XML 130 R61.htm IDEA: XBRL DOCUMENT v3.6.0.2
Schedule of Performance Stock Units Activity (Detail) - Performance Stock Units
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2016
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding at December 31, 2015, Shares | shares 135
Performance stock units granted, Shares | shares 84
Restricted Stock Units forfeited, Shares | shares (13)
Outstanding at December 31, 2016, Shares | shares 206
Performance stock units outstanding, at December 31,2016, Intrinsic Value | $ $ 9,276
Outstanding at December 31, 2015, Weighted Average Grant Date Fair Value | $ / shares $ 28.62
Performance stock units granted, Weighted Average Grant Date Fair Value | $ / shares 23.83
Performance stock units forfeited, Weighted Average Grant Date Fair Value | $ / shares 29.11
Outstanding at December 31, 2016, Weighted Average Grant Date Fair Value | $ / shares $ 26.64