Quarterly report pursuant to Section 13 or 15(d)

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

v3.5.0.2
Fair Value Measurements - Schedule of Cash Deposits Subject to Credit Risk (Detail) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Jun. 30, 2015
Dec. 31, 2014
Fair Value Disclosures [Abstract]        
Cash deposits $ 19,279 $ 42,645 $ 21,670 $ 58,199
Restricted cash deposits (included in Other assets) 25,000 36,000    
Total cash deposits 44,000 79,000    
Amount of cash deposits in excess of amounts federally insured $ 40,000 $ 75,000