Earnings (Loss) Per Share - Schedule of Weighted-Average Number of Shares Outstanding (Detail) - shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share [Abstract]
Basic weighted average common shares outstanding (in shares)	183,615,000	130,186,000	99,677,000
Dilution effect of stock awards at end of period (in shares)	0	0	688,000
Diluted weighted average common shares outstanding (in shares)	183,615,000	130,186,000	100,365,000
Anti-dilutive stock-based compensation awards (in shares)	5,075,301	2,842,144	979,795