Share-Based Compensation (RSUs Vested and Converted) (Details) (RSUs) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested during the year	942	1,138	982
Award converted during the year, net of shares withheld for taxes	905	761	442
Shares withheld for taxes	407	312	150

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration