Condensed Consolidating Balance Sheets (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2014
Dec. 31, 2013
ASSETS        
Cash and cash equivalents $ 3,048 $ 3,739 $ 567 $ 1,256
Receivables, net 79,004 81,031    
Inventories 16,518 16,736    
Rental fleet, net 1,019,663 1,087,056    
Property, plant and equipment, net 116,735 113,175    
Deposits and prepaid expenses 7,501 8,586    
Deferred financing costs, net and other assets 8,173 8,858    
Intangibles, net 76,965 78,385    
Goodwill 703,337 705,608    
Total assets 2,030,944 2,103,174    
Liabilities:        
Accounts payable 30,465 22,933    
Accrued liabilities 64,590 63,727    
Lines of credit 701,381 705,518    
Obligations under capital leases 26,270 24,918    
Senior Notes 200,000 200,000    
Deferred income taxes 213,365 231,547    
Total liabilities 1,236,071 1,248,643    
Commitments and contingencies          
Stockholders' equity:        
Common stock 491 490    
Additional paid-in capital 572,364 569,083    
Retained earnings 344,625 380,504    
Accumulated other comprehensive loss (41,647) (29,870)    
Treasury stock, at cost (80,960) (65,676)    
Total stockholders' equity 794,873 854,531    
Total liabilities and stockholders' equity 2,030,944 2,103,174    
Eliminations        
ASSETS        
Intercompany receivables (177,983) (178,989)    
Total assets (177,983) (178,989)    
Liabilities:        
Deferred income taxes   (1,004)    
Intercompany payables (92) (94)    
Total liabilities (92) (1,098)    
Commitments and contingencies          
Stockholders' equity:        
Common stock (18,388) (18,388)    
Additional paid-in capital (160,347) (160,347)    
Retained earnings 844 844    
Total stockholders' equity (177,891) (177,891)    
Total liabilities and stockholders' equity (177,983) (178,989)    
Guarantors        
ASSETS        
Cash and cash equivalents 1,980 2,977 545 (190)
Receivables, net 60,310 62,033    
Inventories 15,447 15,371    
Rental fleet, net 868,049 934,433    
Property, plant and equipment, net 100,180 95,509    
Deposits and prepaid expenses 6,442 7,375    
Deferred financing costs, net and other assets 8,173 8,858    
Intangibles, net 76,259 77,629    
Goodwill 636,863 635,943    
Intercompany receivables 144,313 145,018    
Total assets 1,918,016 1,985,146    
Liabilities:        
Accounts payable 20,531 14,803    
Accrued liabilities 57,658 56,104    
Lines of credit 697,533 702,135    
Obligations under capital leases 26,133 24,760    
Senior Notes 200,000 200,000    
Deferred income taxes 195,840 215,184    
Total liabilities 1,197,695 1,212,986    
Commitments and contingencies          
Stockholders' equity:        
Common stock 491 490    
Additional paid-in capital 572,364 569,083    
Retained earnings 228,426 268,263    
Treasury stock, at cost (80,960) (65,676)    
Total stockholders' equity 720,321 772,160    
Total liabilities and stockholders' equity 1,918,016 1,985,146    
Non-Guarantors        
ASSETS        
Cash and cash equivalents 1,068 762 22 1,446
Receivables, net 18,694 18,998    
Inventories 1,071 1,365    
Rental fleet, net 151,614 152,623    
Property, plant and equipment, net 16,555 17,666    
Deposits and prepaid expenses 1,059 1,211    
Intangibles, net 706 756    
Goodwill 66,474 69,665    
Intercompany receivables 33,670 33,971    
Total assets 290,911 297,017    
Liabilities:        
Accounts payable 9,934 8,130    
Accrued liabilities 6,932 7,623    
Lines of credit 3,848 3,383    
Obligations under capital leases 137 158    
Deferred income taxes 17,525 17,367    
Intercompany payables 92 94    
Total liabilities 38,468 36,755    
Commitments and contingencies          
Stockholders' equity:        
Common stock 18,388 18,388    
Additional paid-in capital 160,347 160,347    
Retained earnings 115,355 111,397    
Accumulated other comprehensive loss (41,647) (29,870)    
Total stockholders' equity 252,443 260,262    
Total liabilities and stockholders' equity $ 290,911 $ 297,017