Business Combinations, Pro Forma Information (Details) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) $ / shares shares
Business Acquisition, Pro Forma Information [Abstract]
Revenues | $	$ 359,433
Net income | $	$ 17,448
Basic net income per share | $ / shares	$ 0.52
Diluted net income per share | $ / shares	$ 0.51
Shares used in computing basic net income per share | shares	33,375
Shares used in computing diluted net income per share | shares	34,445