Annual report pursuant to Section 13 and 15(d)

Share-based Compensation - Additional Information (Detail)

v3.6.0.2
Share-based Compensation - Additional Information (Detail)
12 Months Ended
Dec. 31, 2016
plan
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of incentive plans | plan 3
Number of shares of common stock to be granted under equity incentive awards 1,500,000
Shares available for issuance under the Plan 646,664
Stock options, expiration term from date of grant 10 years
Minimum [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Period of continuous service 3 years
Minimum [Member] | Restricted stock awards [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Stock options, expiration term from date of grant 3 years
Maximum [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Period of continuous service 5 years
Maximum [Member] | Restricted stock awards [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Stock options, expiration term from date of grant 5 years