Annual report pursuant to Section 13 and 15(d)

Equity Investments - Balance Sheet Disclosure (Details)

v3.10.0.1
Equity Investments - Balance Sheet Disclosure (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Equity Method Investments and Joint Ventures [Abstract]    
Current assets $ 471,733 $ 415,032
Noncurrent assets 1,302,488 1,542,090
Current liabilities 239,975 261,086
Noncurrent liabilities $ 94,575 $ 148,839