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Summarized Statement of Comprehensive Income Information for Vasconia in USD and MXN (Detail)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2012
USD ($)
Jun. 30, 2011
USD ($)
Jun. 30, 2012
USD ($)
Jun. 30, 2011
USD ($)
Jun. 30, 2012
Grupo Vasconia S.A.B.
USD ($)
Jun. 30, 2012
Grupo Vasconia S.A.B.
MXN
Jun. 30, 2011
Grupo Vasconia S.A.B.
USD ($)
Jun. 30, 2011
Grupo Vasconia S.A.B.
MXN
Jun. 30, 2012
Grupo Vasconia S.A.B.
USD ($)
Jun. 30, 2012
Grupo Vasconia S.A.B.
MXN
Jun. 30, 2011
Grupo Vasconia S.A.B.
USD ($)
Jun. 30, 2011
Grupo Vasconia S.A.B.
MXN
Schedule of Equity Method Investments [Line Items]                        
Net sales $ 94,939 $ 90,371 $ 203,980 $ 182,144 $ 40,195 543,184 $ 30,909 362,784 $ 68,882 915,673 $ 59,480 708,261
Gross Profit 35,374 34,046 75,834 67,436 8,664 117,081 8,364 98,168 16,832 223,145 16,447 195,905
Income from operations 2,153 4,351 5,385 4,328 3,144 42,481 3,127 36,697 6,465 85,615 6,452 76,903
Net income $ 559 $ 2,063 $ 1,903 $ 1,114 $ 2,252 30,426 $ 2,116 24,838 $ 4,216 55,937 $ 4,247 50,606