2.4.0.8123 - Disclosure - Summary of Stock Based Compensation Expense Related to Employee Stock Options (Detail)truefalseIn Thousands, unless otherwise specifiedfalse1false USDfalsefalse$P04_01_2013To06_30_2013http://www.sec.gov/CIK0000934473duration2013-04-01T00:00:002013-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$P04_01_2012To06_30_2012http://www.sec.gov/CIK0000934473duration2012-04-01T00:00:002012-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false USDfalsefalse$P01_01_2013To06_30_2013http://www.sec.gov/CIK0000934473duration2013-01-01T00:00:002013-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4false USDfalsefalse$P01_01_2012To06_30_2012http://www.sec.gov/CIK0000934473duration2012-01-01T00:00:002012-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 3us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]2false 4us-gaap_ShareBasedCompensationus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse305000305USD$falsetruefalse2truefalsefalse308000308USD$falsetruefalse3truefalsefalse626000626USD$falsetruefalse4truefalsefalse638000638USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe aggregate amount of noncash, equity-based employee remuneration. 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