Investments Held to Maturity Investments Held to Maturity (Detail Textuals) $ in Millions	12 Months Ended
Dec. 31, 2013 USD ($)
Investments held to maturity [Abstract]
Held-to-maturity Securities, Sold Security, at Carrying Value	$ 97.9
Held-to-maturity Securities, Sold Security, Realized Gain (Loss)	$ (0.1)

This item represents the gain (loss) realized on the sale of held-to-maturity securities disposed of during the period. Additionally, this item may include, if not separately presented, any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt securities which are being or have been recognized in earnings during the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27405-111563

Name:	us-gaap_HeldToMaturitySecuritiesSoldSecurityRealizedGainLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration