Investments and Fair Value Measurements - Schedule of Accumulated Other-than-Temporary Credit-Related Impairments Charged to Retained Earnings and Interest and Other Expense Net (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013
Other Than Temporary Impairment Losses Investments [Abstract]
Impairments Charged to Retained Earnings	$ 58
Impairments Recognized in Other Income (Expense), Net	824
Total	$ 882