Leases (Narrative) (Details)	3 Months Ended
	Mar. 31, 2019 USD ($) $ / agreement	Dec. 31, 2018 USD ($)
Lessee Lease [Line Items]
Lease, practical expedients package	true
Operating lease expiration dates	expiration dates through 2029
Financing lease obligations | $	$ 48,000	$ 81,000
Financing leases payment term	monthly payments through August 2020
Option to purchase assets per lease agreement | $ / agreement	1
Minimum [Member]
Lessee Lease [Line Items]
Leases renewal option	1 year
Implicit interest rates	3.64%
Maximum [Member]
Lessee Lease [Line Items]
Leases renewal option	5 years
Implicit interest rates	7.72%