Organization and Summary of Significant Accounting Policies (Earning Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounting Policies [Abstract]
Income from continuing operations, net of tax	$ 46,320	$ 53,412	$ 38,203
Weighted-average shares outstanding - basic	18,371,000	18,177,000	17,198,000
Effect of dilutive stock options (in shares)	309,000	521,000	570,000
Denominator for diluted earnings per share - Adjusted weighted-average shares and assumed conversions (shares)	18,680,000	18,698,000	17,768,000
Basic income from continuing operations (in dollars per share)	$ 2.52	$ 2.94	$ 2.22
Diluted income from continuing operationss (in dollars per share)	$ 2.48	$ 2.86	$ 2.15
Antidilutive securities excluded from computation of earnings per share (shares)	44,350	0	0