Disposal Group, Including Discontinued Operation, Consideration Held In Escrow For Future Losses Payable

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- Definition

Disposal Group, Including Discontinued Operation, Consideration Held In Escrow For Purchase Price Adjustment

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- Definition

Disposal Group, Including Discontinued Operation, Consideration Paid Upon Triggering Event

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- Definition

Disposal Group, Including Discontinued Operation, Gain (Loss) on Sale of Subsidiary

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- Definition

Disposal Group, Including Discontinued Operation, Ownership Percentage in Disposed Asset

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- Definition

Disposal Group, Including Discontinued Operation, Potential Earn-Out, Maximum

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- Definition

Other Comprehensive Income (Loss), Disposal Of Subsidiary, Net of Tax

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No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Reduction in cash due to no longer including the former subsidiary's cash in the consolidated entity's cash.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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- Definition

Amount of current foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

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No definition available.

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- Definition

Amount of gain (loss) on sale or disposal of an equity method investment.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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No definition available.

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- Definition

Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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- Definition

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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This element represents the cash inflow during the period from the sale of a component of the entity.

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Percentage of subsidiary's or equity investee's stock owned by parent company before stock transaction.

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Acquisitions, Dispositions, and Deconsolidations - Spectrum Segment, Insurance Segment and Other Segments (Details) - USD ($) $ in Thousands						3 Months Ended					6 Months Ended
	Mar. 29, 2021	Jan. 15, 2021	Feb. 28, 2020	Jan. 30, 2020	Oct. 30, 2019	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	May 12, 2020
Business Acquisition [Line Items]
Cash received from dispositions, net of cash disposed											$ 71,200	$ 144,000
Gain (loss) on sale of subsidiary											40,400	(39,300)
Loss on disposal of subsidiary						$ 0			$ 700		0	(22,100)
Foreign currency translation adjustment						$ 400			(3,800)		1,200	$ (4,000)
CGI
Business Acquisition [Line Items]
Beneficial ownership interest	6.60%
Consideration to be received	$ 90,000
Proceeds from divestiture of businesses	$ 65,000
Marine Services
Business Acquisition [Line Items]
Consideration to be received				$ 250,000	$ 140,000
Proceeds from divestiture of businesses			$ 144,000						85,500
Ownership percentage before sale of stock				100.00%
Potential earn-out, maximum				$ 12,500
Cash received from dispositions, net of cash disposed			100,800
Consideration held in escrow for future losses payable				1,250
Consideration held of escrow for purchase price adjustment				1,910
Consideration paid on the earlier of December 31, 2020 or the date on which a cash collateralized bond in connection with Company's bonding facility is released				$ 2,400
Gain (loss) on sale of subsidiary							$ 1,200	$ 2,400		$ (39,300)
Loss on disposal of subsidiary										$ 31,300
Realized gain (loss) on disposal											71,100
Tax expense (benefit)											7,200
Marine Services \| Put Option
Business Acquisition [Line Items]
Realized gain (loss) on disposal											$ 11,300
Marine Services \| Non- controlling Interest
Business Acquisition [Line Items]
Proceeds from divestiture of businesses									17,500
Cash divested from deconsolidation			36,800
Marine Services \| Noncontrolling Interest Redeemable
Business Acquisition [Line Items]
Proceeds from divestiture of businesses									$ 2,100
Cash divested from deconsolidation			$ 5,500
Huawei Marine Networks
Business Acquisition [Line Items]
Consideration to be received					$ 285,000
Beyond6
Business Acquisition [Line Items]
Consideration to be received		$ 106,500
Proceeds from divestiture of businesses		70,000
Gain (loss) on sale of subsidiary		$ 39,200
DTV America
Business Acquisition [Line Items]
Parents interest, controlling						76.00%	60.00%				76.00%
New Saxon 2019 Limited
Business Acquisition [Line Items]
Parents interest, controlling				73.00%									19.00%
Marine Services
Business Acquisition [Line Items]
Parents interest, controlling					49.00%	73.00%					73.00%		30.00%
Huawei Marine Networks
Business Acquisition [Line Items]
Ownership percentage before sale of stock					49.00%