Fair Value Measurements (Details 3) (Fair Value Measurements Non- recurring basis [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Discounted cash flow [Member]
Summary of Significant Unobservable Inputs Used for Non Recurring Fair Value measurements
Asset measured at fair value	$ 1,958
Valuation Technique	Discounted cash flow
Discounted cash flow [Member] | Minimum [Member]
Summary of Significant Unobservable Inputs Used for Non Recurring Fair Value measurements
Input range	6.00%
Discounted cash flow [Member] | Maximum [Member]
Summary of Significant Unobservable Inputs Used for Non Recurring Fair Value measurements
Input range	10.00%
Discounted cash flow [Member] | Weighted Average [Member]
Summary of Significant Unobservable Inputs Used for Non Recurring Fair Value measurements
Input range	9.00%
Indicative Bids [Member]
Summary of Significant Unobservable Inputs Used for Non Recurring Fair Value measurements
Asset measured at fair value	$ 1,775
Valuation Technique	Indicative Bids