XML 73 R64.htm IDEA: XBRL DOCUMENT

Income Taxes (Details) (USD $)	3 Months Ended
Income Taxes (Details) (USD $)	Mar. 31, 2012	Mar. 31, 2011
Income Taxes [Line Items]
Provision for income taxes	$ 21,853,000	$ 22,409,000
Effective tax rate	29.50%	31.80%
Minimum [Member]
Income Taxes [Line Items]
Change in unrecognized tax benefits over next 12 months	0
Maximum [Member]
Income Taxes [Line Items]
Change in unrecognized tax benefits over next 12 months	$ 1,600,000

- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

+ References+ Details

- Definition

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

+ References+ Details