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, 2016	Dec. 31, 2015	Dec. 31, 2014
Denominator:
Weighted average common shares outstanding – basic	[1]	189,868	166,389	163,625
Effect of dilutive securities:
Director and employee SARs and restricted stock Equity Awards		0	0	778
Weighted average common shares outstanding – diluted		189,868	166,389	164,403

[1] Includes common stock issued in connection with the exchange of 77.0 million shares for all outstanding Memorial common stock on September 16, 2016.