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Debt (Additional Information) (Details) (USD $) | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |  |  |  |  |  |  |  | 1 Months Ended |  |  | 6 Months Ended |  |  | 0 Months Ended | 1 Months Ended | 6 Months Ended |  | 0 Months Ended |
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Nov. 30, 2010 | Jun. 30, 2014 | Jun. 30, 2013 | Mar. 31, 2011 | Jun. 30, 2014 | Jun. 30, 2013 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Mar. 31, 2012 | Dec. 31, 2011 | Jul. 13, 2011 | Dec. 31, 2010 | Nov. 23, 2010 | Jul. 31, 2011 Credit Agreement [Member] | Jul. 13, 2011 Credit Agreement [Member] | Jun. 30, 2014 Credit Agreement [Member] Maximum [Member] | Jun. 30, 2014 Interest Rate Swap [Member] | Jun. 30, 2014 Bank Term Loan [Member] | Jul. 31, 2013 Bank Term Loan [Member] Cash Flow Hedging [Member] | Jul. 31, 2012 Bank Term Loan [Member] Cash Flow Hedging [Member] | Jul. 13, 2011 Amended Credit Facility [Member] | Jul. 31, 2011 Amended Credit Facility [Member] | Jun. 30, 2014 Amended Credit Facility [Member] | Jun. 30, 2013 Amended Credit Facility [Member] | Jul. 13, 2011 Amended Credit Facility [Member] | Jul. 13, 2011 Amended Credit Facility [Member] Minimum [Member] | Jul. 13, 2011 Amended Credit Facility [Member] Maximum [Member] | Jul. 13, 2011 Amended Credit Facility [Member] Federal Funds Rate [Member] | Jul. 13, 2011 Amended Credit Facility [Member] One Month LIBOR [Member] | Jul. 13, 2011 Amended Credit Facility [Member] Bank Term Loan [Member] | Jul. 13, 2011 Eurocurrency loans [Member] Credit Agreement [Member]
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit agreement, maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 165,000,000.0 |  |  |  |  |  |  |  |  |  |  |  | $ 265,000,000 |  |  |  |  | $ 100,000,000.0 |
Credit agreement, agreement period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |
Credit agreement, maturity date | Nov. 23, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Jul. 13, 2016 |  |  |  |  |  |  |  |  |  |
Reduction in interest costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.25% |  |  |  |  |  |
Size of permitted acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  | 25,000,000.0 |  |  |  |  |  |  |  |  |  |  |  | 100,000,000.0 |  |  |  |  |  |
Permitted additional indebtedness |  |  |  |  |  |  |  |  |  |  |  |  |  | 20,000,000.0 |  |  |  |  |  |  |  |  |  |  |  | 120,000,000.0 |  |  |  |  |  |
Revolving credit outstanding borrowings |  | 0 |  |  | 0 |  |  | 0 |  |  |  | 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable rate lower range basis spread |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.75% |  |  |  |  |  |  |  |  |  |  |  |  | 0.50% |  |  |
Variable rate higher range basis spread |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.50% |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.00% |  |
Line of credit, interest rate description |  |  |  |  |  |  |  |  |  |  |  |  |  |  | The base reference rate is the greater of the prime rate; federal funds effective rate plus 50 basis points; and adjusted London interbank offered (“LIBO”) rate plus 100 basis points. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit, LIBOR rate, minimum spread |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.75%
Line of credit, LIBOR rate, maximum spread |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.50%
Unused commitment fee percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.20% | 0.35% |  |  |  |
Payments commencement date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Sep. 30, 2011 |  |  |  |  |  |  |  |  |
Leverage ratio |  | 0.75 |  |  | 0.75 |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Actual FCCR |  | 2.65 | 2.06 |  | 2.65 | 2.06 | 2.69 | 2.39 | 2.23 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capitalized debt issuance costs |  |  |  |  |  |  |  |  |  | 100,000 | 700,000 |  | 1,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization expense, debt issue costs |  | 100,000 | 100,000 |  | 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capitalized debt issuance costs, net |  | 1,000,000 |  |  | 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount drawn on the line of credit to fund the acquisition of Curamik |  |  |  | 145,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of debt principal |  |  |  |  | 7,651,000 | 5,530,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,500,000 | 5,000,000 |  |  |  |  |  |  |
Required payment on debt obligation within the next 12 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20,000,000 |  |  |  |  |  |  |  |
Term loan debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 70,000,000 |  |  |  |  | 70,000,000 |  |  |  |  |  |  |  |
LIBOR in Effect at Period End |  | 0.1875% |  |  | 0.1875% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate spread over variable rate (percent) |  |  |  |  | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Irrevocable standby letters of credit |  | 1,400,000 |  |  | 1,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of interest rate swap liability |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Option to buy out capital lease, year |  |  |  |  | 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital lease, expiration date |  |  |  |  | 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital lease obligation |  | 7,800,000 |  |  | 7,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization expense related to the capital lease |  | 100,000 | 100,000 |  | 200,000 | 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital lease accumulated depreciation |  | 1,400,000 |  |  | 1,400,000 |  |  | 1,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense on outstanding debt |  | 500,000 | 500,000 |  | 1,000,000 | 1,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unused commitment fee |  | 100,000 | 100,000 |  | 200,000 | 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swap derivative, percentage of debt hedged (percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 65.00% | 65.00% |  |  |  |  |  |  |  |  |  |  |
Interest expense on capital lease |  | $ 100,000 | $ 100,000 |  | $ 300,000 | $ 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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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 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 Leverage Ratio + References No definition available. + Details
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- Definition Line of Credit Facility, Interest Rate Basis Points + References No definition available. + Details
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- Definition Line Of Credit Facility Original Term + References No definition available. + Details
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- Definition Amount of noncash expense included in interest expense to issue debt and obtain financing associated with the related debt instruments. Alternate captions include noncash interest expense. + References Reference 1: 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=31042434&loc=d3e3602-108585 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=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 8 -Article 9 + 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 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: 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=6455314&loc=d3e45031-112735 + 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 SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: 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=6455398&loc=d3e45280-112737 + 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=6455314&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=6584154&loc=d3e38371-112697 + Details
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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Details
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- Definition Amount of the required periodic payments including both interest and principal payments. + 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) -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 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 Gross amount, as of the balance sheet date, of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings in periods after one year or beyond the normal operating cycle, if longer, over the life of the long-term debt instruments to which such costs pertain. + 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=6451184&loc=d3e28555-108399 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 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Net amount of long-term deferred finance costs capitalized at the end of the reporting period. + 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=6451184&loc=d3e28555-108399 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 210.5-02.17) -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 17 -Article 5 + Details
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- Definition Fair value before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=28370219&loc=SL20226000-175313 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=20225523&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
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- Definition Amount of the cost of borrowed funds accounted for as interest expense for debt. + References Reference 1: 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=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 5 + 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 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: 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=6916424&loc=d3e43161-112731 + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Definition Amount borrowed under the credit facility as of the balance sheet date. + References Reference 1: 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 fee for available but unused credit capacity under the credit 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 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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