XML 98 R82.htm IDEA: XBRL DOCUMENT v3.3.1.900
Benefit Plans - Additional Information (Detail) - USD ($)
 12 Months Ended
Jan. 01, 2000
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]        
Number of highest-paid consecutive years for benefits     5 years  
Percentage of first employee compensation for which company makes matching contribution     1.00%  
Company contribution on employee specific contribution     $ 0.50  
Number of hours in service required for the contribution to be allocated     1000 hours  
Minimum eligibility for employees under 401(k) Plan, age     19 years  
Number of plan service years after which employer matching contribution vest     2 years  
Expense attributable to the Plan amounted     $ 451,000 $ 306,000
Percentage of vested participants 100.00%      
Participants years of credited service 2 years      
Compensation expense for ESOP     $ 0 $ 0
Shares of the Company held by the ESOP     208,168 173,823
Minimum [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Percentage of employee for which company makes specified contribution     2.00%  
Maximum [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Percentage of employee for which company makes specified contribution     6.00%  
Defined Benefit Pension Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Minimum eligibility for full-time employees, age     21 years  
Effective discount rate     0.25%  
Amount contributed to pension plan     $ 0 $ 0
Amount of accumulated benefit obligation for the defined benefit pension plan     $ 5,600,000 $ 5,300,000
Defined Benefit Pension Plan [Member] | Scenario, Forecast [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Amount contributed to pension plan, Expected in future   $ 0    
Defined Benefit Pension Plan [Member] | Minimum [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Period of service credit by employee     1 year  
Defined Benefit Pension Plan [Member] | Fixed Income Funds [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Targeted asset allocation on fixed income     40.00%  
Defined Benefit Pension Plan [Member] | Equity Funds [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Targeted asset allocation on fixed income       60.00%