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Investments (Tables)
 6 Months Ended
Jun. 30, 2019
Investments [Abstract]  
Schedule of investments
Six Months Ended June 30, 2019
 
WMES
 
CASC Willis
 
Total
 
 
(in thousands)
Investment in joint ventures as of December 31, 2018
 
$
34,183

 
$
13,758

 
$
47,941

Earnings from joint ventures
 
2,565

 
57

 
2,622

Investment
 
5,013

 
—

 
5,013

Distribution
 
(3,300
)
 
—

 
(3,300
)
Foreign currency translation adjustment
 
—

 
(34
)
 
(34
)
Investment in joint ventures as of June 30, 2019
 
$
38,461

 
$
13,781

 
$
52,242
Summarized financial information
Summarized financial information for 100% of WMES is presented in the following tables:
 
Three Months Ended June 30
 
Six Months Ended June 30,
 
2019
 
2018
 
2019
 
2018
 
(in thousands)
 
(in thousands)
Revenue
$
13,594

 
$
9,040

 
$
23,137

 
$
16,646

Expenses
9,516

 
7,551

 
17,721

 
14,354

WMES income before income taxes
$
4,078

 
$
1,489

 
$
5,416

 
$
2,292

 
June 30,
2019
 
December 31,
2018
 
(in thousands)
Total assets
$
315,173

 
$
274,744

Total liabilities
230,759

 
198,534

Total WMES net equity
$
84,414

 
$
76,210