XML 69 R58.htm IDEA: XBRL DOCUMENT v3.7.0.1
Accounts Receivable (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Receivables [Abstract]    
Trade and other accounts receivable $ 152,410 $ 146,460
Bank promissory notes 17,009 15,759
Revenue in excess of progress billings 30,664 15,926
Allowance for doubtful accounts (7,018) (6,952)
Total accounts receivable 193,065 171,193
Contract receivable $ 21,581 $ 14,045
Interest rate 2.00%