Fair Value Measurement: Schedule of Fair Value of Interest Rate Swap Liability (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012	Jun. 30, 2011
Interest Rate Swap Liability Change in Fair Value Through Earnings	$ 827	$ 1,109
Interest Rate Swap Liability Balance June 30	$ 1,230	$ 1,230	$ 0