Consolidated Statements of Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net income	$ 17,610,000	$ 18,156,000	$ 15,484,000
Other comprehensive loss:
Other comprehensive loss, foreign currency translation adjustment	(2,222,000)	(1,075,000)	(822,000)
Other comprehensive loss	(2,222,000)	(1,075,000)	(822,000)
Comprehensive Income	$ 15,388,000	$ 17,081,000	$ 14,662,000