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Concentrations of Credit Risk (Tables)
 12 Months Ended
Dec. 31, 2018
Risks And Uncertainties [Abstract]  
Company's Demand Deposits and Temporary Cash Investments   At December 31, 2018 and 2017, the Company’s demand deposits and temporary cash investments consisted of the following (in thousands):

 

 

 

2018

 

 

2017

 

Deposits in FDIC and SIPC-insured institutions under insurance limits

 

$

191,457

 

 

$

13,860

 

Deposits in FDIC and SIPC-insured institutions over insurance limits

 

 

38,425

 

 

 

106,849

 

Deposits in foreign banks

 

 

22,698

 

 

 

21,479

 

 

 

 

252,580

 

 

 

142,188

 

Less outstanding checks and other reconciling items

 

 

(7,551

)

 

 

(99,360

)

Cash and cash equivalents

 

$

245,029

 

 

$

42,828