Fair Value of Financial Instruments (Level 3 Securities) (Details) - Recurring [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 16,252
Net unrealized gains (losses)	173	[1]
Purchases	132
Disposals	(580)
Ending Balance	15,977
States, Municipalities and Political Subdivisions [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	343
Net unrealized gains (losses)	1	[1]
Purchases	0
Disposals	0
Ending Balance	344
Corporate Bonds [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	10,895
Net unrealized gains (losses)	137	[1]
Purchases	0
Disposals	(316)
Ending Balance	10,716
Asset-Backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	1,036
Net unrealized gains (losses)	35	[1]
Purchases	0
Disposals	(146)
Ending Balance	925
Equities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	3,978
Net unrealized gains (losses)	0	[1]
Purchases	132
Disposals	(118)
Ending Balance	$ 3,992

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