Before tax amount of additional minimum pension liability not yet recognized as a net periodic pension cost.

+ References+ Details

1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Accumulated Postretirement Benefit Obligation

-URI http://asc.fasb.org/extlink&oid=6503904

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 6

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph E1

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Projected Benefit Obligation

-URI http://asc.fasb.org/extlink&oid=6522206

+ Details

Employee Retirement Plans (Narrative) (Details) (USD $)					12 Months Ended						12 Months Ended
Employee Retirement Plans (Narrative) (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2011 Maximum [Member]	Dec. 31, 2010 Maximum [Member]	Dec. 31, 2012 Red Zone [Member] Maximum [Member]	Dec. 31, 2012 Yellow Zone [Member] Maximum [Member]	Dec. 31, 2012 Green Zone [Member] Minimum [Member]	Dec. 31, 2012 National Integrated Group Pension Plan [Member]	Dec. 31, 2012 Sheet Metal Workers' National Pension Plan [Member]	Dec. 31, 2012 Sheet Metal Workers' Pension Plan Of Northern California [Member]	Dec. 31, 2012 Supplemental Pension Plan at European Subsidiary [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation at January 1	$ 2,478,000	$ 2,653,000	$ 2,730,000	$ 3,131,000										$ 501,000
Pre-tax accumulated other comprehensive loss - retirement benefit liability adjustment														83,000
Net liability	2,555,000	2,766,000	3,138,000											418,000
Net amount recognized	$ (2,555,000)	$ (2,766,000)	$ (3,138,000)											$ (418,000)
Plans' funded percentage								65.00%	80.00%	80.00%
Company's contribution percentage					5.00%	5.00%	5.00%
EIN/ Pension Plan Number											226190618	526112463	516115939
Plan number											001	001	001