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Long-Term Bank Debt - Additional Information (Detail) (USD $) | 9 Months Ended |  | 1 Months Ended | 9 Months Ended |  | 9 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 Equipment Loan [Member] | Jul. 31, 2013 Equipment Loan [Member] | Aug. 31, 2014 Additional Equipment Loan [Member] | Sep. 30, 2014 Additional Equipment Loan [Member] | Jul. 29, 2014 Additional Equipment Loan [Member] | Sep. 30, 2014 Minimum [Member] | Sep. 30, 2014 Maximum [Member] | Sep. 30, 2014 Interest Rate Swap [Member]
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Credit facility borrowing capacity | $ 250,000,000 |  |  |  |  |  |  |  |  |
Maturity date of amended and restated credit agreement | Jul. 30, 2017 |  |  |  |  |  |  |  |  |
Credit facility borrowing base | 160,000,000 |  |  |  |  |  |  |  |  |
Credit facility, interest rate description | The Company's borrowing rates in the credit facility provide for base rate loans at the prime rate (3.25% at September 30, 2014) plus applicable margin utilization rates that range from 1.50% to 2.00%, and LIBO rate loans at LIBO published rates plus applicable utilization rates (2.50% to 3.00% at September 30, 2014). At September 30, 2014, the Company had in place one base rate loan and one LIBO rate loan with effective rates of 4.75% and 2.65%, respectively. |  |  |  |  |  |  |  |  |
Percentage for base rate loans at the prime rate | 3.25% |  | 3.95% |  |  | 3.40% |  |  |  | 0.563%
Minimum range for applicable margin utilization rate | 1.50% |  |  |  |  |  |  |  |  |
Maximum range for applicable margin utilization rate | 2.00% |  |  |  |  |  |  |  |  |
Debt instrument interest one base rate basis for effective rate | 4.75% |  |  |  |  |  |  |  |  |
LIBOR rate loans |  |  |  |  |  |  |  | 2.50% | 3.00% |
Effective LIBOR loan rate | 2.65% |  |  |  |  |  |  |  |  |
Outstanding borrowings under revolving credit facility | 86,500,000 |  |  |  |  |  |  |  |  |
Weighted-average interest rate of borrowings | 3.32% |  |  |  |  |  |  |  |  |
Credit facility remaining borrowing capacity | 73,500,000 |  |  |  |  | 1,200,000 |  |  |  |
Debt instrument basis weighted average interest rate spread on variable rate | 3.48% | 3.53% |  |  |  |  |  |  |  |
Equipment Loan, face amount |  |  |  | 10,000,000 |  |  | 6,000,000 |  |  |
Equipment Loan, monthly payment |  |  | 184,000 |  |  | 87,800 |  |  |  |
Equipment Loan, maturity date |  |  | Jul. 31, 2018 |  |  | Jul. 31, 2019 |  |  |  |
Company's bank debt |  |  | 8,000,000 |  |  | 4,800,000 |  |  |  | 75,000,000
Additional equipment Loan, drawings |  |  |  |  | 4,800,000 |  |  |  |  |
Interest swap agreements period |  |  |  |  |  |  |  |  |  | 2 years
Commenced date |  |  |  |  |  |  |  |  |  | Jan. 31, 2014
Settlement of interest rate swaps |  |  |  |  |  |  |  |  |  | $ 210,000

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- Definition Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + 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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