XML 96 R82.htm IDEA: XBRL DOCUMENT v3.8.0.1
Performance Option Weighted Average Exercise Prices for Options Granted and Exercisable and Weighted Average Remaining Contractual Life for Options Outstanding (Detail) - Performance Incentive Stock Option Plan - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Shares, Outstanding 81,666 82,334
Number of Shares, Expected to Vest 81,666 75,312
Weighted Average Exercise Price, Outstanding $ 11.49 $ 11.49
Weighted Average Exercise Price, Expected to Vest $ 11.49 $ 11.49
Weighted Average Remaining Life, Outstanding 0 years 12 months
Weighted Average Remaining Contractual Life, Expected to Vest   12 months
Intrinsic Value, Outstanding $ 666 $ 631
Intrinsic Value, Expected to Vest $ 666 $ 577