Debt Arrangements - Additional Information (Detail) (USD $)	9 Months Ended				6 Months Ended						1 Months Ended			3 Months Ended		9 Months Ended					1 Months Ended			1 Months Ended						3 Months Ended			9 Months Ended						1 Months Ended		1 Months Ended							1 Months Ended				1 Months Ended		1 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Jun. 21, 2013	Dec. 31, 2012	Sep. 30, 2013 Variable Funding Notes	Nov. 29, 2012 Class A Variable Funding Note	Nov. 29, 2012 Hardy Way	Nov. 29, 2012 MG Icon	Nov. 29, 2012 Zoo York brand	Nov. 29, 2012 Peanuts Worldwide	Mar. 18, 2013 1.50% Convertible Notes	Mar. 12, 2013 1.50% Convertible Notes	Mar. 13, 2013 1.50% Convertible Notes	Sep. 30, 2013 1.50% Convertible Notes		Sep. 30, 2013 1.50% Convertible Notes		Dec. 31, 2012 1.50% Convertible Notes	Mar. 18, 2013 1.50% Convertible Notes Semi Annual Payment, First Payment	Mar. 18, 2013 1.50% Convertible Notes Semi Annual Payment, Second Payment	Mar. 18, 2013 1.50% Convertible Notes Long Call Option	Mar. 13, 2013 1.50% Convertible Notes Long Call Option	Sep. 30, 2013 1.50% Convertible Notes Long Call Option	Mar. 18, 2013 1.50% Convertible Notes Change of control or other fundamental change	Mar. 18, 2013 1.50% Convertible Notes Accounting change	Mar. 18, 2013 1.50% Convertible Notes Minimum	Mar. 18, 2013 1.50% Convertible Notes Maximum	May 17, 2011 2.50% Convertible Notes	May 23, 2011 2.50% Convertible Notes	Sep. 30, 2013 2.50% Convertible Notes		Sep. 30, 2012 2.50% Convertible Notes	Sep. 30, 2013 2.50% Convertible Notes		Sep. 30, 2012 2.50% Convertible Notes	Dec. 31, 2012 2.50% Convertible Notes	May 23, 2011 2.50% Convertible Notes Semi Annual Payment, First Payment	May 23, 2011 2.50% Convertible Notes Semi Annual Payment, Second Payment	May 23, 2011 2.50% Convertible Notes Long Call Option	Sep. 30, 2013 2.50% Convertible Notes Long Call Option	May 23, 2011 2.50% Convertible Notes Change of control or other fundamental change	May 23, 2011 2.50% Convertible Notes Accounting change	May 23, 2011 2.50% Convertible Notes Minimum	May 23, 2011 2.50% Convertible Notes Maximum	May 30, 2013 Ecko Note	Sep. 30, 2013 Ecko Note	Dec. 31, 2012 Ecko Note	Nov. 29, 2012 Senior Secured Notes	Sep. 30, 2013 Senior Secured Notes	Jun. 21, 2013 Senior Secured Notes	Dec. 31, 2012 Senior Secured Notes	Nov. 29, 2012 Senior Secured Notes Due In Twenty Twelve	Nov. 29, 2012 Senior Secured Notes Due In Twenty Twelve Umbro Limited	Nov. 29, 2012 Senior Secured Notes Due In Two Thousand Thirteen
Debt Instrument [Line Items]
Principal amount of long term debt						$ 100,000,000					$ 400,000,000			$ 400,000,000		$ 400,000,000													$ 300,000,000	$ 300,000,000			$ 300,000,000													$ 90,000,000		$ 600,000,000	$ 852,200,000	$ 275,000,000
Debt instrument, interest rate, stated percentage											1.50%			1.50%		1.50%		1.50%											2.50%	2.50%			2.50%			2.50%										7.50%		4.229%		4.352%
Commitment fee on the unused portion of the variable funding notes facility					0.50%
Debt Instrument anticipated repayment year and month					2018-01																																											2020-01
Additional interest rate					5.00%																																											5.00%
Ownership percentage			50.00%				85.00%	50.00%	100.00%	80.00%
Debt instrument, quarterly payment																																																				10,500,000		4,800,000
Debt instrument, Maturity Date																																																2043-01
Debt instrument description of interest																																																If the Co-Issuers have not repaid or refinanced the Class A-2 Notes prior to the anticipated repayment date, additional interest will accrue on the Class A-2 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) 3.4% exceeds the original interest rate.
Anticipated repayment date of United States treasury security term																																																10 years
Excess interest rate on original interest rate																																																3.40%						3.14%
Proceeds from issuance of debt instrument																																																				150,400,000		7,300,000
Payments of securitized financing transaction	3,839,000	57,000																																																		20,900,000
Payment for the acquisition of Brand																																																					218,300,000
Long term debt, current	61,250,000			52,000,000																																													61,300,000
Cash, restricted cash	46,360,000	14,572,000		16,362,000																																													39,900,000		12,500,000
Debt instrument, maturity date											Mar. 15, 2018
Net proceeds received from issuance of debt	662,188,000	150,000,000									391,000,000																		291,600,000
Debt instrument, interest payment period																			--03-15	--09-15																	--06-01	--12-01
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.																		The 2.50% Convertible Notes bear interest at an annual rate of 2.50%, payable semi-annually in arrears on June 1 and December 1 of each year, beginning December 1, 2011.
Debt instrument, effective interest rate											6.50%																		7.25%
Debt instrument, conversion rate											32.4052																		32.5169
Principal amount of each convertible note											1,000																		1,000
Convertible notes, initial conversion price per share											$ 30.86																		$ 30.75
Percentage of closing price of the Company's common stock for at least 20 trading days in the 30 consecutive trading days																										130.00%	98.00%																130.00%	98.00%
Redemption price percentage per principal amount																								100.00%	102.00%																100.00%	102.00%
Long term debt	1,435,498,000			911,718,000										319,481,000	[1]	319,481,000	[1]													263,817,000	[2]		263,817,000	[2]		254,718,000											57,000,000		852,200,000		600,000,000
Non cash additional interest expense on convertible notes	17,705,000	17,096,000												3,700,000		7,900,000														2,900,000		2,700,000	8,200,000		7,600,000
Cash interest expense for convertible notes														1,500,000		3,200,000														1,900,000		1,900,000	5,600,000		5,600,000
Sale of 1.5% Convertible Notes, shares repurchased											2,964,000
Sale of 1.5% Convertible Notes, shares repurchased value	2,737,000										69,000,000
Convertible notes, common stock option shares																					13,000,000																		9,800,000
Payment for the purchased call option																						84,100,000																	58,700,000
Deferred income tax related to convertible notes																						29,400,000	26,200,000																20,600,000	11,000,000
Sold warrants, shares of common stock													12,960,000																9,760,000
Sold warrants, shares of common stock strike price per share													35.5173																40.6175
Sold warrants, shares of common stock exercise date													Jun. 18, 2018																Sep. 01, 2016
Sold warrants, shares of common stock expiring date													Sep. 01, 2018																Dec. 31, 2016
Proceeds received from sale of sold warrants	57,707,000												57,700,000																28,800,000
Adjustments to additional paid in capital due convertible note hedge and warrants													3,000,000																(9,400,000)
Convertible notes, warrant strike price												$ 35.5173																$ 40.6175
Percentage of premiums												52.50%																75.00%
Selling price per share of common stock												$ 23.29																$ 23.21
Debt instrument, maturity date, month and year																													2016-06
Repayment of principal and interest																																													$ 52,700,000

[1] Reflects the net debt carrying amount of the 1.50% Convertible Notes in the consolidated balance sheet as of September 30, 2013, in accordance with accounting for convertible notes. The principal amount owed to the holders of the 1.50% Convertible Notes is $400.0 million.

[2] Reflects the net debt carrying amount of the 2.50% Convertible Notes in the consolidated balance sheet as of September 30, 2013, in accordance with accounting for convertible notes. The principal amount owed to the holders of the 2.50% Convertible Notes is $300.0 million.