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Note 13 - Redeemable Non-controlling Interests (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Note 13 - Redeemable Non-controlling Interests (Details) [Line Items]    
Redeemable Noncontrolling Interest, Equity, Carrying Amount $ 230,992us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount $ 222,073us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount
Subordinate Noncontrolling Interest Shares 4,300,000fsrv_SubordinateNonControllingInterestShares 5,100,000fsrv_SubordinateNonControllingInterestShares
Put and Call Options, If Settled Increase in Diluted Earnings Per Share $ 1.05fsrv_PutAndCallOptionsIfSettledIncreaseInDilutedEarningsPerShare $ 1.64fsrv_PutAndCallOptionsIfSettledIncreaseInDilutedEarningsPerShare
Redemption Amount [Member]    
Note 13 - Redeemable Non-controlling Interests (Details) [Line Items]    
Redeemable Noncontrolling Interest, Equity, Carrying Amount $ 229,259us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount
/ us-gaap_EquityInterestIssuedOrIssuableByTypeAxis
= fsrv_RedemptionAmountMember
$ 215,747us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount
/ us-gaap_EquityInterestIssuedOrIssuableByTypeAxis
= fsrv_RedemptionAmountMember