Recently Issued Accounting Standards (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Adoption of New Accounting Pronouncements [Abstract]
Right-of-use asset	$ 5,938
Lease liability	5,958
Revenues within scope of updated accounting guidance	55,018	$ 40,540
ASU 2014-09 [Member]
Adoption of New Accounting Pronouncements [Abstract]
Revenues within scope of updated accounting guidance	$ 28	$ 28
Revenues within scope of updated accounting guidance, as a percentage of total revenues (less than)	0.10%	0.10%
ASU 2016-02 [Member] | Other Assets [Member]
Adoption of New Accounting Pronouncements [Abstract]
Right-of-use asset			$ 6,088
ASU 2016-02 [Member] | Other Liabilities [Member]
Adoption of New Accounting Pronouncements [Abstract]
Lease liability			$ 6,088