The number of warrants or rights sold by the entity during the period under equity method of investing of accounting.

No definition available.

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Number of shares acquired by the entity through equity method investment.

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Number of warrants issued by the entity through equity method investment.

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Element refers to the number of types of investments made by the entity.

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Exercise price per share or per unit of warrants or rights outstanding.

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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments.

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Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

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The cash inflow associated with the sale of equity securities classified as available-for-sale securities.

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Number of shares issued during the period as a result of the conversion of convertible securities.

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Value of stock issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit).

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INVESTMENTS (Details) (USD $)	3 Months Ended		1 Months Ended
INVESTMENTS (Details) (USD $)	Mar. 31, 2015 Investment	Mar. 31, 2014	Feb. 28, 2015	Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
Number of types of investments	2hchc_NumberOfTypesOfInvestments
Long-term investments	$ 58,827,000			$ 48,674,000
Number of common stock sold (in shares)	25,400,886us-gaap_CommonStockSharesIssued			23,844,711us-gaap_CommonStockSharesIssued
Proceeds from sale of common stock and warrants	1,026,000	0
Income (loss) from equity investees	(2,688,000)	0
Common Stock [Member]
Schedule of Equity Method Investments [Line Items]
Number of shares issued upon conversion (in shares)	118,000
Global Cable Technology Ltd. [Member] \| Common Stock [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments	0			49,000
SB Submarine Systems Co., Ltd. [Member] \| Common Stock [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments	15,731,000			12,882,000
International Cableship Pte., Ltd. [Member] \| Common Stock [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments	2,393,000			2,111,000
Sembawang Cable Depot Ptd., Ltd. [Member] \| Common Stock [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments	874,000			808,000
Huawei Marine Systems Co., Ltd. [Member] \| Common Stock [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments	8,090,000			10,087,000
Visser Smit Global Marine Partnership [Member] \| Common Stock [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments	414,000			464,000
Novatel Wireless, Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments, ownership percentage (in hundredths)	23.00%
Number of common stock sold (in shares)			586,095
Number of warrants sold (in shares)			293,047
Proceeds from sale of common stock and warrants			1,000,000
Income (loss) from equity investees	(2,700,000)		200,000
Equity method accounting, basis difference	5,600,000
Novatel Wireless, Inc. [Member] \| Trade Names [Member]
Schedule of Equity Method Investments [Line Items]
Equity method accounting, basis difference	600,000
Amortization period	15 years
Novatel Wireless, Inc. [Member] \| Technology and Customer Intangible [Member]
Schedule of Equity Method Investments [Line Items]
Equity method accounting, basis difference	800,000
Amortization period	7 years
Novatel Wireless, Inc. [Member] \| Goodwill [Member]
Schedule of Equity Method Investments [Line Items]
Equity method accounting, basis difference	4,200,000
Novatel Wireless, Inc. [Member] \| Common Stock [Member]
Schedule of Equity Method Investments [Line Items]
Number of shares issued upon conversion (in shares)	3,824,600
Value of common stock converted	8,600,000
Warrants to purchase common stock (in shares)	1,593,583
Purchase price of stock (in dollars per share)	$ 5.50
Novatel Wireless, Inc. [Member] \| Warrants [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments	19,368,000			13,419,000
Equity method investments, warrants received (in shares)	11,473,799			1,593,583
Kaneland LLC [Member] \| Common Stock [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments	1,120,000			1,151,000
NerVve Technologies, Inc. [Member] \| Series A-1 Preferred Stock [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments	5,538,000			5,538,000
Equity method investments, shares (in shares)	885,286			885,286
Benevir Biopharm, Inc. [Member] \| Series A-1 Preferred Stock [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments	1,799,000			1,915,000
Equity method investments, shares (in shares)	2,000			2,000
DTV America Corporation [Member] \| Convertible Debt [Member]
Schedule of Equity Method Investments [Line Items]
Cost method investments	3,000,000			0
mParticle [Member] \| Convertible Debt [Member]
Schedule of Equity Method Investments [Line Items]
Cost method investments	$ 500,000			$ 250,000