Stockholders' Equity (Details) (USD $) In Millions, except Per Share data, unless otherwise specified		0 Months Ended
Sep. 30, 2014	Aug. 22, 2014 Common Class A [Member]	Aug. 22, 2014 Common Class B [Member]
Class of Stock [Line Items]
Maximum dividend payment which may be paid without prior approval from Colorado Division of Insurance	$ 112.3
Dividends declared		$ 0.36	$ 0.18

Amount of dividends that can be declared or paid without approval of regulatory agency.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(e))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph e

-Article 4

Name:	us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant