Stockholders' Equity (Narrative) (Detail) - USD ($) $ in Millions	1 Months Ended	6 Months Ended
	Mar. 31, 2016	Jun. 30, 2016	Jun. 30, 2015
Equity [Abstract]
Restricted shares of common stock granted (in shares)	790,263
Restricted shares of common stock vesting period	3 years
Stock repurchase program, remaining authorized repurchase amount		$ 9.5
Common stock repurchased		0
Treasury shares acquired		220,391	203,594