Acquisitions - Additional Information (Details) - USD ($) $ in Thousands					3 Months Ended								12 Months Ended
	Dec. 06, 2019	Oct. 25, 2019	Apr. 15, 2019	Apr. 05, 2019	Dec. 31, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 31, 2021	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Cash used to acquire businesses, net of cash acquired														$ 74,392	$ 84,580	$ 166,896
Severance, restructuring, and acquisition integration costs					$ 21,000	$ 3,000	$ 2,500	$ 0	$ 2,200	$ 4,600	$ 4,600	$ 11,200		26,544	22,625	41,893
Amortization of intangibles														74,609	75,140	90,188
Net income (loss)					(147,229)	$ (297,015)	$ 42,290	$ 25,178	$ 43,491	$ 85,858	$ 28,792	$ 2,570		(376,776)	160,711	$ 92,853
Special Product Company (SPC)
Business Acquisition [Line Items]
Cash used to acquire businesses, net of cash acquired	$ 23,100
Opterna International Corp.
Business Acquisition [Line Items]
Cash used to acquire businesses, net of cash acquired			$ 51,700
Percentage of outstanding shares acquired			100.00%
Acquisition price paid														45,900
Maximum earnout consideration			$ 25,000
Estimated earnout consideration			5,800
Payments to acquire interest in subsidiaries		$ 400
Noncontrolling interest, purchase price		$ 800
Long-term debt acquired			6,817
Goodwill, purchase accounting adjustments					(600)
Fair value of acquired receivables			$ 5,308		$ 5,300									5,300
Post acquisition revenue of acquiree														26,600
Severance, restructuring, and acquisition integration costs															5,500
Amortization of intangibles														3,000	3,800
Inventory adjustment														600	$ 500
Post acquisition income (loss) before taxes of acquiree														2,000
Net income (loss)														100
PPC Broadband and Opterna Integration Program
Business Acquisition [Line Items]
Severance, restructuring, and acquisition integration costs														6,100
Acquisition integration costs														$ 5,600
Suttle, Inc. Asset Acquisition
Business Acquisition [Line Items]
Asset acquisition, consideration transferred				$ 5,000
Scenario, Forecast | Opterna International Corp.
Business Acquisition [Line Items]
Payments to acquire interest in subsidiaries													$ 400