Accounts Receivable (Schedule Of Accounts Receivable) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable gross	$ 39,712	$ 33,330
Less allowance for doubtful accounts	(813)	(467)
Accounts receivable, net	38,899	32,863
Trade Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable gross	18,793	18,398
Unpaid Amounts For Benefit Services [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable gross	$ 20,919	$ 14,932