SEGMENT AND GEOGRAPHIC DISCLOSURES - Geographic Breakdown of Revenues and Total Long-Lived Assets (Detail) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Revenues		$ 287,807	$ 290,079	$ 315,829	$ 269,599	$ 309,799	$ 290,856	$ 343,889	$ 302,385	$ 1,163,314	$ 1,246,929	$ 1,200,211
Total Long-Lived Assets	[1]	376,018				326,166				376,018	326,166	363,380
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Revenues										838,385	908,382	871,367
Total Long-Lived Assets	[1]	328,832				298,567				328,832	298,567	330,909
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Revenues										127,574	139,900	134,256
Total Long-Lived Assets	[1]	8,625				4,165				8,625	4,165	5,377
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Revenues										126,794	126,142	119,603
Total Long-Lived Assets	[1]	32,517				20,224				32,517	20,224	22,480
Other foreign countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Revenues										70,561	72,505	74,985
Total Long-Lived Assets	[1]	$ 6,044				$ 3,210				$ 6,044	$ 3,210	$ 4,614

[1] Excludes goodwill, intangible assets not being amortized that are to be held and used, financial instruments and deferred tax assets.