Employee Benefit Plans (Employee Benefits Charged To Operating Expenses) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Total employee benefits	$ 61,469	$ 56,688	$ 58,224
Payroll Taxes [Member]
Total employee benefits	21,417	21,118	20,621
Medical Plans [Member]
Total employee benefits	22,855	18,490	19,861
401K Plan [Member]
Total employee benefits	12,057	12,465	12,613
Pension Plans [Member]
Total employee benefits	2,555	1,627	2,441
Other [Member]
Total employee benefits	$ 2,585	$ 2,988	$ 2,688