Significant Accounting Policies - Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Jun. 30, 2012
Intangible Assets by Major Class [Line Items]
Intangible assets, cost	$ 16,040	$ 16,040
Finite-lived intangible assets, accumulated amortization	(5,019)	(4,789)
Intangible assets, net	11,021	11,251
Customer relationships [Member]
Intangible Assets by Major Class [Line Items]
Finite-lived intangible assets, cost	9,800	9,800
Finite-lived intangible assets, accumulated amortization	(4,818)	(4,601)
Finite-lived intangible assets, net	4,982	5,199
Non-compete agreement [Member]
Intangible Assets by Major Class [Line Items]
Finite-lived intangible assets, cost	340	340
Finite-lived intangible assets, accumulated amortization	(201)	(188)
Finite-lived intangible assets, net	139	152
Marks trade name [Member]
Intangible Assets by Major Class [Line Items]
Indefinite-lived intangible assets, excluding goodwill	$ 5,900	$ 5,900