Exit Cost Accruals (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]  
Restructuring and exit-related costs $ 1,453
Cash payments (755)
Adjustments (80)
Restructuring and exit costs accrued at December 31, 2013 618
Employee Severance
  
Restructuring Cost and Reserve [Line Items]  
Restructuring and exit-related costs 944 [1]
Cash payments (557) [1]
Adjustments (80) [1]
Restructuring and exit costs accrued at December 31, 2013 307 [1]
Lease Termination And Other Exit Cost
  
Restructuring Cost and Reserve [Line Items]  
Restructuring and exit-related costs 211 [2]
Cash payments (83) [2]
Restructuring and exit costs accrued at December 31, 2013 128 [2]
Other Restructuring
  
Restructuring Cost and Reserve [Line Items]  
Restructuring and exit-related costs 298 [3]
Cash payments (115) [3]
Restructuring and exit costs accrued at December 31, 2013 $ 183 [3]
[1] Employee termination costs consist primarily of severance and related costs.
[2] Lease exit costs consist primarily of costs that will continue to be incurred under non-cancellable operating leases for their remaining term without benefit to the Company.
[3] Other exit costs include costs related to the movement of vehicles and equipment in connection with the significant curtailment of activity in the Tuscaloosa Marine Shale area.