Leases - Schedule of Transitions to ASC 842 on Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands		Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Leases [Line Items]
Prepaid expenses		$ 7,299		$ 7,771	[1]
Right of use asset, net		50,366
Deferred income tax assets, net		60,169		81,628
Assets of discontinued operations, non-current		81		178
Lease liability - operating, current		11,784
Other accrued expenses, current		16,375		19,668	[1]
Liabilities of discontinued operations, current		3		536
Lease liability - operating, non-current		52,391
Deferred rent obligations	[1]			12,745
Other liabilities, non-current		11,647		17,493	[1]
Accumulated earnings (deficit)		$ 18,071		$ (52,946)	[2]
ASC 842 [Member]
Leases [Line Items]
Prepaid expenses	[1]		$ 6,269
Right of use asset, net			45,963
Deferred income tax assets, net			81,303
Assets of discontinued operations, non-current			235
Lease liability - operating, current			18,656
Other accrued expenses, current	[1]		13,718
Liabilities of discontinued operations, current			593
Lease liability - operating, non-current			48,238
Other liabilities, non-current	[1]		12,395
Accumulated earnings (deficit)	[2]		(51,911)
ASC 842 [Member] | Impact of Modified Retrospective Adoption of ASC 842 [Member]
Leases [Line Items]
Prepaid expenses	[1]		(1,502)
Right of use asset, net			45,963
Deferred income tax assets, net			(325)
Assets of discontinued operations, non-current			57
Lease liability - operating, current			18,656
Other accrued expenses, current	[1]		(5,950)
Liabilities of discontinued operations, current			57
Lease liability - operating, non-current			48,238
Deferred rent obligations	[1]		(12,745)
Other liabilities, non-current	[1]		(5,098)
Accumulated earnings (deficit)	[2]		$ 1,035

[1] Balances as of December 31, 2018 that related to prepaid rent, remaining lease obligations for vacated spaces and deferred rent obligations were offset with the ROU asset as of January 1, 2019

[2] Certain leases resulted in a negative ROU asset upon transition to ASC 842 related to vacated spaces that had liabilities previously established. Those leases that resulted in a negative ROU asset were recorded as an adjustment, net of tax, to accumulated earnings (deficit) within stockholders equity on our consolidated balance sheet as of January 1, 2019