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Equity-Based Compensation, Profit Sharing and Deferred Compensation Plans - Summary of Equity-Based Compensation Plans with Grants Outstanding (Parenthetical) (Detail) - shares | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015
Options [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Options outstanding |  | 1,076,000 | 1,096,000
Two Thousand Ten Equity Plan |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Shares Authorized | [1] | 700,000 |
Shares Available to Issue | [1] | 44,000 |
Two Thousand Ten Equity Plan | RSUs [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Shares Authorized |  | 240,000 |
Restricted share units outstanding |  | 16,000 | 51,000
Shares Available to Issue |  | 38,000 |
Two Thousand Ten Equity Plan | Options [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Options outstanding |  | 266,000 |
Shares Available to Issue |  | 44,000 |
Restricted share units vesting period or Option vesting period |  | 4 years |
Options vesting rights |  | over four years in 25% increments beginning on December 31, 2018 |
2014 Plan [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Shares Authorized | [2] | 950,000 |
Shares Available to Issue | [2] | 269,000 |
2014 Plan [Member] | Options [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Percentage of options vesting rights |  | 25.00% |
Performance metric period |  | 3 years |
Restricted share units vesting period or Option vesting period |  | 4 years |
Options vesting rights |  | over four years in 25% increments beginning on December 31, 2016, or later based on the date of grant |
2014 Plan [Member] | Options [Member] | Option Grant Solely Contingent upon Continued Employment or Continued Service as a Director |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Percentage of options vesting rights |  | 50.00% |
2014 Plan [Member] | Options [Member] | Option Grant Contingent upon Continued Employment or Service as a Director and Achievement of Performance Metric |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Percentage of options vesting rights |  | 50.00% |
[1] | During 2010, the Company’s shareholders approved the 2010 Equity Incentive Plan (the “2010 Plan”). The 2010 Plan authorizes the Company to issue Options and RSUs to key management employees, including executive officers and Board members. Of the 700 aggregate shares available to issue, up to 240 may be granted in the form of RSUs. There were 266 Options and 16 RSUs outstanding as of December 31, 2016. Of the 44 shares available to be issued under the 2010 Plan, 38 may be granted as RSUs.
[2] | During 2014, the Company’s shareholders approved the 2014 Equity Incentive Plan (the “2014 Plan”). The 2014 Plan authorizes the Company to issue Options to key management employees, including executive officers and Board members. Option grants under the 2014 Plan are generally divided such that vesting for 50% of the Option grant is solely contingent upon continued employment or continued service as a Director, while vesting for the remaining 50% of the Option grant is contingent upon both continued employment or service as a Director and the achievement of a performance metric. The performance metric is based on the Company’s return on capital performance during a specified three year period based on the date of Option grant, with the initial performance period being 2014 through 2016. Options granted under the 2014 Plan vest annually over four years in 25% increments beginning on December 31, 2016, or later based on the date of grant.

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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References No definition available. + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Description of award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares, and be entitled to the cash proceeds of such sale. For example, vesting may be expressed as being 25 percent of the shares under option on each anniversary of the grant date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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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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- Definition Number of options outstanding, including both vested and non-vested options. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Percentage of vesting of share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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