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Employee Retirement Plans (Schedule Of Contributions Made By The Company To Each Multiemployer Plan) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items] |  |  |
Contributions | $ 328 | $ 333 | $ 307
National Integrated Group Pension Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Contributions | 222 | 202 | 186
Sheet Metal Workers' National Pension Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Contributions | 78 | 98 | 50
Sheet Metal Workers' Pension Plan Of Northern California [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Contributions | 28 | 33 | 63
Western Metal Industry Pension Fund [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Contributions |  |  | $ 8

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- Definition Amount of contributions made to multiemployer plans by the employer. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=14450570&loc=SL14450702-114947 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=14450570&loc=SL14450691-114947 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=14450570&loc=SL14450657-114947 + Details
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