Annual report pursuant to Section 13 and 15(d)

Revenue from Contracts with Customers (Narrative) (Details)

v3.20.1
Revenue from Contracts with Customers (Narrative) (Details) - Accounting Standards Update 2014-09
$ in Thousands
Jan. 01, 2018
USD ($)
Disaggregation of Revenue [Line Items]  
Increase the opening balance of retained earnings $ 24,109
Additional retained earnings adjustment $ 665