Revenue Recognition (Accounts Receivable) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($)
Allowance for Doubtful Accounts
Balance at beginning of year, as adjusted for the adoption of ASU 2016-13 (Topic 326)	$ 3,100
Accruals for credit loss charged to expense, net	629
Balance at end of period	4,428
Adjusted balance
Allowance for Doubtful Accounts
Balance at beginning of year, as adjusted for the adoption of ASU 2016-13 (Topic 326)	$ 3,799