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      <LongName>100970 - Disclosure - Employee Benefit Plans - Additional Information (Detail)</LongName>
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      <LongName>101000 - Disclosure - Income Taxes - Schedule of Reconciliation of Differences between Federal Income Tax at Statutory Rates and Actual Income Tax Expense on Income from Continuing Operations (Detail)</LongName>
      <ReportType>Sheet</ReportType>
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      <LongName>101010 - Disclosure - Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Detail)</LongName>
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      <LongName>101020 - Disclosure - Income Taxes - Additional Information (Detail)</LongName>
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      <LongName>101030 - Disclosure - Assets and Liabilities Held for Sale and Discontinued Operations - Schedule of Operating Results, Assets and Liabilities Related to Discontinued Operations (Detail)</LongName>
      <ReportType>Sheet</ReportType>
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      <LongName>101040 - Disclosure - Related Party Transactions - Additional Information (Detail)</LongName>
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      <LongName>101070 - Disclosure - Condensed Financial Information of Parent Company - Condensed Balance Sheets (Detail)</LongName>
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    <Log type="Info">Columns in Cash Flows statement 'CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)' have maximum duration 365 days and at least 71 values. Shorter duration columns must have at least one fourth (17) as many values. Column '4/1/2013 - 6/30/2013' is shorter (90 days) and has only 2 values, so it is being removed.</Log>
    <Log type="Info">Columns in Cash Flows statement 'CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)' have maximum duration 365 days and at least 71 values. Shorter duration columns must have at least one fourth (17) as many values. Column '7/1/2013 - 9/30/2013' is shorter (91 days) and has only 2 values, so it is being removed.</Log>
    <Log type="Info">Columns in Cash Flows statement 'CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)' have maximum duration 365 days and at least 71 values. Shorter duration columns must have at least one fourth (17) as many values. Column '10/1/2013 - 12/31/2013' is shorter (91 days) and has only 4 values, so it is being removed.</Log>
    <Log type="Info">Columns in Cash Flows statement 'CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)' have maximum duration 365 days and at least 71 values. Shorter duration columns must have at least one fourth (17) as many values. Column '1/1/2014 - 3/31/2014' is shorter (89 days) and has only 4 values, so it is being removed.</Log>
    <Log type="Info">Columns in Cash Flows statement 'CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)' have maximum duration 365 days and at least 71 values. Shorter duration columns must have at least one fourth (17) as many values. Column '4/1/2014 - 6/30/2014' is shorter (90 days) and has only 2 values, so it is being removed.</Log>
    <Log type="Info">Columns in Cash Flows statement 'CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)' have maximum duration 365 days and at least 71 values. Shorter duration columns must have at least one fourth (17) as many values. Column '7/1/2014 - 9/30/2014' is shorter (91 days) and has only 2 values, so it is being removed.</Log>
    <Log type="Info">Columns in Cash Flows statement 'CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)' have maximum duration 365 days and at least 71 values. Shorter duration columns must have at least one fourth (17) as many values. Column '10/1/2014 - 12/31/2014' is shorter (91 days) and has only 4 values, so it is being removed.</Log>
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    <Log type="Info">Columns in Cash Flows statement 'Condensed Financial Information of Parent Company - Condensed Statements of Cash Flows (Detail) (USD $)' have maximum duration 365 days and at least 26 values. Shorter duration columns must have at least one fourth (6) as many values. Column '1/1/2013 - 3/31/2013' is shorter (89 days) and has only 3 values, so it is being removed.</Log>
    <Log type="Info">Columns in Cash Flows statement 'Condensed Financial Information of Parent Company - Condensed Statements of Cash Flows (Detail) (USD $)' have maximum duration 365 days and at least 26 values. Shorter duration columns must have at least one fourth (6) as many values. Column '4/1/2013 - 6/30/2013' is shorter (90 days) and has only 1 values, so it is being removed.</Log>
    <Log type="Info">Columns in Cash Flows statement 'Condensed Financial Information of Parent Company - Condensed Statements of Cash Flows (Detail) (USD $)' have maximum duration 365 days and at least 26 values. Shorter duration columns must have at least one fourth (6) as many values. Column '7/1/2013 - 9/30/2013' is shorter (91 days) and has only 1 values, so it is being removed.</Log>
    <Log type="Info">Columns in Cash Flows statement 'Condensed Financial Information of Parent Company - Condensed Statements of Cash Flows (Detail) (USD $)' have maximum duration 365 days and at least 26 values. Shorter duration columns must have at least one fourth (6) as many values. Column '10/1/2013 - 12/31/2013' is shorter (91 days) and has only 3 values, so it is being removed.</Log>
    <Log type="Info">Columns in Cash Flows statement 'Condensed Financial Information of Parent Company - Condensed Statements of Cash Flows (Detail) (USD $)' have maximum duration 365 days and at least 26 values. Shorter duration columns must have at least one fourth (6) as many values. Column '1/1/2014 - 3/31/2014' is shorter (89 days) and has only 3 values, so it is being removed.</Log>
    <Log type="Info">Columns in Cash Flows statement 'Condensed Financial Information of Parent Company - Condensed Statements of Cash Flows (Detail) (USD $)' have maximum duration 365 days and at least 26 values. Shorter duration columns must have at least one fourth (6) as many values. Column '4/1/2014 - 6/30/2014' is shorter (90 days) and has only 1 values, so it is being removed.</Log>
    <Log type="Info">Columns in Cash Flows statement 'Condensed Financial Information of Parent Company - Condensed Statements of Cash Flows (Detail) (USD $)' have maximum duration 365 days and at least 26 values. Shorter duration columns must have at least one fourth (6) as many values. Column '7/1/2014 - 9/30/2014' is shorter (91 days) and has only 1 values, so it is being removed.</Log>
    <Log type="Info">Columns in Cash Flows statement 'Condensed Financial Information of Parent Company - Condensed Statements of Cash Flows (Detail) (USD $)' have maximum duration 365 days and at least 26 values. Shorter duration columns must have at least one fourth (6) as many values. Column '10/1/2014 - 12/31/2014' is shorter (91 days) and has only 3 values, so it is being removed.</Log>
    <Log type="Info">Process Flow-Through: 100010 - Statement - CONSOLIDATED BALANCE SHEETS</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Dec. 31, 2012'</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Dec. 31, 2011'</Log>
    <Log type="Info">Process Flow-Through: 100020 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Dec. 31, 2012'</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Dec. 31, 2011'</Log>
    <Log type="Info">Process Flow-Through: 100030 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Dec. 31, 2014'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Sep. 30, 2014'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Jun. 30, 2014'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Mar. 31, 2014'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Dec. 31, 2013'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Sep. 30, 2013'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Jun. 30, 2013'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Mar. 31, 2013'</Log>
    <Log type="Info">Process Flow-Through: 100040 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Dec. 31, 2014'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Sep. 30, 2014'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Jun. 30, 2014'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Mar. 31, 2014'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Dec. 31, 2013'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Sep. 30, 2013'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Jun. 30, 2013'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Mar. 31, 2013'</Log>
    <Log type="Info">Process Flow-Through: 100060 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</Log>
    <Log type="Info">Process Flow-Through: 100070 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical)</Log>
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