Equity Compensation (Schedule of Equity Compensation Performance Award Valuation Assumptions) (Details) - Performance Shares - $ / shares	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Equity Compensation [Abstract]
Dividends per share (quarterly amounts)	$ 0.06	$ 0.05
Risk-free interest rate	1.50%	1.60%

The risk-free interest rate assumption that is used in valuing an option on its own shares.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iv)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration