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Stock-Based Compensation (Deferred and Restricted Stock) - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified | 9 Months Ended | 0 Months Ended |  | 9 Months Ended | 3 Months Ended | 9 Months Ended
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Oct. 04, 2014 | May 31, 2013 Chief Executive Officer | May 31, 2013 Restricted Stock Award Chief Executive Officer | Oct. 04, 2014 Deferred Stock | Jul. 12, 2014 Deferred Stock Annual Grant Awards Non Employee Directors | Oct. 04, 2014 Deferred Stock Annual Grant Awards Non Employee Directors | Oct. 04, 2014 Deferred Stock Annual Grant Awards Non Employee Directors Minimum | Oct. 04, 2014 Deferred Stock Retainer Conversion | Oct. 04, 2014 Deferred Stock Retainer Conversion Minimum | Oct. 04, 2014 Deferred Stock Activity
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Deferred shares distributed |  |  |  |  |  |  |  | 18,330 |  |
Retainers conversion into deferred shares |  |  |  |  |  |  |  | 130.00% |  |
Vesting period |  |  |  |  |  |  | 1 year |  | 2 years |
Aggregate shares converted |  |  |  |  | 60,300 |  |  | 36,425 |  |
Deferred shares distributed |  |  |  | 105,621 |  | 27,075 |  |  |  |
Restricted stock award |  | $ 1.3 |  |  |  |  |  |  |  |
Restricted shares issued |  | 58,500 |  |  |  |  |  |  |  |
Restricted shares per share |  |  | $ 22.25 |  |  |  |  |  |  |
Unrecognized compensation cost related to nonvested restricted stock granted by the EPIP | 6.2 |  |  |  |  |  |  |  |  | 2.1
Expected weighted-average period to recognize compensation cost (years) | 1 year 1 month 6 days |  |  |  |  |  |  |  |  | 1 year 7 months 6 days
Award vesting tax windfall |  |  |  |  |  |  |  |  |  | $ 0.6

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- Definition Amount of increase in additional paid in capital (APIC) resulting from a tax benefit associated with share-based compensation plan other than an employee stock ownership plan (ESOP). Includes, but is not limited to, excess tax benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 740 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6419406&loc=d3e23524-113945 + Details
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