Spin-Off Of Business (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jun. 30, 2014	[1],[2],[3]	Mar. 31, 2014	[1],[3],[4]	Dec. 31, 2013	[1],[3],[5],[6]	Sep. 30, 2013	[1],[3]	Jun. 30, 2014		Jun. 30, 2013
Discontinued Operations And Disposal Groups [Abstract]
Revenues									$ 75.7		$ 80.2
Earnings before income taxes									10.0		17.0
Income tax expense									7.7		8.6
Earnings from discontinued operations, net of income taxes	$ (1.3)		$ 1.1		$ 0.8		$ 1.7		$ 2.3	[1],[3]	$ 8.4

[1] The Company realized an increase in revenue and operating expenses beginning August 1, 2013 as a result of the acquisition of Corelink.

[2] The Company realized an increase in revenue and operating expenses beginning May 16, 2014 as a result of the acquisition of Geo.

[3] The Company spun-off its OVS operating unit on June 13, 2014.

[4] The Company realized an increase in revenue and operating expenses beginning March 4, 2014 as a result of the acquisition of CoreXchange.

[5] The Company realized an increase in revenue and operating expenses beginning October 1, 2013 as a result of the acquisition of Access.

[6] The Company realized an increase in revenue and operating expenses beginning October 2, 2013 as a result of the acquisition of Fiberlink.