Quarterly Financial Information (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2011		Sep. 30, 2011		Jun. 30, 2011		Mar. 31, 2011		Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	$ 568,463		$ 529,510		$ 538,619		$ 585,996		$ 522,705		$ 484,731		$ 482,415		$ 532,480		$ 2,222,588	$ 2,022,331	$ 1,876,338
Gross Profit	263,278	[1]	258,637	[1]	265,573	[1]	282,657	[1]	242,163	[1]	231,942	[1]	236,958	[1]	259,542	[1]
Earnings Before Taxes From Continuing Operations	57,192		46,044		58,590		115,029		48,739		45,092		17,627		71,919		276,855	183,377	190,786
Net Earnings	$ 36,632		$ 28,941		$ 36,244		$ 71,226		$ 30,534		$ 28,045		$ 10,799		$ 44,389		$ 173,043	$ 113,767	$ 118,376
EARNINGS PER SHARE	$ 0.48		$ 0.38		$ 0.48		$ 0.94		$ 0.40		$ 0.36		$ 0.14		$ 0.55		$ 2.28	$ 1.46	$ 1.46
EARNINGS PER SHARE ASSUMING DILUTION	$ 0.48		$ 0.38		$ 0.47		$ 0.92		$ 0.40		$ 0.36		$ 0.13		$ 0.55		$ 2.25	$ 1.43	$ 1.44

[1] Gross profit is the sum of lease revenues and fees, retail sales, and non-retail sales less retail cost of sales, non-retail cost of sales, depreciation of lease merchandise and write-offs of lease merchandise.