Rental Merchandise (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Rental Merchandise (Details) [Abstract]
On rent, cost	$ 1,309,456	$ 1,210,612
On rent, accumulated depreciation	(487,569)	(444,187)
Rental merchandise on rent, net	821,887	766,425	655,248
Held for rent, cost	250,393	250,591
Held for rent, accumulated depreciation	(51,476)	(63,823)
Rental merchandise held for rent, net	$ 198,917	$ 186,768	$ 181,606