XML 90 R60.htm IDEA: XBRL DOCUMENT

Income Taxes - Tax Status of Dividends (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Document Fiscal Year Focus	2014
Dividend per share	$ 1.88	$ 1.85	$ 1.85
Ordinary income	70.00%reg_AllocationOfDividendsOrdinaryIncome	70.00%reg_AllocationOfDividendsOrdinaryIncome	71.00%reg_AllocationOfDividendsOrdinaryIncome
Capital gain	16.00%reg_AllocationOfDividendsCapitalGain	6.00%reg_AllocationOfDividendsCapitalGain	1.00%reg_AllocationOfDividendsCapitalGain
Return of capital	14.00%	0.00%	28.00%
Allocation of Dividends, Qualified Dividend Income	0.00%	24.00%	0.00%