Net (Loss) Income Per Common Share - Basic Weighted Average Common Shares Outstanding to Diluted Weighted Average Common Shares Outstanding (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Denominator:
Weighted average common shares outstanding – basic	166,389	163,625	160,438
Effect of dilutive securities:
Director and employee SARs and restricted stock Equity Awards	0	778	969
Weighted average common shares outstanding – diluted	166,389	164,403	161,407