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Supplemental Guarantor Condensed Consolidated Financial Statements - Condensed Consolidating Statement of Cash Flows (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Cash flows from operations: |  |  |
Cash provided by (used in) continuing operations | $ 78,315 us-gaap_NetCashProvidedByUsedInOperatingActivities | $ (3,429)us-gaap_NetCashProvidedByUsedInOperatingActivities | $ (9,452)us-gaap_NetCashProvidedByUsedInOperatingActivities
Cash flows from investing activities |  |  |
Purchase of office facilities | (4,398)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (14,012)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (14,739)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Cash used in investing activities | (4,398)us-gaap_NetCashProvidedByUsedInInvestingActivities | (14,012)us-gaap_NetCashProvidedByUsedInInvestingActivities | (14,739)us-gaap_NetCashProvidedByUsedInInvestingActivities
Cash flows from financing activities |  |  |
Cash dividends paid on Class A non-voting and Class B voting common stock | (5,983)us-gaap_PaymentsOfDividendsCommonStock | (5,978)us-gaap_PaymentsOfDividendsCommonStock | (5,986)us-gaap_PaymentsOfDividendsCommonStock
Issuance of Class A non-voting common stock | 185 us-gaap_ProceedsFromIssuanceOfCommonStock | 150 us-gaap_ProceedsFromIssuanceOfCommonStock | 0 us-gaap_ProceedsFromIssuanceOfCommonStock
Repurchase of Class A non-voting common stock for cancellation | 0 us-gaap_PaymentsForRepurchaseOfCommonStock | (3,625)us-gaap_PaymentsForRepurchaseOfCommonStock | (1,866)us-gaap_PaymentsForRepurchaseOfCommonStock
Tax benefit (deficiency) from share-based awards | 1,194 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities | (78)us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities | (720)us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities
Redemption of senior secured notes | (45,000)us-gaap_EarlyRepaymentOfSeniorDebt | 0 us-gaap_EarlyRepaymentOfSeniorDebt | 0 us-gaap_EarlyRepaymentOfSeniorDebt
Acquisition of non-controlling interest | 0 us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries | 0 us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries | (3,000)us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries
Decrease in bank call loans, net | (58,800)us-gaap_ProceedsFromPaymentsForOtherFinancingActivities | (10,100)us-gaap_ProceedsFromPaymentsForOtherFinancingActivities | 100,800 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
Cash (used in) provided by financing activities | (108,404)us-gaap_NetCashProvidedByUsedInFinancingActivities | (19,631)us-gaap_NetCashProvidedByUsedInFinancingActivities | 89,228 us-gaap_NetCashProvidedByUsedInFinancingActivities
Net (decrease) increase in cash and cash equivalents | (34,487)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | (37,072)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | 65,037 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents, beginning of year | 98,294 us-gaap_CashAndCashEquivalentsAtCarryingValue | 135,366 us-gaap_CashAndCashEquivalentsAtCarryingValue | 70,329 us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents, end of year | 63,807 us-gaap_CashAndCashEquivalentsAtCarryingValue | 98,294 us-gaap_CashAndCashEquivalentsAtCarryingValue | 135,366 us-gaap_CashAndCashEquivalentsAtCarryingValue
Eliminations |  |  |
Cash flows from operations: |  |  |
Cash provided by (used in) continuing operations | 0 us-gaap_NetCashProvidedByUsedInOperatingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_NetCashProvidedByUsedInOperatingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_NetCashProvidedByUsedInOperatingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Cash flows from investing activities |  |  |
Purchase of office facilities | 0 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Cash used in investing activities | 0 us-gaap_NetCashProvidedByUsedInInvestingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_NetCashProvidedByUsedInInvestingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_NetCashProvidedByUsedInInvestingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Cash flows from financing activities |  |  |
Cash dividends paid on Class A non-voting and Class B voting common stock | 0 us-gaap_PaymentsOfDividendsCommonStock / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_PaymentsOfDividendsCommonStock / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_PaymentsOfDividendsCommonStock / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Issuance of Class A non-voting common stock | 0 us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |
Repurchase of Class A non-voting common stock for cancellation |  | 0 us-gaap_PaymentsForRepurchaseOfCommonStock / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_PaymentsForRepurchaseOfCommonStock / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Tax benefit (deficiency) from share-based awards | 0 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Redemption of senior secured notes | 0 us-gaap_EarlyRepaymentOfSeniorDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |
Acquisition of non-controlling interest |  |  | 0 us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Decrease in bank call loans, net | 0 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Cash (used in) provided by financing activities | 0 us-gaap_NetCashProvidedByUsedInFinancingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_NetCashProvidedByUsedInFinancingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_NetCashProvidedByUsedInFinancingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Net (decrease) increase in cash and cash equivalents | 0 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Cash and cash equivalents, beginning of year | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Cash and cash equivalents, end of year | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Guarantor Subsidiaries |  |  |
Cash flows from operations: |  |  |
Cash provided by (used in) continuing operations | (29,344)us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (9,757)us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 31,776 us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Cash flows from investing activities |  |  |
Purchase of office facilities | 0 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Cash used in investing activities | 0 us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Cash flows from financing activities |  |  |
Cash dividends paid on Class A non-voting and Class B voting common stock | 0 us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Issuance of Class A non-voting common stock | 0 us-gaap_ProceedsFromIssuanceOfCommonStock / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_ProceedsFromIssuanceOfCommonStock / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |
Repurchase of Class A non-voting common stock for cancellation |  | 0 us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Tax benefit (deficiency) from share-based awards | 0 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Redemption of senior secured notes | 0 us-gaap_EarlyRepaymentOfSeniorDebt / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Acquisition of non-controlling interest |  |  | (3,000)us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Decrease in bank call loans, net | 0 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Cash (used in) provided by financing activities | 0 us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (3,000)us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Net (decrease) increase in cash and cash equivalents | (29,344)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (9,757)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 28,776 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Cash and cash equivalents, beginning of year | 30,901 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 40,658 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 11,882 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Cash and cash equivalents, end of year | 1,557 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 30,901 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 40,658 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Non-Guarantor Subsidiaries |  |  |
Cash flows from operations: |  |  |
Cash provided by (used in) continuing operations | 58,064 us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (3,616)us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (47,280)us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Cash flows from investing activities |  |  |
Purchase of office facilities | (4,398)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (14,012)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (14,739)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Cash used in investing activities | (4,398)us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (14,012)us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (14,739)us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Cash flows from financing activities |  |  |
Cash dividends paid on Class A non-voting and Class B voting common stock | 0 us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Issuance of Class A non-voting common stock | 0 us-gaap_ProceedsFromIssuanceOfCommonStock / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 us-gaap_ProceedsFromIssuanceOfCommonStock / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |
Repurchase of Class A non-voting common stock for cancellation |  | 0 us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Tax benefit (deficiency) from share-based awards | 0 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Redemption of senior secured notes | 0 us-gaap_EarlyRepaymentOfSeniorDebt / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Acquisition of non-controlling interest |  |  | 0 us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Decrease in bank call loans, net | (58,800)us-gaap_ProceedsFromPaymentsForOtherFinancingActivities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (10,100)us-gaap_ProceedsFromPaymentsForOtherFinancingActivities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 100,800 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Cash (used in) provided by financing activities | (58,800)us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (10,100)us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 100,800 us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Net (decrease) increase in cash and cash equivalents | (5,134)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (27,728)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 38,781 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Cash and cash equivalents, beginning of year | 66,945 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 94,673 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 55,892 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Cash and cash equivalents, end of year | 61,811 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 66,945 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 94,673 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Parent |  |  |
Cash flows from operations: |  |  |
Cash provided by (used in) continuing operations | 49,595 us-gaap_NetCashProvidedByUsedInOperatingActivities / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 9,944 us-gaap_NetCashProvidedByUsedInOperatingActivities / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 6,052 us-gaap_NetCashProvidedByUsedInOperatingActivities / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember
Cash flows from investing activities |  |  |
Purchase of office facilities | 0 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember
Cash used in investing activities | 0 us-gaap_NetCashProvidedByUsedInInvestingActivities / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0 us-gaap_NetCashProvidedByUsedInInvestingActivities / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0 us-gaap_NetCashProvidedByUsedInInvestingActivities / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember
Cash flows from financing activities |  |  |
Cash dividends paid on Class A non-voting and Class B voting common stock | (5,983)us-gaap_PaymentsOfDividendsCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | (5,978)us-gaap_PaymentsOfDividendsCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | (5,986)us-gaap_PaymentsOfDividendsCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember
Issuance of Class A non-voting common stock | 185 us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 150 us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |
Repurchase of Class A non-voting common stock for cancellation |  | (3,625)us-gaap_PaymentsForRepurchaseOfCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | (1,866)us-gaap_PaymentsForRepurchaseOfCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember
Tax benefit (deficiency) from share-based awards | 1,194 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | (78)us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | (720)us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember
Redemption of senior secured notes | (45,000)us-gaap_EarlyRepaymentOfSeniorDebt / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |
Acquisition of non-controlling interest |  |  | 0 us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember
Decrease in bank call loans, net |  | 0 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember
Cash (used in) provided by financing activities | (49,604)us-gaap_NetCashProvidedByUsedInFinancingActivities / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | (9,531)us-gaap_NetCashProvidedByUsedInFinancingActivities / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | (8,572)us-gaap_NetCashProvidedByUsedInFinancingActivities / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember
Net (decrease) increase in cash and cash equivalents | (9)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 413 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | (2,520)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember
Cash and cash equivalents, beginning of year | 448 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 35 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 2,555 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember
Cash and cash equivalents, end of year | $ 439 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | $ 448 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | $ 35 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember

X
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3044-108585 + Details
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- Definition Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 230 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450594&loc=d3e33268-110906 + Details
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- Definition The cash outflow for the extinguishment of long-term borrowing, with the highest claim on the assets of the entity in case of bankruptcy or liquidation, before its maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 20 -Section 55 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=32706628&loc=d3e11374-113907 + Details
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- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3574-108585 + Details
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- Definition Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3574-108585 + Details
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- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the purchase of noncontrolling interest during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3095-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585 + Details
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