CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
ASSETS
Available-for-sale securities pledged as collateral	$ 767,437	$ 872,971
Held-to-maturity investment security, at fair value	144,593
Allowance for loan losses	260,520	264,959
Loans pledged as collateral	16,441,068	15,911,933
Premises and equipment, accumulated depreciation	$ 114,890	$ 100,060
STOCKHOLDERS’ EQUITY
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	164,604,072	164,246,517
Treasury stock, shares (in shares)	20,436,621	20,337,284