Condensed Consolidating Balance Sheets (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
ASSETS
Cash and cash equivalents	$ 10,795	$ 8,053
Receivables, net	99,259	104,390
Inventories	9,540	9,517
Rental fleet, net	960,177	966,223
Property, plant and equipment, net	153,824	157,183
Operating lease assets	91,521	93,116
Other assets	14,453	13,806
Intangibles, net	50,629	51,185
Goodwill	710,053	713,404
Total assets	2,100,251	2,116,877
Liabilities:
Accounts payable	40,299	31,554
Accrued liabilities	63,405	77,069
Operating lease liabilities	93,437	94,932
Lines of credit	557,500	555,400
Obligations under finance leases	75,533	74,399
Senior notes, net	247,287	247,127
Deferred income taxes	198,420	195,034
Total liabilities	1,275,881	1,275,515
Commitments and contingencies
Stockholders' equity:
Common stock	506	504
Additional paid-in capital	641,515	638,083
Retained earnings	440,144	445,285
Accumulated other comprehensive loss	(79,478)	(65,093)
Treasury stock, at cost	(178,317)	(177,417)
Total stockholders' equity	824,370	841,362	$ 825,157	$ 810,269
Total liabilities and stockholders' equity	2,100,251	2,116,877
Eliminations
ASSETS
Intercompany receivables	(178,034)	(177,837)
Total assets	(178,034)	(177,837)
Liabilities:
Intercompany payables	(30,035)	(29,838)
Total liabilities	(30,035)	(29,838)
Commitments and contingencies
Stockholders' equity:
Additional paid-in capital	(147,999)	(147,999)
Total stockholders' equity	(147,999)	(147,999)
Total liabilities and stockholders' equity	(178,034)	(177,837)
Guarantors
ASSETS
Cash and cash equivalents	1,001	559
Receivables, net	85,223	90,153
Inventories	7,868	7,210
Rental fleet, net	818,468	814,129
Property, plant and equipment, net	129,846	132,532
Operating lease assets	70,553	69,911
Other assets	13,419	12,531
Intangibles, net	50,403	50,920
Goodwill	651,707	651,137
Intercompany receivables	145,874	146,008
Total assets	1,974,362	1,975,090
Liabilities:
Accounts payable	35,265	25,156
Accrued liabilities	55,897	68,916
Operating lease liabilities	73,108	72,453
Lines of credit	557,500	555,400
Obligations under finance leases	75,465	74,319
Senior notes, net	247,287	247,127
Deferred income taxes	179,796	175,291
Intercompany payables	29,824	29,782
Total liabilities	1,254,142	1,248,444
Commitments and contingencies
Stockholders' equity:
Common stock	506	504
Additional paid-in capital	641,515	638,083
Retained earnings	256,516	265,476
Treasury stock, at cost	(178,317)	(177,417)
Total stockholders' equity	720,220	726,646
Total liabilities and stockholders' equity	1,974,362	1,975,090
Non-Guarantors
ASSETS
Cash and cash equivalents	9,794	7,494
Receivables, net	14,036	14,237
Inventories	1,672	2,307
Rental fleet, net	141,709	152,094
Property, plant and equipment, net	23,978	24,651
Operating lease assets	20,968	23,205
Other assets	1,034	1,275
Intangibles, net	226	265
Goodwill	58,346	62,267
Intercompany receivables	32,160	31,829
Total assets	303,923	319,624
Liabilities:
Accounts payable	5,034	6,398
Accrued liabilities	7,508	8,153
Operating lease liabilities	20,329	22,479
Obligations under finance leases	68	80
Deferred income taxes	18,624	19,743
Intercompany payables	211	56
Total liabilities	51,774	56,909
Commitments and contingencies
Stockholders' equity:
Additional paid-in capital	147,999	147,999
Retained earnings	183,628	179,809
Accumulated other comprehensive loss	(79,478)	(65,093)
Total stockholders' equity	252,149	262,715
Total liabilities and stockholders' equity	$ 303,923	$ 319,624