Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 76,595	$ 81,374
Cash held in trust or on behalf of others [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	67,163	67,541
Collateral on bank credit arrangements and other [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 9,432	$ 13,833