Stock-Based Compensation Plans - Summary of the Activity for the Company's Stock Option Awards (Detail) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, Options, Beginning Balance	1,085	1,120	1,237
Forfeited, Options	(115)	(35)	(117)
Options outstanding, Options, Ending Balance	970	1,085	1,120
Options exercisable/vested at December 31, 2016	970
Forfeited, Exercise Price		$ 3.04	$ 5.22
Options outstanding, Weighted Average Exercise Price, Beginning Balance	$ 1.83	1.87	2.19
Forfeited, Weighted Average Exercise Price	2.00	3.04	5.22
Options outstanding, Weighted Average Exercise Price, Ending Balance	1.81	1.83	1.87
Options exercisable/vested at December 31, 2016, Weighted Average Exercise Price	1.81
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Exercise Price, Beginning Balance	1.45	1.45	1.45
Forfeited, Exercise Price	1.45
Options Outstanding, Exercise Price, Ending Balance	1.45	1.45	1.45
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Exercise Price, Beginning Balance	3.04	3.04	8.13
Forfeited, Exercise Price	3.04
Options Outstanding, Exercise Price, Ending Balance	$ 3.04	$ 3.04	$ 3.04