Stock Plans and Other Incentives - Total Compensation Cost (Detail) (USD $)	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
2015	$ 1,138,000
2016	697,000
2017	123,000
2018	31,000
2019	11,000
Total compensation cost	2,000,000
Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
2015	31,000
2016	31,000
2017	31,000
2018	31,000
2019	11,000
Total compensation cost	135,000
RSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
2015	1,107,000
2016	666,000
2017	92,000
2018	0
2019	0
Total compensation cost	$ 1,865,000