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v3.8.0.1

Debt (Additional Information) (Details) |  |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Feb. 17, 2017 USD ($) | Jun. 18, 2015 | Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) capital_lease_agreement | Mar. 31, 2017 USD ($)
Debt Instrument [Line Items] |  |  |  |  |
Outstanding line of credit issuance costs |  |  | $ 2,100,000 |  |
Amortization expense |  |  | $ 100,000 |  |
Debt instrument, leverage ratio, maximum |  |  | 2.75 |  |
Capital lease obligation |  |  |  | $ 700,000 |
Amortization expense related to the capital lease |  |  | $ 100,000 |  |
Capital lease accumulated depreciation |  |  | 200,000 |  |
Interest expense on capital lease |  |  | 100,000 |  |
Number of capital lease agreements | capital_lease_agreement |  |  |  | 2 |
Maximum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Dividends |  |  | $ 20,000,000 |  |
Credit Agreement |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Variable rate lower range basis spread |  | 37.50% |  |  |
Variable rate higher range basis spread |  | 75.00% |  |  |
Line of credit, base reference rate description |  | The base reference rate is the greater of the prime rate; federal funds effective rate (or the overnight bank funding rate, if greater) plus 50 basis points; or adjusted 1-month LIBOR plus 100 basis points. |  |  |
Amended Credit Facility | Federal Funds Effective Swap Rate |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Variable rate lower range basis spread |  | 0.50% |  |  |
Amended Credit Facility | LIBOR |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Variable rate higher range basis spread |  | 1.00% |  |  |
Third Amended Credit Agreement |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Leverage ratio | 3.25 |  |  |  |
One-time leverage ratio maximum option | 3.50 |  |  |  |
ICR covenant limit | 3.00 |  |  |  |
Eurocurrency loans | Credit Agreement |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit, LIBOR rate, minimum spread |  | 137.50% |  |  |
Line of credit, LIBOR rate, maximum spread |  | 175.00% |  |  |
Revolving Credit Facility | Third Amended Credit Agreement |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, term | 5 years |  |  |  |
Maximum borrowing capacity | $ 450,000,000 |  |  |  |
Additional borrowing capacity | $ 175,000,000 |  |  |  |
Outstanding borrowings |  |  |  | $ 131,000,000 |
Revolving Credit Facility | Third Amended Credit Agreement | Minimum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Unused capacity, commitment fee percentage |  |  | 20.00% |  |
Revolving Credit Facility | Third Amended Credit Agreement | Maximum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Unused capacity, commitment fee percentage |  |  | 30.00% |  |
Interest rate swap | Revolving Credit Facility | Third Amended Credit Agreement |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Hedged balance on debt instrument |  |  |  |  | $ 75,000,000
Germany |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Capital lease, expiration date |  |  | 44561 |  |
Capital lease obligation |  |  | $ 5,700,000 |  |
Amortization expense related to the capital lease |  |  | 100,000 |  |
Capital lease accumulated depreciation |  |  | $ 3,200,000 | $ 3,300,000 |

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- Definition Debt Instrument, Debt Covenant, Allowed Dividend Payments + References No definition available. + Details
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- Definition Debt Instrument Higher Range Basis Spread On Variable Rate + References No definition available. + Details
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- Definition Debt Instrument, Leverage Ratio, Maximum + References No definition available. + Details
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- Definition Debt Instrument Lower Range Basis Spread On Variable Rate + References No definition available. + Details
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- Definition Initial Lease Term Expiration Year + References No definition available. + Details
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- Definition LIBORS Spread Maximum + References No definition available. + Details
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- Definition LIBORS Spread Minimum + References No definition available. + Details
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- Definition Leverage Ratio, Maximum + References No definition available. + Details
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- Definition Line of Credit Facility, Additional Borrowing Capacity + References No definition available. + Details
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- Definition Maximum Leverage Ratio Option + References No definition available. + Details
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- Definition Number of Capital Lease Agreements + References No definition available. + Details
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- Definition Amount of amortization expense attributable to debt issuance costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(8)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(8)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Definition The expense charged against earnings for the periodic recognition of capitalized leases. This element may apply to energy companies that lease mineral producing properties and to other enterprises that capitalize property, plant, or equipment obtained through capital leases. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84164758&loc=d3e45031-112735 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737 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 FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84164758&loc=d3e45014-112735 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 2) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 + Details
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- Definition 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. + References No definition available. + Details
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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount, before accumulated amortization, of debt issuance costs classified as noncurrent. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + 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 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399 + Details
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- Definition Amount of the hedged item as of the balance sheet date related to the derivative. For example, the hedged balance on a debt instrument. + References No definition available. + Details
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- Definition The amount, during the lease term, of each minimum [capital] lease payment allocated to interest expense so as to produce a constant periodic rate of interest on the remaining balance of the capital lease obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 35 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=77915053&loc=d3e43161-112731 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + 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 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 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 Reference 3: 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 + 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 + 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 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility. + References No definition available. + Details
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