Deposits (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Maturities of certificates and other time deposits $100,000 or more
Three months or less	$ 87,181		$ 87,181		$ 191,133
Over three through six months	287,265		287,265		163,633
Over six through twelve months	290,216		290,216		209,954
Over one through two years	199,594		199,594		243,614
Over two through three years	131,329		131,329		94,238
Over three through four years	61,543		61,543		45,055
Over four through five years	8,889		8,889		39,956
Total	1,066,017		1,066,017		987,583
Time deposits disclosures
Interest expense on certificates of deposits and other time deposits of $100,000 or more	3,100	$ 1,400	8,900	$ 4,100
Brokered time deposits	$ 105,200		$ 105,200		$ 93,600