Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Assets
Securities held to maturity, fair value	$ 1,203,068	$ 1,182,846
Loans held for sale (LHFS), fair value	$ 146,621	$ 91,182
Shareholders' Equity
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, authorized (in shares)	250,000,000	250,000,000
Common stock, issued (in shares)	67,557,395	67,481,992
Common stock, outstanding (in shares)	67,557,395	67,481,992