XML 113 R98.htm IDEA: XBRL DOCUMENT v3.8.0.1
Quarterly Consolidated Financial Data - Summary of Quarterly Financial Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]                      
Revenues $ 81,241 $ 79,941 $ 88,837 $ 81,359 $ 74,350 $ 73,063 $ 77,966 $ 76,474      
Gross profit 37,899 38,527 45,947 39,762 34,647 33,681 35,751 33,701 $ 162,135 $ 137,780 $ 135,522
Net income $ 97,126 $ 8,526 $ 13,595 $ 4,138 $ 4,869 $ 4,220 $ 7,350 $ 10,323      
Basic income per weighted-average share (in dollars per share) $ 2.58 $ 0.23 $ 0.37 $ 0.11 $ 0.13 $ 0.14 $ 0.24 $ 0.34 $ 3.31 $ 0.84 $ (0.60)
Diluted income per weighted-average share (in dollars per share) $ 2.47 $ 0.22 $ 0.35 $ 0.11 $ 0.13 $ 0.13 $ 0.24 $ 0.34 $ 3.17 $ 0.82 $ (0.60)
Valuation allowance $ (141,100)               $ (141,094)    
Impact of rate change on deferred taxes $ 45,100               $ 45,129 $ (383) $ 749