Intangible Assets (Summary of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 2,349	$ 2,349
Accumulated amortization	(1,709)	(1,581)
Finite-Lived Intangible Assets, Net	640	768
Ancillary provider network
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	1,921	1,921
Amortization expense	128	128
Useful life	15 years	15 years
Future amortization expense, 2014	128	128
Future amortization expense, 2015	128	128
Future amortization expense, 2016	128	128
Future amortization expense, 2017	128	128
Future amortization expense, 2018	128	128
Ancillary provider network | Minimum
Finite-Lived Intangible Assets [Line Items]
Rate of attrition	2.00%
Ancillary provider network | Maximum
Finite-Lived Intangible Assets [Line Items]
Rate of attrition	8.00%
Software
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 428	$ 428