Leases - Future Operating Lease Obligations (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2019	Dec. 31, 2018
Leases [Abstract]
Lessee, Operating Lease, Lease Not Yet Commenced, Payments, Due		$ 9,100
2019 (excluding the nine months ended September 30, 2019)		281
2020		1,456
2021		1,343
2021		1,232
2023		1,083
2024 and thereafter		8,126
Total lease payments	[1]	13,521
Less: Interest		(3,043)
Present value of lease liabilities		$ 10,478	$ 0
Lessee, Operating Lease, Not Yet Commenced, Lease Term		20 years 4 months 24 days

[1] Excludes $9.1 million of lease payments for a lease executed but not yet commenced. Lease will commence in 2020 with a lease term of 20.4 years.