Long-Term Investments (Cost-Method Investments) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($) investment	Dec. 31, 2015 USD ($)
Schedule of Cost-method Investments [Line Items]
Cost-method investments, carrying value	$ 35,476		$ 41,231
Cost-method investments, fair value	39,811		44,769
Cash distributions from cost method investments	(1,000)	$ (543)
Purchase of long-term investments	50	$ 10,000
Number of investments in funds | investment		3
Reinsurance Company
Schedule of Cost-method Investments [Line Items]
Purchase of long-term investments		$ 10,000
Investment partnerships
Schedule of Cost-method Investments [Line Items]
Cost-method investments, carrying value	34,975		40,730
Cost-method investments, fair value	39,300		44,217
Real estate partnership
Schedule of Cost-method Investments [Line Items]
Cost-method investments, carrying value	501		501
Cost-method investments, fair value	$ 511		$ 552