Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation of Interim Period Statements - Schedule of Reconciles of Cash, Cash Equivalents and Restricted Cash Balances (Detail)

v3.19.3
Basis of Presentation of Interim Period Statements - Schedule of Reconciles of Cash, Cash Equivalents and Restricted Cash Balances (Detail) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Sep. 30, 2018
Dec. 31, 2017
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents [Abstract]        
Cash and cash equivalents $ 35,452 $ 35,371 $ 34,975 $ 59,835
Restricted cash, included in restricted cash and investments 200,051 105,331 70,149 60,370
Total cash, cash equivalents and restricted cash shown in the statement of cash flows $ 235,503 $ 140,702 $ 105,124 $ 120,205