Nature of Business and Summary of Significant Accounting Policies - Intangible Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
Intangible Assets by Major Class [Line Items]
Intangible assets, cost	$ 16,040	$ 16,040
Finite-lived intangible assets, Accumulated amortization	(7,154)	(6,488)
Finite-lived intangible assets, net	8,886	9,552
Customer relationships [Member]
Intangible Assets by Major Class [Line Items]
Intangible assets, cost	9,800	9,800
Finite-lived intangible assets, Accumulated amortization	(6,820)	(6,203)
Finite-lived intangible assets, net	2,980	3,597
Non-compete agreement [Member]
Intangible Assets by Major Class [Line Items]
Intangible assets, cost	340	340
Finite-lived intangible assets, Accumulated amortization	(334)	(285)
Finite-lived intangible assets, net	6	55
Trade Name [Member]
Intangible Assets by Major Class [Line Items]
Intangible assets, cost	5,900	5,900
Finite-lived intangible assets, Accumulated amortization	0	0
Finite-lived intangible assets, net	$ 5,900	$ 5,900