XML 81 R66.htm IDEA: XBRL DOCUMENT v3.8.0.1
Fair Value Measurements (Financial Assets And Liabilities Measured At Fair Value) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Deferred compensation plan investments $ 120,300 [1] $ 80,600  
Participant Withdrawals From Deferred Compensation Plan Investments 4,200 8,300  
Diversification of share awards within deferred compensation plan (Equity) 23,233 25,428 $ 3,557
Interest Rate Derivative Assets, at Fair Value 2,200 0  
Interest Rate Derivative Liabilities, at Fair Value 500 0  
Level 1 [Member]      
Deferred compensation plan investments 120,300 80,600  
Interest Rate Derivative Assets, at Fair Value 0 0  
Interest Rate Derivative Liabilities, at Fair Value 0 0  
Fair Value, Inputs, Level 2 [Member]      
Deferred compensation plan investments 0 0  
Level 3 [Member]      
Deferred compensation plan investments 0 0  
Interest Rate Derivative Assets, at Fair Value 0 0  
Interest Rate Derivative Liabilities, at Fair Value 0 0  
Interest Rate Swap [Member]      
Interest Rate Derivative Assets, at Fair Value 2,200    
Interest Rate Derivative Liabilities, at Fair Value 500    
Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]      
Interest Rate Derivative Assets, at Fair Value 2,200 0  
Interest Rate Derivative Liabilities, at Fair Value $ 500 $ 0  
[1] Approximately $4.2 million and $8.3 million of participant cash was withdrawn from our deferred compensation plan investments during the years ended December 31, 2017 and 2016, respectively. Approximately $23.2 million and $25.4 million of shares within the deferred compensation plan were diversified into other deferred compensation plan investments during the years ended December 31, 2017 and 2016, respectively.