Condensed Consolidating Statements of Operations (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Revenues:      
Rental $ 121,028 $ 94,080  
Sales 6,724 7,866  
Other 4,877 458  
Total revenues 132,629 102,404  
Costs and expenses:      
Cost of sales 4,197 5,553  
Rental, selling and general expenses 83,982 68,356  
Restructuring expenses 483 585 3,542
Asset impairment charge, net 64,726 283  
Depreciation and amortization 15,539 9,145  
Total costs and expenses 168,927 83,922  
(Loss) income from operations (36,298) 18,482  
Other income (expense):      
Interest expense (9,059) (6,987)  
Foreign currency exchange   (1)  
(Loss) income before income tax (benefit) provision (45,357) 11,494  
Income tax (benefit) provision (18,031) 4,054  
Net (loss) income (27,326) 7,440  
Eliminations      
Other income (expense):      
Interest income (2,662) (30)  
Interest expense 2,662 30  
Guarantors      
Revenues:      
Rental 100,018 74,268  
Sales 5,669 6,527  
Other 4,787 351  
Total revenues 110,474 81,146  
Costs and expenses:      
Cost of sales 3,401 4,552  
Rental, selling and general expenses 69,610 53,708  
Restructuring expenses 483 397  
Asset impairment charge, net 64,726 136  
Depreciation and amortization 13,848 7,277  
Total costs and expenses 152,068 66,070  
(Loss) income from operations (41,594) 15,076  
Other income (expense):      
Interest income 2,662 30  
Interest expense (11,343) (6,599)  
(Loss) income before income tax (benefit) provision (50,275) 8,507  
Income tax (benefit) provision (18,991) 3,299  
Net (loss) income (31,284) 5,208  
Non-Guarantors      
Revenues:      
Rental 21,010 19,812  
Sales 1,055 1,339  
Other 90 107  
Total revenues 22,155 21,258  
Costs and expenses:      
Cost of sales 796 1,001  
Rental, selling and general expenses 14,372 14,648  
Restructuring expenses   188  
Asset impairment charge, net   147  
Depreciation and amortization 1,691 1,868  
Total costs and expenses 16,859 17,852  
(Loss) income from operations 5,296 3,406  
Other income (expense):      
Interest expense (378) (418)  
Foreign currency exchange   (1)  
(Loss) income before income tax (benefit) provision 4,918 2,987  
Income tax (benefit) provision 960 755  
Net (loss) income $ 3,958 $ 2,232