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Quarterly Financial Information - Schedule of Quarterly Financial Information (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 311,188 us-gaap_SalesRevenueNet |  | $ 275,159 us-gaap_SalesRevenueNet |  | $ 282,493 us-gaap_SalesRevenueNet |  | $ 265,045 us-gaap_SalesRevenueNet |  | $ 291,429 us-gaap_SalesRevenueNet |  | $ 264,884 us-gaap_SalesRevenueNet |  | $ 285,859 us-gaap_SalesRevenueNet |  | $ 269,886 us-gaap_SalesRevenueNet |  | $ 1,133,885 us-gaap_SalesRevenueNet |  | $ 1,112,058 us-gaap_SalesRevenueNet |  | $ 1,110,443 us-gaap_SalesRevenueNet
Gross profit | 140,141 us-gaap_GrossProfit |  | 123,723 us-gaap_GrossProfit |  | 129,670 us-gaap_GrossProfit |  | 121,815 us-gaap_GrossProfit |  | 130,050 us-gaap_GrossProfit |  | 115,426 us-gaap_GrossProfit |  | 129,665 us-gaap_GrossProfit |  | 121,704 us-gaap_GrossProfit |  | 515,349 us-gaap_GrossProfit |  | 496,845 us-gaap_GrossProfit |  |
Continuing operations | 33,119 us-gaap_IncomeLossFromContinuingOperations |  | 18,674 us-gaap_IncomeLossFromContinuingOperations |  | 22,132 us-gaap_IncomeLossFromContinuingOperations |  | 13,522 us-gaap_IncomeLossFromContinuingOperations |  | 24,929 us-gaap_IncomeLossFromContinuingOperations |  | 18,987 us-gaap_IncomeLossFromContinuingOperations |  | 23,315 us-gaap_IncomeLossFromContinuingOperations |  | 18,627 us-gaap_IncomeLossFromContinuingOperations |  | 87,447 us-gaap_IncomeLossFromContinuingOperations |  | 85,858 us-gaap_IncomeLossFromContinuingOperations |  | 87,557 us-gaap_IncomeLossFromContinuingOperations
Income from continuing operations, Basic (dollars per share) | $ 0.88 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | [1] | $ 0.50 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | [1] | $ 0.59 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | [1] | $ 0.37 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | [1] | $ 0.67 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | [1] | $ 0.51 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | [1] | $ 0.63 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | [1] | $ 0.50 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | [1] | $ 2.34 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | [1] | $ 2.31 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | [1] | $ 2.37 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare
Income from continuing operations, Diluted (dollars per share) | $ 0.87 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | [1] | $ 0.49 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | [1] | $ 0.58 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | [1] | $ 0.36 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | [1] | $ 0.66 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | [1] | $ 0.51 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | [1] | $ 0.62 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | [1] | $ 0.49 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | [1] | $ 2.30 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | [1] | $ 2.28 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | [1] | $ 2.34 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare
Net sales | 12,222 us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue |  | 14,645 us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue |  | 10,589 us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue |  | 10,060 us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue |  | 12,142 us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue |  | 13,361 us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue |  | 13,836 us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue |  | 13,353 us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue |  | 47,516 us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue |  | 52,692 us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue |  | 58,461 us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue
Gross profit | 2,122 us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss |  | 2,638 us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss |  | 2,134 us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss |  | 2,363 us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss |  | 2,428 us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss |  | 2,790 us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss |  | 3,215 us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss |  | 3,078 us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss |  | 9,257 us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss |  | 11,511 us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss |  |
Income from discontinued operations | $ (432)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity |  | $ 631 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity |  | $ 356 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity |  | $ 504 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity |  | $ 482 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity |  | $ 514 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity |  | $ 734 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity |  | $ 659 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity |  | $ 1,059 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity |  | $ 2,389 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity |  | $ 3,080 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
Income from discontinued operations, Basic (dollars per share) | $ (0.01)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | [1] | $ 0.02 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | [1] | $ 0.01 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | [1] | $ 0.01 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | [1] | $ 0.01 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | [1] | $ 0.01 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | [1] | $ 0.02 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | [1] | $ 0.02 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | [1] | $ 0.03 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | [1] | $ 0.06 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | [1] | $ 0.08 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
Income from discontinued operations, Diluted (dollars per share) | $ (0.01)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | [1] | $ 0.02 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | [1] | $ 0.01 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | [1] | $ 0.01 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | [1] | $ 0.01 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | [1] | $ 0.01 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | [1] | $ 0.02 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | [1] | $ 0.02 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | [1] | $ 0.03 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | [1] | $ 0.06 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | [1] | $ 0.08 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
[1] | Per share amounts are calculated independently for each period presented; therefore, the sum of the quarterly per share amounts may not equal the per share amounts for the year.

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