CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Statement of Financial Position [Abstract]
Mortgage loans held for sale, amortized cost	$ 48,370		$ 19,624
Securities available for sale, amortized cost	363,408	[1]	524,036	[1]
Securities held to maturity, fair value	$ 41,420		$ 52,499
Common stock, par value (in dollars per share)	$ 0.0625		$ 0.0625
Common stock, shares authorized (in shares)	30,000,000		30,000,000
Common stock, shares issued (in shares)	16,379,771		16,292,471
Common stock, shares outstanding (in shares)	16,379,771		16,292,471

[1] Net of other-than-temporary impairment losses.