Letters of Credit and Off Balance Sheet Liabilities (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Letters of Credit and Off Balance Sheet Liabilities [Abstract]
Outstanding standby letters of credit	$ 0.9us-gaap_ContractualObligation	$ 0.9us-gaap_ContractualObligation

Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments.

No definition available.

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