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Debt (Details) | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2011 USD ($) | Dec. 25, 2010 USD ($) | Dec. 26, 2009 USD ($) | Dec. 31, 2011 Mueller Xingrong Line of Credit [Member] USD ($) | Dec. 31, 2011 Mueller Xingrong Line of Credit [Member] CNY | Dec. 25, 2010 Mueller Xingrong Line of Credit [Member] USD ($) | Dec. 31, 2011 Credit Agreement [Member] USD ($) | Dec. 31, 2011 6% Subordinated Debentures [Member] USD ($) | Dec. 26, 2009 6% Subordinated Debentures [Member] USD ($) | Dec. 25, 2010 6% Subordinated Debentures [Member] USD ($) | Dec. 31, 2011 2001 Series IRB [Member] USD ($) | Dec. 25, 2010 2001 Series IRB [Member] USD ($) | Dec. 31, 2011 Other [Member] USD ($) | Dec. 25, 2010 Other [Member] USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt | $ 197,741,000 | $ 190,246,000 |  |  |  |  |  | $ 148,176,000 |  | $ 148,176,000 | $ 9,250,000 | $ 10,000,000 | $ 50,000 | $ 50,000
Debt, stated interest rate (in hundredths) |  |  |  | 6.89% | 6.89% |  |  | 6.00% |  | 6.00% | 1.23% |  |  |
Debt instrument maturity date |  |  |  |  |  |  |  | Nov. 01, 2014 |  |  | Dec. 31, 2021 |  |  |
Debt instrument, Face amount |  |  |  |  |  |  |  | 299,500,000 |  |  |  |  |  |
Repurchase and extinguishment of debt |  |  |  |  |  |  |  | 151,300,000 |  |  |  |  |  |
Extinguishment of debt |  |  |  |  |  |  |  |  | 500,000 |  |  |  |  |
Debentures redemption price per principal amount (in hundredths) |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit outstanding |  |  |  | 40,265,000 |  | 32,020,000 |  |  |  |  |  |  |  |
Less current portion of debt | (41,265,000) | (32,020,000) |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt | 156,476,000 | 158,226,000 |  |  |  |  |  |  |  |  |  |  |  |
Maturity date of credit facility |  |  |  | 2012-07-28 | 2012-07-28 |  | 2016-03-07 |  |  |  |  |  |  |
Line of credit facility maximum borrowing capacity |  |  |  | 50,000,000 | 350,000,000 |  | 350,000,000 |  |  |  |  |  |  |
Debt instrument variable rate basis |  |  |  |  |  |  | Borrowings under the Credit Facility bear interest, at the Company's option, at LIBOR or Base Rate as defined by the Credit Agreement, plus a variable premium. LIBOR advances may be based upon the one, two, three, or six-month LIBOR. |  |  |  |  |  |  |
Basis spread on variable rate, LIBOR, minimum (in hundredths) |  |  |  |  |  |  | 1.50% |  |  |  |  |  |  |
Basis spread on variable rate, LIBOR, maximum (in hundredths) |  |  |  |  |  |  | 2.00% |  |  |  |  |  |  |
Basis spread on variable rate, LIBOR, (in hundredths) |  |  |  |  |  |  | 1.75% |  |  |  |  |  |  |
Basis spread on variable rate, Base Rate loans, minimum (in hundredths) |  |  |  |  |  |  | 0.50% |  |  |  |  |  |  |
Basis spread on variable rate, Base Rate loans, maximum (in hundredths) |  |  |  |  |  |  | 1.00% |  |  |  |  |  |  |
Basis spread on variable rate, Base Rate loans (in hundredths) |  |  |  |  |  |  | 0.75% |  |  |  |  |  |  |
Credit facility commitment fee, minimum (in hundredths) |  |  |  |  |  |  | 0.25% |  |  |  |  |  |  |
Credit facility commitment fee, maximum (in hundredths) |  |  |  |  |  |  | 0.375% |  |  |  |  |  |  |
Outstanding letters of credit |  |  |  |  |  |  | 11,300,000 |  |  |  |  |  |  |
Terms of the letters of credit (in years) |  |  |  |  |  |  | 1Y |  |  |  |  |  |  |
Number of banks in the credit agreement syndicate |  |  |  | 4 | 4 |  |  |  |  |  |  |  |  |
Initial line of credit facility maximum borrowing capacity |  |  |  |  | 330,000,000 |  |  |  |  |  |  |  |  |
Initial maturity date of previous credit agreement |  |  |  | Jul. 16, 2011 | Jul. 16, 2011 |  |  |  |  |  |  |  |  |
Aggregate annual maturities of debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
2012 | 41,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |
2013 | 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
2014 | 149,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |
2015 | 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
2016 | 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Thereafter | 4,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Interest paid | $ 10,800,000 | $ 11,400,000 | $ 10,100,000 |  |  |  |  |  |  |  |  |  |  |

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- Definition Amount of long-term debt maturing in year two following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 47 -Paragraph 10 -Subparagraph b -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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Balance Type: | credit
Period Type: | instant

X
- Definition Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year (current maturities) or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Data Type: | xbrli:monetaryItemType
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Period Type: | instant