XML 40 R31.htm IDEA: XBRL DOCUMENT

Summary of Significant Accounting Policies Basic and Diluted Earnings Per Share, Shares (Details)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Accounting Policies [Abstract]
Weighted-average shares for fully diluted EPS (in shares)	86,822,475	83,013,566

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References+ Details