XML 40 R29.htm IDEA: XBRL DOCUMENT v3.7.0.1
Carrying Amounts and Fair Values of Certain Assets (Detail) - USD ($)
$ in Thousands
Mar. 26, 2017
Jan. 01, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash equivalents, carrying amount $ 24,640 $ 7,017
Restricted cash equivalents, carrying amount 73,624 69,113
Investments in marketable securities, carrying amount 6,854 7,260
Fair Value, Inputs, Level 1 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash equivalents, fair value 24,640 7,017
Restricted cash equivalents, fair value 73,624 69,113
Investments in marketable securities, carrying amount 6,854 $ 7,260
Fair Value, Inputs, Level 2 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash equivalents, fair value 0  
Restricted cash equivalents, fair value 0  
Investments in marketable securities, carrying amount 0  
Fair Value, Inputs, Level 3 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash equivalents, fair value 0  
Restricted cash equivalents, fair value 0  
Investments in marketable securities, carrying amount $ 0