Contingencies - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014	Dec. 31, 2013
Commitments And Contingencies Disclosure [Abstract]
Judgments and settlement losses		$ (3.8)	$ (6.7)
Amount paid to settlement of claims	$ 1.3
Discontinued operations for compensatory damages and exemplary damages	$ 5.7