XML 17 R78.htm IDEA: XBRL DOCUMENT v2.4.1.9
Convertible Subordinated Notes (Details) (USD $)
0 Months Ended 3 Months Ended
Mar. 19, 2014
component
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Mar. 19, 2014
Debt Instrument [Line Items]          
Debt Instrument, Maturity Date   Mar. 15, 2021      
Carrying Values of Liability and Equity Components, Convertible Subordinated Notes          
Amortization of debt issuance costs   $ 226,000us-gaap_AmortizationOfFinancingCosts $ 232,000us-gaap_AmortizationOfFinancingCosts    
Convertible Subordinated Notes [Member]          
Debt Instrument [Line Items]          
Stated interest rate percentage 2.75%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
      2.75%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
Convertible debt, conversion to number of shares (per $1,000) 44.3169csv_DebtInstrumentConvertibleShares
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
       
Convertible debt, conversion base amount (in dollars) 1,000csv_DebtInstrumentConvertibleConversionBaseAmount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
       
Convertible debt, conversion rate (in dollars per share) $ 22.56us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
      $ 22.56us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
Debt redemption price, percentage 100.00%us-gaap_DebtInstrumentRedemptionPricePercentage
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
       
Fair value inputs, bond discount rate 6.75%us-gaap_FairValueInputsDiscountRate
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
       
Debt transaction costs 4,700,000us-gaap_DebtIssuanceCosts
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
  4,400,000us-gaap_DebtIssuanceCosts
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
   
Convertible subordinated notes, term 7 years        
Number of recognition components, convertible subordinated notes 2csv_NumberofRecognitionComponentsConvertibleDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
       
Deferred tax liability 12,700,000us-gaap_DeferredTaxLiabilitiesOther
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
      12,700,000us-gaap_DeferredTaxLiabilitiesOther
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
Carrying Values of Liability and Equity Components, Convertible Subordinated Notes          
Convertible subordinated notes, principal amount 143,750,000us-gaap_ConvertibleSubordinatedDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
143,750,000us-gaap_ConvertibleSubordinatedDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
    143,750,000us-gaap_ConvertibleSubordinatedDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
Unamortized discount of liability component   (28,381,000)us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
  (29,208,000)us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
 
Carrying value of the liability component   115,369,000us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
  114,542,000us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
 
Equity component carrying value   17,973,000us-gaap_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
  17,973,000us-gaap_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
 
Convertible subordinated notes, fair value   172,300,000us-gaap_LongTermDebtFairValue
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
     
Contractual coupon interest expense   1,000,000us-gaap_InterestExpenseDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
100,000us-gaap_InterestExpenseDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
   
Amortization of debt issuance costs   117,000us-gaap_AmortizationOfFinancingCosts
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
44,000us-gaap_AmortizationOfFinancingCosts
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
   
Accretion of discount, convertible subordinated notes   800,000us-gaap_AccretionOfDiscount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
200,000us-gaap_AccretionOfDiscount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
   
Effective interest rate percentage   6.75%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
     
Payment of debt transaction costs $ 4,700,000us-gaap_PaymentsOfDebtIssuanceCosts
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember