Quarterly report pursuant to Section 13 or 15(d)

ACQUISITIONS - Narrative (Details)

v3.10.0.1
ACQUISITIONS - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jul. 01, 2018
Apr. 01, 2018
Jan. 01, 2018
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Business Acquisition [Line Items]                
Cash paid in acquisition           $ 14,284 $ 0  
Merger-related costs       $ 1,429 $ 732 37,414 $ 3,476  
Goodwill       $ 727,699   $ 727,699   $ 298,528
Carrying value of assets managed $ 400,000              
Xenith                
Business Acquisition [Line Items]                
Number of shares equivalent to each share of acquired entity     0.9354          
Number of common shares issued     21,922,077          
Consideration transferred, fair value     $ 794,809          
Cash paid in acquisition     6,170          
Fair value of total consideration transferred     800,979          
Goodwill     424,645          
Acquired amortizable intangible assets     38,470          
DHFB                
Business Acquisition [Line Items]                
Cash paid in acquisition   $ 4,800            
Fair value of total consideration transferred   7,400            
Goodwill   3,600            
Acquired amortizable intangible assets   4,100            
Carrying value of assets managed   $ 600,000            
Outfitter Advisors Ltd.                
Business Acquisition [Line Items]                
Cash paid in acquisition 3,400              
Fair value of total consideration transferred 5,900              
Goodwill 1,800              
Acquired amortizable intangible assets 3,800              
Carrying value of assets managed $ 400,000              
Minimum | DHFB                
Business Acquisition [Line Items]                
Acquired amortizable assets, useful life   5 years            
Minimum | Outfitter Advisors Ltd.                
Business Acquisition [Line Items]                
Acquired amortizable assets, useful life 1 year              
Maximum | DHFB                
Business Acquisition [Line Items]                
Acquired amortizable assets, useful life   16 years            
Maximum | Outfitter Advisors Ltd.                
Business Acquisition [Line Items]                
Acquired amortizable assets, useful life 14 years              
Performing | Xenith                
Business Acquisition [Line Items]                
Acquired performing loans, fair value     2,400,000          
Contractually required principal and interest payments     2,700,000          
Contractual cash flows not expected to be collected     20,600          
Nonperforming | Xenith                
Business Acquisition [Line Items]                
Fair value of loans acquired with a deterioration of credit quality     79,264          
Contractually required principal and interest payments     $ 114,270