Quarterly report pursuant to Section 13 or 15(d)

Other Comprehensive Loss - Summary of Reconciliation of Net Loss to Comprehensive Loss (Detail)

v3.7.0.1
Other Comprehensive Loss - Summary of Reconciliation of Net Loss to Comprehensive Loss (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Apr. 09, 2016
Jun. 30, 2017
Jun. 30, 2016
Apr. 09, 2016
Jun. 30, 2017
Jun. 30, 2016
Other Comprehensive Income Loss [Line Items]            
Net loss   $ (32,523) $ (16,277)   $ (173,872) $ (23,470)
Other comprehensive income items:            
Unrealized holding gain on securities available-for-sale   993     933  
Comprehensive loss   $ (31,530) $ (16,277)   $ (172,939) $ (23,470)
Predecessor [Member]            
Other Comprehensive Income Loss [Line Items]            
Net loss $ (157)     $ (638)    
Other comprehensive income items:            
Comprehensive loss $ (157)     $ (638)