Goodwill and Other Intangible Assets (Schedule Of Components Of Other Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 73,990	$ 73,530
Accumulated Amortization	(53,262)	(47,905)
Other intangible assets, net	20,728	25,625
Insurance license [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,400	1,400
Other intangible assets, net	1,400	1,400
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	52,890	52,430
Accumulated Amortization	(43,617)	(39,332)
Other intangible assets, net	$ 9,273	$ 13,098
Useful Lives (in years)	11 years	11 years
Trade names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 15,400	$ 15,400
Accumulated Amortization	(5,775)	(5,133)
Other intangible assets, net	$ 9,625	$ 10,267
Useful Lives (in years)	24 years	24 years
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 4,300	$ 4,300
Accumulated Amortization	(3,870)	(3,440)
Other intangible assets, net	$ 430	$ 860
Useful Lives (in years)	10 years	10 years