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Employee Benefit Plans (Detail) - Pension Plan Asset Allocation - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Asset Category:      
Fair Value of Plan Assets (in Dollars) $ 64,903 $ 72,193 $ 74,370
Defined contribution plan, employer matching contribution percent of employee's compensation 4.00% 4.00% 2.00%
Equity Securities      
Asset Category:      
Target Plan Asset Allocations, minimum 50.00%    
Target Plan Asset Allocations, maximum 60.00%    
Fair Value of Plan Assets (in Dollars) [1] $ 38,314    
Percentage of Plan Assets 59.00% 59.00%  
Fixed Income Securities      
Asset Category:      
Target Plan Asset Allocations, minimum 30.00%    
Target Plan Asset Allocations, maximum 48.00%    
Fair Value of Plan Assets (in Dollars) [1] $ 22,457    
Percentage of Plan Assets 35.00% 36.00%  
Cash Equivalents      
Asset Category:      
Target Plan Asset Allocations, minimum 2.00%    
Target Plan Asset Allocations, maximum 10.00%    
Fair Value of Plan Assets (in Dollars) [1] $ 4,132    
Percentage of Plan Assets 6.00% 5.00%  
Total      
Asset Category:      
Fair Value of Plan Assets (in Dollars) [1] $ 64,903    
Percentage of Plan Assets 100.00% 100.00%  
[1] Additional information regarding the fair value of Pension Plan assets as of December 31, 2015 can be found in Note 22, "Fair Value."