Business Combinations (Summary of FDIC Indemnification Asset) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
FDIC Indemnification Asset [Roll Forward]
Balance at beginning of period	$ 11,846	$ 85,672
Additions from acquisitions	0	0
Additions from reimbursable expenses	3,805	6,490
Amortization	(3,282)	(5,763)
Changes in expected reimbursements from the FDIC for changes in expected credit losses	(16,610)	(54,554)
Payments received from the FDIC	(1,859)	(19,999)
Balance at end of period - Asset	0	$ 11,846
Balance at end of period - Liability	$ (6,100)