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Note 3 - Acquisitions (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Note 3 - Acquisitions (Details) [Line Items] |  |  |
Number of Businesses Acquired | 11 | 5 | 6
| $ 820 |  |
Business Combination, Acquisition Related Costs | 3,336 | 5,032 | 861
Business Acquisition, Goodwill, Expected Tax Deductible Amount | 2,823 | 2,214 | 11,441
Business Combination, Contingent Consideration, Liability | 8,740 | 13,000 |
Previously Resolved Contingencies [Member] | Acquisitions After December 31, 2008 [Member] |  |  |
Note 3 - Acquisitions (Details) [Line Items] |  |  |
Contingent Consideration Paid | 658 | 2,451 |
CRE Segment [Member] |  |  |
Note 3 - Acquisitions (Details) [Line Items] |  |  |
Number of Businesses Acquired | 8 | 2 | 1
RRE Segment [Member] |  |  |
Note 3 - Acquisitions (Details) [Line Items] |  |  |
Number of Businesses Acquired | 3 | 2 | 5
Property Services [Member] |  |  |
Note 3 - Acquisitions (Details) [Line Items] |  |  |
Number of Businesses Acquired |  | 1 |
Acquisitions After December 31, 2008 [Member] |  |  |
Note 3 - Acquisitions (Details) [Line Items] |  |  |
Business Combination, Contingent Consideration, Liability | 8,740 |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low | 10,500 |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High | 12,600 |  |
Contingent Consideration Paid | 1,994 | 5,492 | 1,806
Contingent Consideration Payable, Resolved |  | 658 |
Previously Resolved Contigencies [Member] |  |  |
Note 3 - Acquisitions (Details) [Line Items] |  |  |
Contingent Consideration Payable, Resolved | 13,727 |  |
Previously Resolved Contingencies [Member] |  |  |
Note 3 - Acquisitions (Details) [Line Items] |  |  |
Compensation Element | $ 12,009 | $ 7,475 |

X
- Definition Business combination gain on revaluation of previously held equity investment. + References No definition available. + Details
Name: | fsrv_BusinessCombinationGainOnRevaluationOfPreviouslyHeldEquityInvestment
Namespace Prefix: | fsrv_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Compensation Element + References No definition available. + Details
Name: | fsrv_CompensationElement
Namespace Prefix: | fsrv_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contingent Consideration Paid + References No definition available. + Details
Name: | fsrv_ContingentConsiderationPaid
Namespace Prefix: | fsrv_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Contingent consideration payable, resolved in period. + References No definition available. + Details
Name: | fsrv_ContingentConsiderationPayableResolved
Namespace Prefix: | fsrv_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | fsrv_Note3AcquisitionsDetailsLineItems
Namespace Prefix: | fsrv_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes. + 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 (d) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 + Details
Name: | us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e1043-128460 + Details
Name: | us-gaap_BusinessCombinationAcquisitionRelatedCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid. + 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 (c)(3) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition For contingent consideration arrangements and indemnification assets recognized in connection with a business combination, this element represents an estimate of the low-end of the potential range (undiscounted) of the consideration which may be paid. + 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 (c)(3) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 + Details
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Data Type: | xbrli:monetaryItemType
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Period Type: | instant

X
- Definition Amount of liability recognized arising from contingent consideration in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph b -URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The number of businesses acquired by the entity during the period. + References No definition available. + Details
Name: | us-gaap_NumberOfBusinessesAcquired
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration