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Stock: Equity Compensation Plans Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Stockholders' Equity Note [Abstract]      
Shares available for grant 1,256,747    
Unrecognized compensation expense $ 7,700    
Weighted-average recognition period 1 year 8 months    
Stock-based compensation expense $ 4,076 $ 9,329 $ 12,595