Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments (Details)

v3.8.0.1
Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Assets    
Asset measured at, fair value $ 2,396  
Recurring [Member]    
Assets    
Assets measured at fair value, Adjusted cost 4,258 $ 7,446
Assets measured at fair value, Unrealized gains 25 40
Assets measured at fair value, Unrealized losses (527) (661)
Asset measured at, fair value 3,756 6,825
Recurring [Member] | Level 1 [Member]    
Assets    
Assets measured at fair value, Adjusted cost 1,483 1,483
Assets measured at fair value, Unrealized gains 25 31
Assets measured at fair value, Unrealized losses (148) (159)
Asset measured at, fair value 1,360 1,355
Recurring [Member] | Level 1 [Member] | Equity securities [Member]    
Assets    
Assets measured at fair value, Adjusted cost 0 0
Assets measured at fair value, Unrealized gains 25 31
Assets measured at fair value, Unrealized losses 0 0
Asset measured at, fair value 25 31
Recurring [Member] | Level 1 [Member] | Mutual funds [Member]    
Assets    
Assets measured at fair value, Adjusted cost 1,483 1,483
Assets measured at fair value, Unrealized gains 0 0
Assets measured at fair value, Unrealized losses (148) (159)
Asset measured at, fair value 1,335 1,324
Recurring [Member] | Level 2 [Member]    
Assets    
Assets measured at fair value, Adjusted cost 2,775 5,963
Assets measured at fair value, Unrealized gains 0 9
Assets measured at fair value, Unrealized losses (379) (502)
Asset measured at, fair value 2,396 5,470
Recurring [Member] | Level 2 [Member] | Corporate fixed income [Member]    
Assets    
Assets measured at fair value, Adjusted cost 1,443 4,288
Assets measured at fair value, Unrealized gains 0 9
Assets measured at fair value, Unrealized losses (304) (408)
Asset measured at, fair value 1,139 3,889
Recurring [Member] | Level 2 [Member] | Municipal bonds [Member]    
Assets    
Assets measured at fair value, Adjusted cost 1,332 1,675
Assets measured at fair value, Unrealized gains 0 0
Assets measured at fair value, Unrealized losses (75) (94)
Asset measured at, fair value 1,257 1,581
Recurring [Member] | Level 3 [Member]    
Liabilities    
Liabilities Measured at Fair Value Adjusted Cost 0 0
Liabilities measured at fair value, Unrealized gains 0 0
Liabilities measured at fair value, Unrealized losses 0 0
Liabilities measured at fair value 50,246 35,077
Recurring [Member] | Level 3 [Member] | Contingent consideration [Member]    
Liabilities    
Liabilities Measured at Fair Value Adjusted Cost 0 0
Liabilities measured at fair value, Unrealized gains 0 0
Liabilities measured at fair value, Unrealized losses 0 0
Liabilities measured at fair value $ 50,246 $ 35,077