Significant Accounting Policies - Goodwill And Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Dec. 31, 2014	Sep. 30, 2014
Goodwill [Line Items]
Deferred tax assets	$ 15.6us-gaap_DeferredTaxAssetsLiabilitiesNet	$ 15.7us-gaap_DeferredTaxAssetsLiabilitiesNet
Valuation allowance	11.1
Maximum
Goodwill [Line Items]
Charge to be expensed, if an impairment of all the goodwill became necessary	$ 8.6

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

Name:	us-gaap_DeferredTaxAssetsLiabilitiesNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant