Quarterly Financial Information (unaudited)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Information (unaudited)

(15) QUARTERLY FINANCIAL INFORMATION (unaudited)

The following table contains selected financial information from unaudited statements of income for each quarter of 2014 and 2013.

	Quarters Ended
	2014								2013
	Dec. 31		Sept. 30		June 30		Mar. 31		Dec. 31		Sept. 30		June 30		Mar. 31
Revenues	$	127,440	$	128,664	$	124,371	$	112,626	$	110,735	$	107,021	$	103,088	$	95,799
Gross profit		60,491		61,792		58,558		52,530		52,767		49,549		47,042		43,845
Income before income taxes		24,760		26,698		23,406		19,603		19,062		17,572		15,053		14,132
Net income		15,317		17,000		14,740		11,883		10,512		11,049		9,047		8,493
Earnings per diluted share		0.43		0.48		0.42		0.33		0.30		0.32		0.26		0.25
Shares used in computing diluted    earnings per share		35,661		35,284		35,161		35,500		35,348		34,764		34,290		33,948