Pension Plan and Life Insurance Contract - Summary of Benefits Expected to Be Paid in Each of Next Five Years (Detail) $ in Thousands	Dec. 31, 2019 USD ($)
Retirement Benefits [Abstract]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 1,318
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	1,305
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	1,288
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	1,269
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	1,245
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 5,713