Valuation And Qualifying Accounts And Reserves (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 6,755	$ 6,263	$ 3,733
Additions Charged to expense	5,161	4,695	5,681
Additions Charged to Other accounts			1,146
Deductions for purpose for which accounts were set up	(5,943)	(4,203)	(4,297)
Balance at end of period	5,973	6,755	6,263
Insurance Reserves [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	5,453	4,985	2,483
Additions Charged to expense	5,138	4,671	5,658
Additions Charged to Other accounts			1,141
Deductions for purpose for which accounts were set up	(5,943)	(4,203)	(4,297)
Balance at end of period	4,648	5,453	4,985
Other Reserves [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	1,302	1,278	1,250
Additions Charged to expense	23	24	23
Additions Charged to Other accounts			5
Balance at end of period	$ 1,325	$ 1,302	$ 1,278