Deposits (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Maturities of certificates and other time deposits $100,000 or more
Three months or less	$ 166,389		$ 191,133
Over three through six months	169,851		163,633
Over six through twelve months	330,450		209,954
Over one through two years	209,182		243,614
Over two through three years	85,885		94,238
Over three through four years	74,818		45,055
Over four through five years	12,407		39,956
Total	1,048,982		987,583
Time deposits disclosures
Interest expense on certificates of deposits and other time deposits of $100,000 or more	2,800	$ 1,300
Brokered time deposits	$ 141,800		$ 93,600