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Credit Agreement (Details) (USD $) | 3 Months Ended
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Jun. 30, 2014
Line of Credit Facility [Line Items] |
Line of credit, maximum borrowing capacity | $ 75,000,000
Line of credit, unused capacity, commitment fee percentage | 0.25%
Potential Increase in Aggregate Commitments [Member] |
Line of Credit Facility [Line Items] |
Line of credit, maximum borrowing capacity | 25,000,000
Letter of Credit [Member] |
Line of Credit Facility [Line Items] |
Line of credit, maximum borrowing capacity | $ 10,000,000
Eurodollar Rate [Member] |
Line of Credit Facility [Line Items] |
Basis spread on variable rate | 1.75%
Federal Funds Rate [Member] |
Line of Credit Facility [Line Items] |
Basis spread on variable rate | 0.50%
LIBOR [Member] |
Line of Credit Facility [Line Items] |
Basis spread on variable rate | 1.75%

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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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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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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
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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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
Name: | us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix: | us-gaap_
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Balance Type: | na
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