Employee Benefit Plans - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Foreign Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Age of employee covered under plan			60 years
Completed at least credited service period			5 years
Benefits payable calculation under plan description			One-half month's salary for each year of credited service
Benefits payable under the plan equate			15 days
Net periodic benefit cost	$ 67,000	$ 34,000	$ 131,000	$ 70,000
Defined benefit plan, benefit obligation	1,600,000		1,600,000		1,400,000
Contributions towards foreign pension plan			0
Defined benefit plan employees minimum requisition period under specific conditions			5 years
Supplemental Executive Retirement Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic benefit cost	364,000	691,000	729,000	1,382,000
Defined benefit plan, benefit obligation	8,600,000		8,600,000		7,900,000
Normal retirement age under the SERP			65 years
Certain conditions allow for early retirement			55 years
Vesting percentage under plan upon attainment of age 55 and 10 years of service			100.00%
Supplemental retirement plan, Term			Vesting under the plan is defined as 100% upon a participant's attainment of age 55 and 10 years of service and 0% prior to a participant's attainment of age 55 and 10 years of service.
Vesting percentage under plan prior to attainment of age 55 and 10 years of service			0.00%
Defined benefit plan employees minimum requisition period			10 years
Share based payment benefits payable targeted percentage			45.00%
Period in which the executive officer earned the highest salary and bonus			3 years
Period of employment of officer			10 years
Eligible age under condition one for reduced benefits under the plan			62 years
Employee service period under condition one			10 years
Normal retirement age			55 years
Service period reduction up to the retirement age			25 years
Lump sum payment period			10 years
Contributions made to the SERP			0
Supplemental Executive Retirement Health Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic benefit cost	84,000	232,000	46,000	463,000
Defined benefit plan accumulated benefit obligation non-current	2,100,000		2,100,000		2,600,000
Present value of the accumulated benefit obligation	$ 0		$ 0		$ 47,000