Agreement termination month and year.

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Commencement Of Agreement Month And Year

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Payment For Settlement Of Interest Rate Swap

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Swap Agreement Month And Year

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Term of derivative interest rate swap.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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No definition available.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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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))
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The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

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No definition available.

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Face (par) amount of debt instrument at time of issuance.

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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The average effective interest rate during the reporting period.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Amount of the required periodic payments including both interest and principal payments.

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Amount of the required periodic payments applied to principal.

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Weighted average interest rate of debt outstanding.

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No definition available.

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Description of the inputs and valuation technique(s) used to measure fair value.

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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.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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Date the credit facility terminates, in CCYY-MM-DD format.

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Date the credit facility first became available, in CCYY-MM-DD format.

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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.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Weighted average interest rate of long-term debt outstanding calculated at point in time.

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No definition available.

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The cash inflow from bank borrowing during the year.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
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Long-Term Debt - Additional Information (Detail) - USD ($)					1 Months Ended		12 Months Ended
	Jan. 26, 2018	Jan. 12, 2018	Feb. 15, 2017	Jun. 26, 2015	Dec. 31, 2014	Aug. 31, 2014	Dec. 31, 2017	Dec. 31, 2016	Dec. 22, 2017	Jul. 29, 2014	Jul. 31, 2013
Credit Agreement [Member]
Debt Instrument [Line Items]
Maturity date of amended and restated credit agreement							Jul. 30, 2017
Outstanding borrowings under revolving credit facility							$ 47,700,000
Weighted-average interest rate of borrowings							5.21%
Credit facility remaining borrowing capacity							$ 37,300,000
Interest swap agreements period							2 years
Settlement of interest rate swaps								$ 7,000
Additional Equipment Loan [Member]
Debt Instrument [Line Items]
Credit facility remaining borrowing capacity						$ 1,200,000
Company's bank debt							$ 1,870,000
Equipment Loan, face amount										$ 6,000,000
Percentage for base rate loans at the prime rate						3.40%
Equipment Loan, monthly payment						$ 87,800
Equipment Loan, maturity date							Jul. 31, 2019
Additional equipment Loan, drawings					$ 500,000	$ 4,800,000
Equipment Loan, interest rate description							Interim draws on this facility carried a floating interest rate, payable monthly at the LIBO published rate plus 2.50% and on June 26, 2015 converted into a fixed term loan, with a rate of 3.50% and requiring monthly payments
Fair Value Measurements, Valuation Techniques							Discounted cash flow model
Additional Equipment Loan [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure							$ 3,110,000,000	$ 6,147,000,000
Revolving Line of Credit and Letter of Credit Facility [Member] \| Credit Agreement [Member]
Debt Instrument [Line Items]
Credit facility borrowing capacity							$ 250,000,000
Fixed Term Loan [Member] \| Additional Equipment Loan [Member]
Debt Instrument [Line Items]
Equipment Loan, monthly payment				$ 8,700
Equipment Loan, maturity date							Jun. 26, 2020
Equipment Loan, Interest rate on fixed loans							3.50%
2017 Credit Agreement [Member]
Debt Instrument [Line Items]
Credit facility borrowing capacity			$ 300,000,000
Maturity date of amended and restated credit agreement			Feb. 15, 2021
Credit agreement date			Feb. 15, 2017
Credit facility borrowing base									$ 85,000,000
London Interbank Offered Rate (LIBOR) [Member] \| Additional Equipment Loan [Member]
Debt Instrument [Line Items]
LIBOR rate loans							2.50%
Base Rate And Libor [Member] \| Credit Agreement [Member]
Debt Instrument [Line Items]
Debt instrument basis weighted average interest rate spread on variable rate							4.97%	3.93%
Subsequent Event [Member]
Debt Instrument [Line Items]
Percentage for base rate loans at the prime rate	3.50%
Equipment Loan, monthly payment	$ 7,986
Equipment Loan, maturity date	Jun. 26, 2020
Equipment Loan, principal payment amount		$ 20,858
Equipment Loan [Member]
Debt Instrument [Line Items]
Company's bank debt							$ 1,267,000
Equipment Loan, face amount											$ 10,000,000
Percentage for base rate loans at the prime rate							3.95%
Equipment Loan, monthly payment							$ 184,000
Equipment Loan, maturity date							Jul. 31, 2018
Interest Rate Swap [Member] \| Credit Agreement [Member]
Debt Instrument [Line Items]
Swap agreement date							2012-07
Commenced date							2014-01
Termination date							2016-01
Company's bank debt							$ 75,000,000
Interest Rate Swap [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Credit Agreement [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate							0.563%