Deposits (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Maturities of certificates and other time deposits $100,000 or more
Three months or less	$ 80,497		$ 80,497		$ 83,584
Over three through six months	115,287		115,287		86,893
Over six through twelve months	149,850		149,850		95,389
Over one through two years	69,003		69,003		112,316
Over two through three years	90,157		90,157		43,191
Over three through four years	13,468		13,468		74,745
Over four through five years	5,648		5,648		9,158
Total	523,910		523,910		505,276
Time deposits disclosures
Interest expense on certificates of deposits and other time deposits of $100,000 or more	1,400	$ 1,300	4,100	$ 4,100
Brokered time deposits	$ 4,300		$ 4,300		$ 5,700