Statements of Cash Flows (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014
Statements of Cash Flows [Abstract]
Income taxes paid		$ 10,286	$ 12,915
Interest expense paid on deposits and borrowings		10,185	11,780
Noncash transfers from loans to other real estate	[1]	$ 19,792	$ 24,780

[1] Includes transfers from covered loans to covered other real estate.