Quarterly report pursuant to sections 13 or 15(d)

Medical Equipment and Property - Summary of Medical Equipment (Detail)

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Medical Equipment and Property - Summary of Medical Equipment (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Medical Equipment And Property [Abstract]    
Medical Equipment in rental service $ 35,474 $ 34,193
Medical Equipment in rental service - pump reserve (123) (270)
Accumulated depreciation (21,346) (20,852)
Medical Equipment in rental service, net of accumulated depreciation 14,005 13,071
Medical equipment held for sale or rental 3,155 2,626
Total $ 17,160 $ 15,697