XML 91 R72.htm IDEA: XBRL DOCUMENT v3.3.1.900
Summary of Changes in the Fair Value of the Pension Plan Level 3 Assets (Detail) - SEI Core Property Collective Investment Trust Fund - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]    
Plan Assets at Beginning of Year [1] $ 8,172  
Actual Return on Investments:    
Plan Assets at End of Year [1] 9,351 $ 8,172
Fair Value, Inputs, Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Plan Assets at Beginning of Year 8,172 1,125
Actual Return on Investments:    
Related to Investments Held at Year-End 1,179 672
Related to Investments Sold During the Year 0 0
Total Return on Investments 1,179 672
Purchases, Sales and Settlements   6,375
Plan Assets at End of Year $ 9,351 $ 8,172
[1] The SEI Core Property Collective Investment Trust Fund, through the SEI Core Property Fund, seeks both current income and long-term capital appreciation through investing in underlying funds that acquire, manage, and dispose of commercial real estate properties.