Based on Bloomberg data, Doral Bank is the 3rd largest (by assets) bank in Puerto Rico...or rather was. After a 58% collapse in the share price today, news broke after the close:
*PUERTO RICO'S DORAL BANK PLACED UNDER FDIC RECEIVERSHIP, BANCO POPULAR AGREES TO BUY DORAL BANK OPERATIONS
It appears Non-Performing Loans were over 40%. Popular will take the deposits (and 8 of Doral's 26 branches) and the FDIC eats the bad debt (estimates to cost the Deposit Insurance Fund (DIF) will be $748.9 million).