Consolidated Statements of Comprehensive Earnings (unaudited) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Consolidated Statements of Comprehensive Earnings (unaudited) [Abstract]
Net earnings	$ 2,672,000	$ 2,565,000	$ 7,605,000	$ 6,858,000
Other comprehensive earnings (loss), net of $0 tax: Foreign currency translation adjustments	192,000	128,000	61,000	(53,000)
Comprehensive earnings	$ 2,864,000	$ 2,693,000	$ 7,666,000	$ 6,805,000