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Convertible Senior Debt (Details Textuals) (USD $)
In Thousands, except Share data, unless otherwise specified
 0 Months Ended 3 Months Ended
Mar. 04, 2015
Mar. 31, 2015
D
Debt Instrument [Line Items]    
Number of trading days to determine additional interest payable   20fce_Numberoftradingdaysmeasurementperiodtodetermineadditionalinterestpayable
Cash proceeds from termination and settlement of convertible note hedge $ 17,818fce_Cashproceedsfromterminationandsettlementofconvertiblenotehedge  
Convertible Senior Notes [Member] | Minimum [Member]    
Debt Instrument [Line Items]    
Conversion price per share   13.91us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Convertible Senior Notes [Member] | Maximum [Member]    
Debt Instrument [Line Items]    
Conversion price per share   24.21us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Common stock Class A    
Debt Instrument [Line Items]    
Shares received for termination and settlement of convertible note hedge 258,350fce_Sharesreceivedforterminationandsettlementofconvertiblenotehedge
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember