Leases Lease Terms Details (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating Leased Assets [Line Items]
Operating Leases, Rent Expense, Net	$ 1,293	$ 1,331	$ 884
Minimum [Member]
Operating Leased Assets [Line Items]
Term of Lease	one year
Renewal Term of Lease	one year
Maximum [Member]
Operating Leased Assets [Line Items]
Term of Lease	fifteen years
Renewal Term of Lease	five years