Fair Value (Details) - Carrying Value of Level 3 Securities Available-for-Sale - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Rollforward of the Carrying Value of CDOs [Roll Forward]
Beginning balance		$ 30,757	$ 33,928	$ 31,529	$ 33,774
Change in other comprehensive income	[1]	(244)	(1,798)	(1,030)	(1,498)
Paydowns		(82)	(126)	(68)	(272)
Ending balance		$ 30,431	$ 32,004	$ 30,431	$ 32,004

[1] Included in unrealized holding gains in the Consolidated Statements of Comprehensive Income.