XML 42 R30.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Financial Instruments - Summary of Investments (Detail) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Total investments (available for sale), Cost | $ 161,007 | $ 161,596
Total investments (available for sale), Gross Unrealized Gain | 17 | 7
Total investments (available for sale), Gross Unrealized (Loss) | (368) | (355)
Total investments (available for sale), Fair value | 160,656 | 161,248
Short-term, Municipal Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Total investments (available for sale), Cost |  | 830
Total investments (available for sale), Fair value |  | 830
Short-term, Non-governmental Debt Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Total investments (available for sale), Cost | 139,700 | 125,485
Total investments (available for sale), Gross Unrealized Gain | 17 | 7
Total investments (available for sale), Gross Unrealized (Loss) | (241) | (222)
Total investments (available for sale), Fair value | 139,476 | 125,270
Short-term, Treasury and Federal Agencies [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Total investments (available for sale), Cost | 16,987 | 30,211
Total investments (available for sale), Gross Unrealized (Loss) | (127) | (133)
Total investments (available for sale), Fair value | 16,860 | 30,078
Short-term Investments [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Total investments (available for sale), Cost | 156,687 | 156,526
Total investments (available for sale), Gross Unrealized Gain | 17 | 7
Total investments (available for sale), Gross Unrealized (Loss) | (368) | (355)
Total investments (available for sale), Fair value | 156,336 | 156,178
Restricted short-term, Non-governmental Debt Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Total investments (available for sale), Cost | 4,320 | 5,070
Total investments (available for sale), Fair value | $ 4,320 | $ 5,070

X
- Definition Available for sale debt securities accumulated gross unrealized gain before tax including restricted securities current. + References No definition available. + Details
Name: | ceco_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTaxIncludingRestrictedSecuritiesCurrent
Namespace Prefix: | ceco_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Available for sale debt securities accumulated gross unrealized loss before tax including restricted securities current. + References No definition available. + Details
Name: | ceco_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTaxIncludingRestrictedSecuritiesCurrent
Namespace Prefix: | ceco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Available for sale debt securities amortized cost basis including restricted securities current. + References No definition available. + Details
Name: | ceco_AvailableForSaleDebtSecuritiesAmortizedCostBasisIncludingRestrictedSecuritiesCurrent
Namespace Prefix: | ceco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Available for sale debt securities including restricted securities current. + References No definition available. + Details
Name: | ceco_AvailableForSaleDebtSecuritiesIncludingRestrictedSecuritiesCurrent
Namespace Prefix: | ceco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_InvestmentTypeAxis=ceco_ShortTermMunicipalBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=ceco_ShortTermNonGovernmentalDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=ceco_ShortTermTreasuryAndFederalAgenciesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_ShortTermInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=ceco_RestrictedShortTermNonGovernmentalDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |