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Note 3 - Acquisitions (Details) - Acquisition Details (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2012
Business Acquisition [Line Items] |  |  |
Gain on revaluation of previously held equity investment | $ (820)fsrv_BusinessCombinationGainOnRevaluationOfPreviouslyHeldEquityInvestment |  |
Goodwill | 427,178 us-gaap_Goodwill | 503,554 us-gaap_Goodwill | 402,645 us-gaap_Goodwill
Acquistitions 2014 [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Current assets |  | 35,641 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets / us-gaap_BusinessAcquisitionAxis = fsrv_Acquistitions2014Member |
Long term assets |  | 8,157 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentAssets / us-gaap_BusinessAcquisitionAxis = fsrv_Acquistitions2014Member |
Current liabilities |  | (45,980)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = fsrv_Acquistitions2014Member |
Long-term liabilities |  | (9,950)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities / us-gaap_BusinessAcquisitionAxis = fsrv_Acquistitions2014Member |
Redeemable non-controlling interest |  | (19,376)fsrv_BusinessCombinationAcquisitionOfLessThan100PercentRedeemableNoncontrollingInterest / us-gaap_BusinessAcquisitionAxis = fsrv_Acquistitions2014Member |
Non-controlling interests |  | (255)us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue / us-gaap_BusinessAcquisitionAxis = fsrv_Acquistitions2014Member |
Business acquisition total |  | (31,763)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = fsrv_Acquistitions2014Member |
Note consideration |  | (3,611)us-gaap_BusinessCombinationConsiderationTransferredOther1 / us-gaap_BusinessAcquisitionAxis = fsrv_Acquistitions2014Member |
Cash consideration, net of cash acquired |  | (108,245)us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = fsrv_Acquistitions2014Member |
Acquisition date fair value of contingent consideration |  | (17,838)us-gaap_ContingentConsiderationClassifiedAsEquityFairValueDisclosure / us-gaap_BusinessAcquisitionAxis = fsrv_Acquistitions2014Member |
Total purchase consideration |  | (129,694)us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = fsrv_Acquistitions2014Member |
Acquired intangible assets |  | 53,746 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill / us-gaap_BusinessAcquisitionAxis = fsrv_Acquistitions2014Member |
Goodwill |  | 107,711 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = fsrv_Acquistitions2014Member |
Acquisitions 2013 [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Current assets | 25,723 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2013Member |  |
Long term assets | 2,733 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentAssets / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2013Member |  |
Current liabilities | (35,308)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2013Member |  |
Long-term liabilities | (18,155)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2013Member |  |
Redeemable non-controlling interest | (43,531)fsrv_BusinessCombinationAcquisitionOfLessThan100PercentRedeemableNoncontrollingInterest / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2013Member |  |
Non-controlling interests | (3,629)us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2013Member |  |
Business acquisition total | (72,167)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2013Member |  |
Note consideration | (776)us-gaap_BusinessCombinationConsiderationTransferredOther1 / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2013Member |  |
Cash consideration, net of cash acquired | (37,735)us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2013Member |  |
Acquisition date fair value of contingent consideration | (9,556)us-gaap_ContingentConsiderationClassifiedAsEquityFairValueDisclosure / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2013Member |  |
Total purchase consideration | (48,067)us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2013Member |  |
Gain on revaluation of previously held equity investment | (820)fsrv_BusinessCombinationGainOnRevaluationOfPreviouslyHeldEquityInvestment / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2013Member |  |
Acquired intangible assets | 52,244 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2013Member |  |
Goodwill | 68,810 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2013Member |  |
Acquisitions 2012 [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Current assets |  |  | 30,427 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2012Member
Long term assets |  |  | 3,164 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentAssets / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2012Member
Current liabilities |  |  | (21,169)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2012Member
Long-term liabilities |  |  | (1,080)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2012Member
Redeemable non-controlling interest |  |  | (753)fsrv_BusinessCombinationAcquisitionOfLessThan100PercentRedeemableNoncontrollingInterest / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2012Member
Non-controlling interests |  |  | (1,153)us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2012Member
Business acquisition total |  |  | 9,436 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2012Member
Note consideration |  |  | (655)us-gaap_BusinessCombinationConsiderationTransferredOther1 / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2012Member
Cash consideration, net of cash acquired |  |  | (19,153)us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2012Member
Acquisition date fair value of contingent consideration |  |  | (1,944)us-gaap_ContingentConsiderationClassifiedAsEquityFairValueDisclosure / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2012Member
Total purchase consideration |  |  | (21,752)us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2012Member
Acquired intangible assets |  |  | 7,420 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2012Member
Goodwill |  |  | $ 4,896 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = fsrv_Acquisitions2012Member

X
- Definition This element represents the fair value of the noncontrolling interest in the acquiree at the acquisition date. + References No definition available. + Details
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- Definition The business combination gain on revaluation of previously held equity investment. + References No definition available. + Details
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- Definition This element represents the fair value of the noncontrolling interest in the acquiree at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition Amount of tangible or intangible assets, including a business or subsidiary of the acquirer transferred by the entity to the former owners of the acquiree. Excludes cash. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition Amount of assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition Amount of liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=35744172&loc=d3e2207-128464 + Details
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- Definition Amount of assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition Amount of liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition Fair value of contingent consideration in a business combination that is classified in shareholders' equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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