XML 157 R146.htm IDEA: XBRL DOCUMENT v3.7.0.1
RELATED-PARTY TRANSACTIONS - Transactions with St. Cloud Affiliates (Details) - USD ($)
Nov. 24, 2014
Mar. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Feb. 14, 2012
Related Party Transaction [Line Items]          
Deposits   $ 8,597,693,000 $ 9,142,150,000    
Limited Liability Company          
Related Party Transaction [Line Items]          
Common stock, shares outstanding (in shares)         700,538
Percentage of total shares outstanding       1.40%  
Limited partnership, required ownership interest (less than) 9.90%        
Deposits   $ 0 $ 1,000    
Limited Liability Company | Minimum          
Related Party Transaction [Line Items]          
Limited partnership, expected investment $ 5,000,000        
Limited Liability Company | Maximum          
Related Party Transaction [Line Items]          
Limited partnership, expected investment $ 7,500,000