Fair Value Disclosures - Summary of Investments Measured at Fair Value on a Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Common stock - International
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 95
Return of capital	0
Included in earnings (investment income)	0
Included in other comprehensive income	5
Purchases	0
Sales	0
Transfers into Level 3	0
Transfers out of Level 3	(100)
Ending Balance	0
Corporate debt
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	0
Return of capital	0
Included in earnings (investment income)	0
Included in other comprehensive income	0
Purchases	250
Sales	0
Transfers into Level 3	0
Transfers out of Level 3	0
Ending Balance	250
Other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	163	168
Return of capital	(43)	0
Included in earnings (investment income)	0	0
Included in other comprehensive income	5	(5)
Purchases	160	0
Sales	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	(285)	0
Ending Balance	$ 0	$ 163