PARENT ONLY CONDENSED FINANCIAL STATEMENTS (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Assets
Cash and cash equivalents	$ 61,320	$ 65,650	$ 109,148	$ 60,123
Securities available for sale	891,106	902,341
Total assets	2,859,864	2,769,288
Liabilities
Subordinated debentures	46,394	50,418
Other liabilities	20,864	34,494
Total liabilities	2,554,338	2,445,537
Shareholders' equity	305,526	323,751	336,553	302,570
Total liabilities and shareholders' equity	2,859,864	2,769,288
Parent Company
Assets
Cash and cash equivalents	11,667	7,102	8,022	14,284
Securities available for sale	399	399
Investment in subsidiaries	334,531	361,397
Other assets	10,827	11,523
Total assets	357,424	380,421
Liabilities
Subordinated debentures	46,394	50,418
Other liabilities	5,504	6,252
Total liabilities	51,898	56,670
Shareholders' equity	305,526	323,751
Total liabilities and shareholders' equity	$ 357,424	$ 380,421