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Long-term Debt - Additional Information (Detail) (USD $) | 9 Months Ended |  |  | 9 Months Ended |  |  |  | 9 Months Ended |  | 9 Months Ended |  | 0 Months Ended | 9 Months Ended | 0 Months Ended
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Sep. 30, 2014 | Jul. 08, 2014 | Dec. 31, 2013 | Sep. 30, 2014 Scenario Forecast [Member] Payable from September 30, 2016 Through June 30, 2018 [Member] | Sep. 30, 2014 Scenario Forecast [Member] Payable from September 30, 2018 Though June 30, 2019 [Member] | Dec. 31, 2013 LIBOR [Member] | Dec. 31, 2013 Base Rate [Member] | Sep. 30, 2014 New LOC [Member] | Jul. 08, 2014 New LOC [Member] | Sep. 30, 2014 Term Loan [Member] | Jul. 08, 2014 Term Loan [Member] | Sep. 30, 2014 Term Loan [Member] Scenario Forecast [Member] Payable Starting on December 31, 2014 [Member] | Jul. 08, 2014 New Letter of Credit [Member] | Jul. 08, 2014 Swing Lines Loan [Member] | Jul. 08, 2014 Old Letter of Credit [Member] | Jul. 08, 2014 New Credit Agreement [Member] | Sep. 30, 2014 New Credit Agreement [Member] | Jul. 08, 2014 New Credit Agreement [Member] Maximum [Member] | Jul. 08, 2014 New Credit Agreement [Member] Minimum [Member]
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum limit for credit facility |  | $ 100,000,000 |  |  |  |  |  |  | $ 75,000,000 |  |  |  | $ 10,000,000 | $ 5,000,000 | $ 10,000,000 |  |  |  |
Term loan | 25,000,000 |  |  |  |  |  |  |  |  |  | 25,000,000 |  |  |  |  |  |  |  |
Term loan maturity date | Jul. 07, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility, interest rate description | The New LOC and Term Loan bear interest at either 1) the Eurodollar rate ("LIBOR") or 2) the Base Rate (which approximates Prime Rate), plus a margin based on the type of rate applied and the value (represented as a ratio) of our total debt to earnings (as defined in our New Credit Agreement). |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | The New Credit Agreement also contains various restrictive non-financial covenants and a provision requiring that, upon an event of default (as defined by the New Credit Agreement), amounts outstanding under the New LOC and Term Loan would bear interest at the rate as determined above plus 2%. |  |
Credit facility, amortization description |  |  |  |  |  |  |  |  |  | The Term Loan amortizes in quarterly principal payments of $313 starting on December 31, 2014, with the quarterly payment amount increasing to $469 from September 30, 2016 through June 30, 2018, and further increasing to $625 from September 30, 2018 through June 30, 2019. Any outstanding principal balance on the Term Loan is due on the Maturity Date. |  |  |  |  |  |  |  |  |
Credit facility amortization, principal payment |  |  |  | 469,000 | 625,000 |  |  |  |  |  |  | 313,000 |  |  |  |  |  |  |
Line of credit outstanding |  |  | 27,269,000 |  |  | 24,500,000 | 2,769,000 | 0 |  | 25,000,000 |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  | 2.25% | 4.25% |  |  |  |  |  |  |  |  |  |  |  |
Outstanding letters of credit | 9,815,000 |  | 7,175,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available borrowings under LOC |  |  | $ 15,556,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility, covenant terms |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | The New Credit Agreement contains financial covenants requiring us to maintain 1) a leverage ratio of debt to earnings, as adjusted for certain items and as defined by the Agreement, of no greater than 3.50 to 1.00 and decreasing over time to 2.75 to 1.00 by March 31, 2016, and 2) a fixed charge coverage ratio, as adjusted for certain items, of no less than 1.10 to 1.00. |  |
Leverage Ratio, covenants requirements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.50 | 2.75
Fixed coverage ratio, covenants requirements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.10
Contingent interest rate increase |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.00% |  |  |

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- Definition Debt Instrument Leverage Ratio Covenant + References No definition available. + Details
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- Definition Line Of Credit Facility Additional Interest Rate + References No definition available. + Details
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- Definition Description of minimum financial levels (for example, tangible net worth and working capital) and achievement of certain financial ratios (for example, working capital ratio and debt service coverage ratio), and adherence to certain clauses which generally require or restrict certain actions (for example, entering into a debt arrangement with equal or greater seniority, and selling or discontinuing a certain business segment or material subsidiary) to be in compliance with the covenant clauses of the debt agreement. May also include a discussion of the adverse consequences that would result if the entity violates or fails to satisfy the covenants. + 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 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 + Details
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- Definition Description of the frequency of periodic payments (monthly, quarterly, annual). + References Reference 1: 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + 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(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Amount of the required periodic payment applied to principal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. + References Reference 1: 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
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