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Stock-Based Compensation Plans - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2016 USD ($) Directors Executives Stock_Plan shares | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock option compensation | $ 3,300,000 | $ 3,700,000 | $ 2,600,000
Accrued liabilities | 94,300,000 | 84,100,000 |
Maximum cash bonus under long-term incentive plan | 3,000,000 |  |
Cash-settled long-term incentives | $ 3,000,000 |  |
Stock Options Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of active stock option plans | Stock_Plan | 5 |  |
Number of active stock option plans for employees | Stock_Plan | 2 |  |
Number of active stock option plans for non-employee directors | Directors | 1 |  |
Number of active stock option plans for key executives | Executives | 1 |  |
Expiration term for stock granted | 10 years |  |
Aggregate number of shares of common stock reserved for issuance which can be granted | shares | 2,640,000 |  |
Number exercisable and fully vested | shares | 68,796 |  |
Fully vested stock options with performance conditions attached | shares | 20,417 |  |
Stock option compensation | $ 3,300,000 | 3,700,000 | 2,600,000
Total intrinsic value exercised | 2,800,000 | 2,400,000 | 900,000
Total compensation cost related to non-vested stock options not yet recognized | $ 3,600,000 |  |
Expected compensation cost recognized over the weighted-average period | 1 year 11 months 1 day |  |
Cash tax benefit realized from stock option exercises | $ 900,000 | 1,300,000 | 900,000
Excess tax benefit | $ 1,000,000 | 500,000 | 400,000
Stock Options Plan [Member] | Minimum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Range of stock vesting period | 24 months |  |
Stock Options Plan [Member] | Maximum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Range of stock vesting period | 6 years |  |
Stock Equivalent Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Expiration term for stock granted | 10 years |  |
Fully vested stock options with performance conditions attached | shares | 46,260 |  |
Total intrinsic value exercised | $ 1,800,000 | 2,400,000 | 3,700,000
Expected compensation cost recognized over the weighted-average period | 1 year 4 months 24 days |  |
Accrued liabilities | $ 9,800,000 |  |
Number of exercisable SEUs | shares | 48,964 |  |
Compensation cost | $ 4,700,000 | $ 4,900,000 | $ 2,000,000
Stock Equivalent Units [Member] | Minimum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Range of stock vesting period | 11 months |  |
Stock Equivalent Units [Member] | Maximum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Range of stock vesting period | 4 years |  |

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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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