Net Income (Loss) per Share - Earnings Attributable to Common Shareholders and Weighted Average Common Shares Outstanding (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Continuing operations
Net income from continuing operations	$ 24,827	$ 3,920
Less: Net (income) loss attributable to noncontrolling interests	(40)	(80)
Earnings available for diluted earnings per share	24,787	3,840
Less: Undistributed net income from continuing operations allocated to participating securities	0	0
Earnings from continuing operations available to common shareholders for basic earnings per share	24,787	3,840
Discontinued operations
Income (loss) from discontinued operations, net of taxes	418	(8,216)
Less: Undistributed net income from discontinued operations allocated to participating securities	0	0
Earnings (loss) from discontinued operations available to common shareholders for basic earnings per share	$ 418	$ (8,216)
Denominator:
Weighted average common shares outstanding — basic	42,097	34,302
Weighted average common shares upon conversion of participating securities (TEU's)	0	7,857
Dilutive effect of stock options, restricted stock and equity-settled awards	309	161
Total weighted average shares outstanding — diluted	42,406	42,320
Anti-dilutive awards excluded from diluted weighted average shares (in shares)	1,808	2,450