Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income	$ 167,429us-gaap_ProfitLoss	$ 142,587us-gaap_ProfitLoss	$ 123,509us-gaap_ProfitLoss
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of property and equipment	2,605us-gaap_Depreciation	2,702us-gaap_Depreciation	2,784us-gaap_Depreciation
Amortization of trademarks and other intangibles	4,530us-gaap_AmortizationOfIntangibleAssets	7,428us-gaap_AmortizationOfIntangibleAssets	5,528us-gaap_AmortizationOfIntangibleAssets
Amortization of deferred financing costs	5,263us-gaap_AmortizationOfFinancingCosts	4,816us-gaap_AmortizationOfFinancingCosts	3,263us-gaap_AmortizationOfFinancingCosts
Amortization of convertible note discount	29,616	24,838	20,098
Stock-based compensation expense	18,492us-gaap_ShareBasedCompensation	20,018us-gaap_ShareBasedCompensation	11,492us-gaap_ShareBasedCompensation
Non-cash gain on re-measurement of equity investment	(37,893)
Provision for doubtful accounts	11,127us-gaap_ProvisionForDoubtfulAccounts	9,718us-gaap_ProvisionForDoubtfulAccounts	5,362us-gaap_ProvisionForDoubtfulAccounts
Earnings on equity investments in joint ventures	(17,030)	(12,129)	(10,887)
Distributions from equity investments	7,145	13,116	2,265
Gain on sale of securities	(342)us-gaap_GainLossOnSaleOfSecuritiesNet	(5,395)us-gaap_GainLossOnSaleOfSecuritiesNet
Gain on sale of trademarks	(54,303)	(34,579)	(12,133)
Deferred income tax provision	45,573us-gaap_DeferredIncomeTaxExpenseBenefit	31,416us-gaap_DeferredIncomeTaxExpenseBenefit	24,385us-gaap_DeferredIncomeTaxExpenseBenefit
Changes in operating assets and liabilities, net of business acquisitions:
Accounts receivable	(28,031)	3,730	(10,942)
Other assets - current	(10,892)	(2,491)	20,513
Other assets	(5,719)	(9,132)	11,889
Deferred revenue	(7,414)	6,102	(3,745)
Accounts payable and accrued expenses	32,365	407	13,543
Net cash provided by operating activities	162,521	203,152	206,924
Cash flows used in investing activities:
Purchases of property and equipment	(1,505)	(1,209)	(1,595)
Purchase of securities	(5,998)
Proceeds from sale of securities	6,341	5,395
Additional investments in joint ventures		(744)	(6,870)
Earn-out payment on acquisitions			(3,771)
Proceeds from sale of trademarks	24,915	41,866	2,000
Additions to trademarks	(915)	(8,372)	(633)
Net cash used in investing activities	(33,662)	(163,351)	(244,869)
Cash flows (used in) provided by financing activities:
Shares repurchased on the open market	(193,434)	(436,419)	(125,341)
Proceeds from long-term debt		392,000	750,000
Proceeds from sale of warrants		57,707us-gaap_ProceedsFromIssuanceOfWarrants
Payment for purchase of convertible note hedge		(84,106)icon_PurchaseOfConvertibleNoteHedges
Payment of long-term debt	(62,856)us-gaap_RepaymentsOfLongTermDebt	(95,113)us-gaap_RepaymentsOfLongTermDebt	(491,765)us-gaap_RepaymentsOfLongTermDebt
Deferred financing costs		(3,838)us-gaap_PaymentsOfFinancingCosts	(20,941)us-gaap_PaymentsOfFinancingCosts
Distributions to non-controlling interests	(11,648)	(8,290)	(9,039)
Payment of note payable to Purim		(3,000)us-gaap_RepaymentsOfNotesPayable
Excess tax benefit from share-based payment arrangements	10,706	1,193	1,495
Cost of shares repurchased on vesting of restricted stock and exercise of stock options	(16,024)us-gaap_PaymentsForRepurchaseOfEquity	(3,707)us-gaap_PaymentsForRepurchaseOfEquity	(1,195)us-gaap_PaymentsForRepurchaseOfEquity
Proceeds from exercise of stock options and warrants	10,088	353	757
Proceeds from Securitization		270,188
Restricted cash	(9,163)	(42,496)	4,929
Net cash provided by (used in) financing activities	(272,331)	(528)	108,900
Effect of exchange rate changes on cash	(7,298)	844
Net increase (decrease) in cash and cash equivalents	(150,770)	40,117	70,955
Cash and cash equivalents, beginning of year	278,789	238,672	167,717
Cash and cash equivalents, end of year	128,019	278,789	238,672
Cash paid during the year:
Income taxes	3,508us-gaap_IncomeTaxesPaid	20,054us-gaap_IncomeTaxesPaid	14,847us-gaap_IncomeTaxesPaid
Interest	48,224us-gaap_InterestPaid	40,410us-gaap_InterestPaid	16,043us-gaap_InterestPaid
Non-cash investing activities:
Sale of trademarks for notes receivable	51,246us-gaap_NotesAssumed1	15,763us-gaap_NotesAssumed1	4,000us-gaap_NotesAssumed1
Non-cash financing activities:
Shares repurchased on the open market included in payable	3,156icon_ShareRepurchasedValue
Acquisitions:
Common stock issued			2,221us-gaap_StockIssued1
Buffalo Brand
Cash flows used in investing activities:
Acquisition of interest		(76,500)
Lee Cooper
Cash flows used in investing activities:
Acquisition of interest		(66,667)
Complex Media Inc.
Cash flows used in investing activities:
Acquisition of interest		(25,120)
Marcy Media Holdings
Cash flows used in investing activities:
Acquisition of interest		(32,000)
Latin America
Cash flows used in investing activities:
Acquisition of interest	(42,000)
MG Icon
Cash flows used in investing activities:
Acquisition of interest			(4,000)
NGX LLC
Cash flows used in investing activities:
Acquisition of interest	(6,000)
Hydraulic IP Holdings
Cash flows used in investing activities:
Acquisition of interest	(6,000)
iBrands
Cash flows used in investing activities:
Acquisition of interest	(2,500)
Umbro
Cash flows used in investing activities:
Acquisition of interest			(225,000)
Modern Amusement
Cash flows used in investing activities:
Acquisition of interest			(5,000)
IPH Unltd
Cash flows (used in) provided by financing activities:
Acquisition of equity method investments		$ (45,000)

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