing transaction								$ 7,200,000
Senior Secured Notes
Debt Instrument [Line Items]
Principal amount of long term debt											751,800,000					$ 751,800,000	812,900,000					751,800,000
Debt Instrument anticipated repayment year and month								2020-01
Additional interest rate								5.00%
Debt instrument, Maturity Date								2043-01
Debt instrument description of interest																If the Co-Issuers have not repaid or refinanced the Senior Secured Notes prior to the anticipated repayment date, additional interest will accrue on the Senior Secured Notes equal to the greater of (A) 5% per annum and (B) a per annum interest rate equal to the excess, if any, by which the sum of (i) the yield to maturity (adjusted to a quarterly bond-equivalent basis), on the anticipated repayment date of the United States treasury security having a term closest to 10 years plus (ii) 5% plus (iii) with respect to the 2012 Senior Secured Notes, 3.4%, or with respect to the 2013 Senior Secured Notes, 3.14%, exceeds the original interest rate.
Anticipated repayment date								10 years
Payment of long-term debt														$ 1,600,000
Current portion of long-term debt											95,300,000					$ 95,300,000	95,300,000					95,300,000
Restricted cash											112,400,000					112,400,000	48,700,000					112,400,000
Cash interest expense for convertible notes																33,600,000	34,800,000	$ 35,200,000
Long term debt											651,784,000					651,784,000	$ 712,907,000					651,784,000
Convertible Notes | 1.50% Senior Subordinated Notes Due March 15, 2018
Debt Instrument [Line Items]
Principal amount of long term debt					$ 400,000,000						$ 295,100,000					$ 295,100,000						$ 295,100,000
Debt instrument, interest rate, stated percentage					1.50%						1.50%					1.50%	1.50%	1.50%				1.50%
Net proceeds received from issuance of debt					$ 390,600,000
Cash interest expense for convertible notes																$ 5,200,000	$ 6,000,000	$ 6,000,000
Debt instrument, maturity date					Mar. 15, 2018
Debt instrument, payment terms																The 1.50% Convertible Notes bear interest at an annual rate of 1.50%, payable semi-annually in arrears on March 15 and September 15 of each year, beginning on September 15, 2013
Debt instrument, effective interest rate					6.50%
Debt instrument, conversion rate					32.4052
Principal amount of each convertible note					$ 1,000
Convertible notes, initial conversion price per share | $ / shares					$ 30.86
Long term debt	[2]										$ 277,518,000					$ 277,518,000	357,453,000					$ 277,518,000
Non cash additional interest expense on convertible notes																14,600,000	16,200,000	$ 15,300,000
Debt instrument, par value of notes repurchased											104,900,000					104,900,000						104,900,000	$ 53,200,000	$ 51,700,000
Debt instrument, cash paid to repurchase convertible notes																36,700,000
Debt instrument, gain (loss) on repurchase of convertible notes																9,600,000
Repurchase of equity portion of convertible notes																1,200,000
Number of shares repurchased | shares					2,964,000
Cost of shares repurchased					$ 69,000,000
Sold warrants, shares of common stock | shares						13,000,000
Sold warrants, shares of common stock strike price per share | $ / shares						$ 35.5173
Sold warrants, shares of common stock exercise date						Jun. 18, 2018
Sold warrants, shares of common stock expiring date						Sep. 01, 2018
Proceeds received from sale of sold warrants						$ 57,700,000
Adjustments to additional paid in capital due convertible note hedge and warrants															$ 3,000,000
Convertible notes, warrant strike price | $ / shares							$ 35.5173
Percentage of premiums							52.50%
Selling price per share of common stock | $ / shares							$ 23.29
Convertible Notes | 1.50% Senior Subordinated Notes Due March 15, 2018 | Long | Call Option
Debt Instrument [Line Items]
Convertible notes, common stock option shares | shares					13,000,000
Payment for the purchased call option						84,100,000
Deferred income tax related to convertible notes						$ 29,400,000					$ 5,600,000					$ 5,600,000	$ 13,000,000					$ 5,600,000
Convertible Notes | 1.50% Senior Subordinated Notes Due March 15, 2018 | Common Stock
Debt Instrument [Line Items]
Debt instrument, shares issued to repurchase convertible notes | shares																7,400,000
Convertible Notes | 1.50% Senior Subordinated Notes Due March 15, 2018 | Scenario 1
Debt Instrument [Line Items]
Debt instrument, convertible, threshold trading days | d					20
Debt instrument, convertible, threshold consecutive trading days					30 days
Debt instrument, redemption price, percentage																100.00%
Debt instrument, redemption, description																price equal to 100% of the principal amount of the 1.50% Convertible Notes, plus accrued and unpaid interest, if any
Convertible Notes | 1.50% Senior Subordinated Notes Due March 15, 2018 | Scenario 2
Debt Instrument [Line Items]
Debt instrument, convertible, threshold trading days | d					5
Debt instrument, convertible, threshold consecutive trading days					5 days
Convertible Notes | 1.50% Senior Subordinated Notes Due March 15, 2018 | Minimum
Debt Instrument [Line Items]
Percentage of closing price to trigger debt conversion					130.00%
Convertible Notes | 1.50% Senior Subordinated Notes Due March 15, 2018 | Maximum
Debt Instrument [Line Items]
Percentage of closing price to trigger debt conversion					98.00%
Convertible Notes | 2.50% Senior Subordinated Notes Due June 2016
Debt Instrument [Line Items]
Principal amount of long term debt									$ 300,000,000
Debt instrument, interest rate, stated percentage			2.50%						2.50%		2.50%					2.50%	2.50%	2.50%				2.50%
Net proceeds received from issuance of debt									$ 291,600,000
Cash interest expense for convertible notes																$ 3,000,000	$ 7,500,000	$ 7,500,000
Debt instrument, maturity date																Jun. 01, 2016
Long term debt	[3]																294,048,000
Non cash additional interest expense on convertible notes																$ 4,500,000	12,700,000	$ 11,900,000
Debt instrument, par value of notes repurchased												$ 143,900,000
Debt instrument, cash paid to repurchase convertible notes												$ 145,600,000
Debt instrument, gain (loss) on repurchase of convertible notes																(1,200,000)
Repayment of remaining outstanding balance of convertible notes upon maturity		$ 156,100,000
Senior Secured Term Loan
Debt Instrument [Line Items]
Principal amount of long term debt				$ 300,000,000							$ 263,700,000					263,700,000						$ 263,700,000
Cash interest expense for convertible notes																25,600,000	$ 0
Debt instrument, maturity date				Mar. 07, 2021
Long term debt	[4]										244,906,000					244,906,000						244,906,000
Margin applied to LIBOR				10.00%
Net proceeds received from issuance of debt			$ 264,200,000
Percentage of principal debt amortization				5.00%
Asset coverage ratio, minimum				165.00%
Interest rate increase additional per annum				3.00%
Payment of unpaid principal and accrued interest of lenders				50.00%
Debt instrument, annual principal prepayment											28,700,000					28,700,000						28,700,000
Premium prepayment of aggregate principal amount											4,300,000
Debt issue discount costs											2,100,000
Deferred financing costs											1,000,000					1,000,000						1,000,000
Loss on extinguishment of debt											7,400,000
Senior Secured Term Loan | Subsequent Event
Debt Instrument [Line Items]
Voluntary prepayment amount										$ 23,000,000
Additional mandatory prepayment amount										23,500,000
Voluntary prepayment premium										3,400,000
Additional mandatory prepayment premium										$ 3,400,000
Senior Secured Term Loan | Accounts Payable And Accrued Liabilities
Debt Instrument [Line Items]
Accrued Expenses											$ 6,800,000					6,800,000						$ 6,800,000
Senior Secured Term Loan | Loss on Extinguishment of Debt
Debt Instrument [Line Items]
Loss on extinguishment of debt																$ 6,800,000
Senior Secured Term Loan | LIBOR
Debt Instrument [Line Items]
LIBOR floor				1.50%
Senior Secured Term Loan | IBG Borrower
Debt Instrument [Line Items]
Percentage of principal debt amortization				25.00%
Asset coverage ratio, minimum				1.25%
Principals of debt amortization terms																Borrowings under the Senior Secured Term Loan amortize yearly at 5% of principal as long as the applicable asset coverage ratio, as defined in the Credit Agreement, remains greater than or equal to 1.65:1.00 as of the end of each fiscal quarter and IBG Borrower timely delivers a compliance certificate to Cortland after each fiscal quarter. If IBG Borrower’s asset coverage ratio measured as of the end of a certain fiscal quarter is 1.25:1.00 or greater but less than 1.45:1.00, or 1.45:1.00 or greater but less than 1.65:1.00, IBG Borrower will be obligated to pay during the subsequent quarter amortization at 25% per annum, or 15% per annum, respectively. IBG Borrower will also pay amortization at 25% per annum if it fails to timely deliver a compliance certificate to Cortland after each fiscal quarter.
Asset coverage ratio, maximum - Range one				1.45%
Asset coverage ratio, minimum - Range two				1.45%
Asset coverage ratio, maximum - Range two				1.65%
Percentage of principal debt amortization - Range two				15.00%
Percentage of principal debt amortization on default				25.00%

[1] Carrying amounts include aggregate unamortized debt discount and debt issuance costs.

[2] During FY 2016, the Company repurchased a total of $104.9 million par value (of which $51.7 million and $53.2 million were purchased in June 2016 and July 2016, respectively) of the 1.50% Convertible Notes. See below for further details.

[3] In April 2016, the Company repurchased $143.9 million par value of the 2.50% Convertible Notes. Upon maturity of the notes on June 1, 2016, the Company repaid the remaining outstanding balance of $156.1 million in cash. See below for further details.

[4] In December 2016, the Company made a mandatory principal prepayment of $28.7 million on its Senior Secured Term Loan. See below for further details.