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Stock Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation expense | $ 3,704 | $ 2,595 | $ 2,239
Compensation expense related with stock options | 915 | 1,274 | 1,437
Compensation expense for stock awards | $ 2,396 | $ 1,321 | $ 802
Maximum number of shares authorized to issued as options | 827,476 |  |
Term life of options | 10 years |  |
Vesting period of stock issue | 3 years | 3 years | 3 years
Number of options granted | 55,000 | 108,620 | 353,600
Weighted average grant date fair value of the options granted | $ 12.61 | $ 9.48 | $ 5.17
Unrecognized compensation costs to be recognized for stock options | $ 600 |  |
Unrecognized compensation costs to be recognized for restricted stocks | $ 1,100 |  |
Unrecognized compensation costs, period for recognition | 2 years |  |
Cash proceeds from the exercise of options | $ 2,041 | $ 1,671 | $ 4,013
Total intrinsic value of options exercised | $ 2,600 | $ 2,000 | $ 1,400
Common stock issued | 114,475 | 114,300 | 94,800
Weighted average grant date fair value Per Share of the Stock Award | $ 23.72 |  |
Unrecognized share-based compensation expense | $ 1,500 |  |
Unrecognized compensation expense expected to be recognized | 2 years |  |
Performance Based Stock Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation expense | $ 400 |  |
TSR Awards [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of options granted | 35,775 |  |
Weighted average grant date fair value of the options granted | $ 28.61 |  |
Percentage of shares issuable based on threshold performance | 50.00% |  |
Percentage of shares issuable based on target performance | 100.00% |  |
Percentage of shares issuable based on maximum performance | 150.00% |  |
ROIC Awards [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of options granted | 35,775 |  |
Weighted average grant date fair value of the options granted | $ 25.16 |  |
Percentage of shares issuable based on threshold performance | 35.00% |  |
Percentage of shares issuable based on target performance | 100.00% |  |
Percentage of shares issuable based on maximum performance | 150.00% |  |
Key Employees [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period of stock issue | 3 years |  |
Non-employee Directors [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period of stock issue | 1 year |  |
Selling, General and Administrative Expense [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation expense | $ 3,700 | $ 2,600 | $ 2,200

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- Definition The total cash inflow associated with the amount received from holders to acquire the entity's shares under incentive and share awards, including stock option exercises. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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