Restructuring and Related Reorganization Costs - Summary of Severance and Related Charges (Details) - Corporate Restructuring Plan - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 2,354,000	$ 0
Costs Incurred	3,726,000	6,630,000
Cash Payments	(6,080,000)	(4,276,000)
Ending Balance	0	2,354,000
Retention and personnel liability
Restructuring Reserve [Roll Forward]
Beginning Balance	1,956,000	0
Costs Incurred	2,418,000	5,098,000
Cash Payments	(4,374,000)	(3,142,000)
Ending Balance	0	1,956,000
Other liability
Restructuring Reserve [Roll Forward]
Beginning Balance	398,000	0
Costs Incurred	1,308,000	1,532,000
Cash Payments	(1,706,000)	(1,134,000)
Ending Balance	$ 0	$ 398,000