Rental Merchandise (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Rental Merchandise (Details) [Abstract]
On rent, cost	$ 1,210,612	$ 1,083,496
On rent, accumulated depreciation	(444,187)	(428,248)
Rental merchandise on rent, net	766,425	655,248	589,066
Held for rent, cost	250,591	242,348
Held for rent, accumulated depreciation	(63,823)	(60,742)
Rental merchandise held for rent, net	$ 186,768	$ 181,606	$ 160,932