Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Schedule of Cash Deposits Subject to Credit Risk (Detail)

v3.8.0.1
Fair Value Measurements - Schedule of Cash Deposits Subject to Credit Risk (Detail) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Fair Value Disclosures [Abstract]    
Cash deposits $ 90,752 $ 29,428
Restricted cash deposits (included in other assets) 68,000 30,000
Total cash deposits 159,000 59,000
Amount of cash deposits in excess of amounts federally insured $ 157,000 $ 57,000