Fair Values of Financial Instruments (Reconciliation of Recurring Fair Value Measurements Recognized in Balance Sheet using Significant Unobservable (Level Three) Inputs) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Fair Values of Financial Instruments [Abstract]
Beginning balance	$ 2,522	$ 4,043	$ 2,522	$ 3,336
Total realized and unrealized gains (losses)
Included in net income		56		56
Included in other comprehensive income (loss)		205		920
Purchases, sales, issuances and settlements		(566)		(574)
Ending balance	2,522	3,738	2,522	3,738
Total gains or losses for the period included in net income attributable to the change in unrealized gains or losses related to assets still held at the reporting date	$ 0	$ 0	$ 0	$ 0