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Incentive Plans: Equity Incentive Plan Policy: Schedule of Incentive Plan Stock Option Activity (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2013
Equity Incentive Plans
Mar. 31, 2013
Equity Incentive Plans
Shares:        
Outstanding, Beginning of Period 1,124,500 1,178,000 725,800 757,800
Granted     0 20,000
Exercised     (14,000) (42,000)
Forfeited     0 (24,000)
Oustanding, End of Period 1,124,500 1,178,000 711,800 711,800
Vested and expected to vest at March 31, 2013     630,000 630,000
Exercisable at March 31, 2013     302,350 302,350
Weighted-Average Exercise Price (in dollars per share):        
Oustanding, Beginning of Period     $ 12.60 $ 12.13
Granted     $ 0.00 $ 16.47
Exercised     $ 7.03 $ 7.03
Forfeited     $ 0.00 $ 7.41
Outstanding, End of Period     $ 12.71 $ 12.71
Vested and expected to vest at March 31, 2013     $ 13.34 $ 13.34
Exercisable at March 31, 2013     $ 19.24 $ 19.24
Weighted- Average Remaining Contractual Term (Years):        
Outstanding at March 31, 2013     6 years 8 months 5 days 6 years 8 months 5 days
Vested and expected to vest at March 31, 2013     6 years 5 months 19 days 6 years 5 months 19 days
Exercisable at March 31, 2013     4 years 6 months 4 years 6 months
Aggregate Intrinsic Value ($000):        
Outstanding at March 31, 2013     $ 5,025 $ 5,025
Vested and expected to vest at March 31, 2013     4,277 4,277
Exercisable at March 31, 2013     $ 1,287 $ 1,287