Significant Accounting Policies Significant Accounting Poilicies Insurance Accruals (Details)	Dec. 31, 2013	Dec. 31, 2012
Insurance Accruals [Abstract]
Loss Contingency Accrual, Insurance-related Assessment, Discount Rate	1.79%	0.91%

The rate applied as of the balance sheet date to reduce the undiscounted amount of a guarantee fund and other insurance-related assessments to present value.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 405

-SubTopic 30

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6392405&loc=d3e24119-109301

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