Fair Value Measurements (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - Recurring - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Assets
Deferred compensation	$ 8,213	$ 7,774
Total assets	8,213	7,774
Liabilities
Contingent consideration	11,465	10,840
Deferred compensation	13,377	11,836
Total liabilities	24,842	22,676
Level 1
Assets
Deferred compensation	8,213	7,774
Total assets	8,213	7,774
Liabilities
Contingent consideration	0	0
Deferred compensation	13,377	11,836
Total liabilities	13,377	11,836
Level 2
Assets
Deferred compensation	0	0
Total assets	0	0
Liabilities
Contingent consideration	0	0
Deferred compensation	0	0
Total liabilities	0	0
Level 3
Assets
Deferred compensation	0	0
Total assets	0	0
Liabilities
Contingent consideration	11,465	10,840
Deferred compensation	0	0
Total liabilities	$ 11,465	$ 10,840