Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
Fair Value Measurements - Schedule of Cash Deposits Subject to Credit Risk (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Fair Value Disclosures [Abstract]    
Cash deposits $ 47,150 $ 57,274
Restricted cash deposits (included in other assets) 70,000 61,000
Total cash deposits 117,000 118,000
Amount of cash deposits in excess of amounts federally insured $ 114,000 $ 116,000