Fair Value Measurement: Schedule of Fair Value of Interest Rate Swap Asset (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012
Interest Rate Swap Asset Change in Fair Value Through Earnings	$ 710	$ 1,089
Interest Rate Swap Asset Balance June 30	$ 1,200	$ 1,200