Fair Value Measurements - (Inputs Used to Determine Fair Values of Oreo are Considered Level 3 Inputs in Fair Value Hierarchy) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Other Real Estate Owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets on a non-recurring basis	$ 14,297	$ 23,242
Losses From Fair Value Changes	(46)	104
Impaired loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets on a non-recurring basis	39,379	46,815
Losses From Fair Value Changes	$ (327)	$ 4,019