Income Taxes (Narrative) (Detail) - USD ($)	3 Months Ended	6 Months Ended
	Dec. 31, 2017	Dec. 31, 2017
Income Taxes [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%
Increase (Decrease) in Deferred Income Taxes		$ 286,000
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount		$ 208,000
Tax Year 2018 [Member]
Income Taxes [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		27.55%
Subsequent Tax Years [Member]
Income Taxes [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%