Goodwill and Intangibles, net (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of the Changes in the Carrying Amount of Goodwill by Reporting Unit

The carrying amount of goodwill by segment were as follows (in millions):

	Construction			Marine Services		Energy		Telecom		Insurance		Life Sciences		Broadcasting			Other		Total
Balance at December 31, 2017		$	38.6	$	14.3	$	2.1	$	3.4	$	47.3	$	3.6		$	20.6	$	1.8	$	131.7
Measurement Period Adjustment		—		—		—		—		—		—			0.8		—		0.8
Acquisitions		43.6		—		—		1.0		—		—			—		—		44.6
Dispositions		—		—		—		—		—		(3.6)			—		(1.8)		(5.4)
Balance at December 31, 2018		82.2		14.3		2.1		4.4		47.3		—			21.4		—		171.7
Measurement Period Adjustment		7.1		—		—		0.1		—		—			—		—		7.2
Impairments		—		—		—		(4.5)		(47.3)		—			—		—		(51.8)
Translation		(0.3)		—		—		—		—		—			—		—		(0.3)
Balance at December 31, 2019		$	89.0	$	14.3	$	2.1	$	—	$	—	$	—		$	21.4	$	—	$	126.8

Schedule of Indefinite-Lived Intangible Assets

The carrying amount of indefinite-lived intangible assets were as follows (in millions):

	December 31,
	2019		2018
FCC licenses	$	136.2	$	120.6
State licenses	2.5		2.5
Total	$	138.7	$	123.1

Schedule of Intangible Assets Subject to Amortization

The gross carrying amount and accumulated amortization of amortizable intangible assets by major intangible asset class were as follows (in millions):

	Weighted-Average Original Useful Life	December 31, 2019							December 31, 2018
		Gross Carrying Amount		Accumulated Amortization			Net		Gross Carrying Amount		Accumulated Amortization			Net
Trade names	13 Years	$	26.0		$	(7.9)	$	18.1	$	25.9		$	(5.9)	$	20.0
Customer relationships	10 Years	56.0			(15.7)		40.3		53.6			(7.2)		46.4
Channel sharing arrangements	40 Years	27.2			(0.9)		26.3		25.2			—		25.2
Developed technology	4 Years	1.2			(1.2)		—		1.2			(1.2)		—
Other	7 Years	5.5			(1.9)		3.6		5.5			(1.0)		4.5
Total		$	115.9		$	(27.6)	$	88.3	$	111.4		$	(15.3)	$	96.1

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

Excluding the impact of any future acquisitions, dispositions or change in foreign currency, the Company estimates the annual amortization expense of amortizable intangible assets for the next five fiscal years will be as follows (in millions):

	Estimated Amortization
	Definite Lived Intangible Assets		Negative VOBA
2020	$	8.6	$	(20.8)
2021	8.3		(19.6)
2022	8.2		(18.4)
2023	8.0		(17.1)
2024	7.5		(15.9)
Thereafter	47.7		(129.2)
Total	$	88.3	$	(221.0)