Fair Value of Financial Instruments (Level 3 Securities) (Details) - Recurring [Member] - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
		Jun. 30, 2016	Jun. 30, 2016
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance		$ 15,977	$ 16,252
Net unrealized gains (losses)	[1]	49	222
Purchases			132
Disposals		(473)	(1,053)
Ending Balance		15,553	15,553
States, Municipalities and Political Subdivisions [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance		344	343
Net unrealized gains (losses)	[1]	(10)	(9)
Purchases			0
Disposals		(80)	(80)
Ending Balance		254	254
Corporate Bonds [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance		10,716	10,895
Net unrealized gains (losses)	[1]	25	162
Purchases			0
Disposals		(241)	(557)
Ending Balance		10,500	10,500
Asset-Backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance		925	1,036
Net unrealized gains (losses)	[1]	34	69
Purchases			0
Disposals		(152)	(298)
Ending Balance		807	807
Equities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance		3,992	3,978
Net unrealized gains (losses)	[1]	0	0
Purchases			132
Disposals		0	(118)
Ending Balance		$ 3,992	$ 3,992

[1] Unrealized gains (losses) are recorded as a component of comprehensive income.