XML 108 R93.htm IDEA: XBRL DOCUMENT v3.8.0.1
Supplementary Financial Data (Unaudited) - Selected Unaudited Consolidated Financial Results (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2015
Quarterly Financial Information Disclosure [Abstract]                      
Revenues $ 253,205 $ 230,986 $ 228,378 $ 219,600 $ 235,824 $ 238,778 $ 206,678 $ 200,076 $ 932,169 $ 881,356 $ 838,781
Cost of revenues 75,202 [1] 69,793 [1] 72,131 [1] 69,997 [1] 74,298 [1] 66,384 [1] 62,298 [1] 62,193 [1] 287,123 [2] 265,173 [2] 270,535 [2]
Gross profit 178,003 161,193 156,247 149,603 161,526 172,394 144,380 137,883      
Net income $ 40,044 $ 25,227 $ 25,084 $ 37,901 $ 32,104 $ 34,987 $ 23,116 $ 19,241 $ 128,256 $ 109,448 $ 86,502
Earnings per share:                      
Basic (in dollars per share) $ 1.31 [3] $ 0.82 [3] $ 0.81 [3] $ 1.22 [3] $ 1.04 [3] $ 1.12 [3] $ 0.74 [3] $ 0.62 [3] $ 4.16 $ 3.52 $ 2.75
Diluted (in dollars per share) $ 1.25 [3] $ 0.78 [3] $ 0.78 [3] $ 1.16 [3] $ 1.00 [3] $ 1.08 [3] $ 0.72 [3] $ 0.59 [3] $ 3.98 $ 3.39 $ 2.65
Shares used in computing earnings per share:                      
Basic weighted-average shares (in shares) 30,534 30,914 31,017 30,989 30,916 31,149 31,268 31,185 30,862 31,129 31,402
Diluted (in shares) 31,963 32,224 32,260 32,536 32,221 32,313 32,262 32,436 32,245 32,308 32,609
[1] Cost of revenues excludes amortization expense of $1.4 million, $1.7 million, $1.7 million, $1.7 million, $1.7 million, $1.8 million, $1.8 million and $1.9 million for the quarters ended September 30, 2017, June 30, 2017, March 31, 2017, December 31, 2016, September 30, 2016, June 30, 2016, March 31, 2016 and December 31, 2015, respectively.
[2] Cost of revenues and selling, general and administrative expenses exclude the amortization of intangible assets. See Note 7.
[3] Earnings per share is computed independently for each of the quarters presented. Therefore, the sum of the quarterly per share amounts may not equal the totals for the respective years.