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Goodwill - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Apr. 19, 2013 | Dec. 24, 2012 | Jun. 30, 2013 | Jun. 30, 2013 | Dec. 31, 2012
Business Acquisition [Line Items] |  |  |  |  |
Acquisition related contingent consideration |  |  | $ 4.5 | $ 4.5 | $ 4.3
Strata [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Voting equity interests acquired |  | 100.00% |  |  |
Annual sales |  |  |  |  | 20
Date of acquisition |  |  |  | Dec. 24, 2012 |
Purchase price |  | 53.1 |  |  |
Payable in cash |  |  | 5.0 | 5.0 |
Acquisition related contingent consideration |  |  | 4.5 | 4.5 |
Transfer of common stock |  |  |  | 60,368 |
Fair value of pre determined target at acquisition date |  |  |  | 2.0 |
Cash proceeds from acquisition post closing working capital adjustment | 0.6 |  |  |  |
Reduction in other net assets |  |  | 0.4 |  |
Increase in goodwill |  |  | $ 0.4 |  |

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- Definition Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e845-128460 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Acquisition Date -URI http://asc.fasb.org/extlink&oid=6919109 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e848-128460 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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