Borrowings Line of Credit (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate Spread	2.25%
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	20,000
Line of Credit Facility, Interest Rate at Period End	2.50%