Fair Value of Financial Instruments (Level 3 Securities) (Details) (Recurring [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 18,315
Net unrealized gains (losses)	190	[1]
Purchases	121
Disposals	(437)
Ending Balance	18,189
States, Municipalities and Political Subdivisions [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	519
Net unrealized gains (losses)	0	[1]
Purchases	0
Disposals	0
Ending Balance	519
Corporate Bonds [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	12,312
Net unrealized gains (losses)	182	[1]
Purchases	0
Disposals	(295)
Ending Balance	12,199
Asset-Backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	1,612
Net unrealized gains (losses)	8	[1]
Purchases	0
Disposals	(127)
Ending Balance	1,493
Equities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	3,872
Net unrealized gains (losses)	0	[1]
Purchases	121
Disposals	(15)
Ending Balance	$ 3,978

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