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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities
Net income	$ 10,474us-gaap_NetIncomeLoss	$ 7,296us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Depreciation	4,138us-gaap_Depreciation	4,042us-gaap_Depreciation
Amortization of intangibles	5,314us-gaap_AmortizationOfIntangibleAssets	5,471us-gaap_AmortizationOfIntangibleAssets
Deferred income taxes	1,642us-gaap_DeferredIncomeTaxExpenseBenefit	5,988us-gaap_DeferredIncomeTaxExpenseBenefit
Loss on debt extinguishment	5,286us-gaap_GainsLossesOnExtinguishmentOfDebt	0us-gaap_GainsLossesOnExtinguishmentOfDebt
Stock-based compensation	2,420us-gaap_ShareBasedCompensation	1,640us-gaap_ShareBasedCompensation
Accretion of debt discount	1,185us-gaap_AmortizationOfFinancingCosts	1,195us-gaap_AmortizationOfFinancingCosts
Changes in operating assets and liabilities
Accounts receivable	(21,686)us-gaap_IncreaseDecreaseInAccountsReceivable	1,494us-gaap_IncreaseDecreaseInAccountsReceivable
Inventories	(65,843)us-gaap_IncreaseDecreaseInInventories	(78,742)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other	3,216us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	(1,565)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Accounts payable and accrued liabilities	57,625us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	8,815us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
Other, net	458us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet	311us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet
Net cash provided by (used in) operating activities	4,229us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	(44,055)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Cash flows from investing activities
Capital expenditures	(2,975)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment	(2,078)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Net cash used in investing activities	(2,975)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	(2,078)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
Cash flows from financing activities
Proceeds from exercise of stock options	719us-gaap_ProceedsFromStockOptionsExercised	1,517us-gaap_ProceedsFromStockOptionsExercised
Borrowings under revolving credit facilities	163us-gaap_ProceedsFromLinesOfCredit	175us-gaap_ProceedsFromLinesOfCredit
Payments under revolving credit facilities	(163)us-gaap_RepaymentsOfLinesOfCredit	(175)us-gaap_RepaymentsOfLinesOfCredit
Principal payments under capital lease obligations	(432)us-gaap_RepaymentsOfLongTermCapitalLeaseObligations	(603)us-gaap_RepaymentsOfLongTermCapitalLeaseObligations
Proceeds from issuance of term loan credit facility	192,845us-gaap_ProceedsFromLongTermLinesOfCredit	0us-gaap_ProceedsFromLongTermLinesOfCredit
Principal payments under term loan credit facility	(192,845)us-gaap_RepaymentsOfLongTermLinesOfCredit	(693)us-gaap_RepaymentsOfLongTermLinesOfCredit
Principal payments under industrial revenue bond	(122)us-gaap_RepaymentsOfDebt	(117)us-gaap_RepaymentsOfDebt
Debt issuance costs paid	(1,994)us-gaap_PaymentsOfDebtIssuanceCosts	0us-gaap_PaymentsOfDebtIssuanceCosts
Stock repurchase	(19,929)us-gaap_PaymentsForRepurchaseOfEquity	(1,497)us-gaap_PaymentsForRepurchaseOfEquity
Net cash used in financing activities	(21,758)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	(1,393)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Net decrease in cash and cash equivalents	(20,504)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease	(47,526)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents at beginning of period	146,113us-gaap_CashAndCashEquivalentsAtCarryingValue	113,262us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents at end of period	$ 125,609us-gaap_CashAndCashEquivalentsAtCarryingValue	$ 65,736us-gaap_CashAndCashEquivalentsAtCarryingValue

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The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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

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Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

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The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer).

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The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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