Fair Value Measurement (Details 2) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Asset (Liability) Carrying Amount
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt and lines of credit	$ (279,365)	$ (269,608)
Fair Value
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt and lines of credit	$ (277,059)	$ (270,331)