Income Taxes - Additional Information (Detail)	3 Months Ended		12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 USD ($) Installments	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Income Taxes [Line Items]
U.S. corporate income tax rate			21.00%	21.00%	35.00%
Provisional income tax benefit related to remeasurement of domestic net deferred tax liabilities and deferred tax assets	$ 2,049,000				$ 90,965,000
Net provisional income tax expense related to deemed repatriation of unremitted earnings of foreign subsidiaries					$ 1,132,000
Income tax benefit related to re-measurement of domestic net deferred tax liabilities and deferred tax assets	2,049,000
Income tax expense related to deemed repatriation of unremitted earnings of foreign subsidiaries	151,000
Other assets, net	1,008,000		$ 20,000	$ 1,008,000
Deferred income tax liabilities	174,427,000		$ 126,081,000	174,427,000
State tax credit carryforwards expiration year			2022
Foreign tax credit carryforwards expiration year			2020
Deferred tax liability	210,157,000		$ 384,510,000	210,157,000
Number of annual installments to pay transition tax | Installments			8,000
Unrecognized Tax Benefit That Would Impact Effective Tax Rate	1,320,000		$ 4,891,000	1,320,000
Accrued interest and penalties	129,000		618,000	129,000
Goodwill Impairment charge			$ 556,056,000
Goodwill impairment loss for which tax benefit has not been recognised				$ 455,689,000
Goodwill Impairment impact on income tax rate			(17.90%)	17.90%
Unrecognized Tax Benefits, Period Increase (Decrease)			$ 3,000,000
Non-U.S. Subsidiaries [Member]
Income Taxes [Line Items]
Deferred tax liability			0
Deferred Rent and Other Longterm Liabilities [Member]
Income Taxes [Line Items]
Transition tax unpaid recorded in deferred rent and other long-term liabilities				$ 4,205,000
Germany [Member]
Income Taxes [Line Items]
Net operating loss carryforwards			9,134,000
United Kingdom [Member]
Income Taxes [Line Items]
Net operating loss carryforwards			4,269,000
Australia [Member]
Income Taxes [Line Items]
Net operating loss carryforwards			599,000
Other Foreign Country [Member]
Income Taxes [Line Items]
Net operating loss carryforwards			$ 1,872,000
Domestic [Member]
Income Taxes [Line Items]
Operating loss carryforwards acquisition expiration date			2032
Foreign Tax Authority [Member]
Income Taxes [Line Items]
Transition tax recorded	$ 151,000	$ 11,500,000
Repatriation tax			$ 11,500,000
Deferred income tax liabilities on unremitted foreign earnings			10,368,000
Deferred tax liability			$ 1,177,000