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		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Continuing operations
Net income (loss) from continuing operations	$ 12,302	$ 2,674	$ 16,222	$ (2,843)
Less: Net income attributable to noncontrolling interests	(640)	(189)	(720)	(110)
Earnings (loss) available for diluted earnings per share	11,662	2,485	15,502	(2,953)
Less: Undistributed net income from continuing operations allocated to participating securities	2,173	0	2,889	0
Earnings (loss) from continuing operations available to common shareholders for basic earnings per share	9,489	2,485	12,613	(2,953)
Discontinued operations
Loss from discontinued operations, net of taxes	(2,048)	(36,992)	(10,264)	(39,712)
Less: Undistributed net income from discontinued operations allocated to participating securities	382	0	1,913	0
Earnings (loss) from discontinued operations available to common shareholders for basic earnings per share	$ (1,666)	$ (36,992)	$ (8,351)	$ (39,712)
Denominator:
Weighted average common shares outstanding — basic	34,302	34,278	34,302	34,223
Weighted average common shares upon conversion of participating securities	7,857	7,857	7,857	0
Dilutive effect of stock options, restricted stock and equity-settled awards	264	193	213	0
Total weighted average shares outstanding — diluted	42,423	42,328	42,372	34,223
Anti-dilutive awards excluded from diluted weighted average shares (in shares)	1,987	2,779	2,218	10,786