Investments - Narrative (Details) (USD $)	Dec. 31, 2014		Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Fair Value	$ 26,912,000		$ 9,055,000
Cost Basis	27,043,000	[1]	9,070,000	[1]
Accumulated unrealized gain (loss), net of tax			100,000
Loans and Leases Receivable, Gross, Consumer, Revolving, Other	15,000,000
Short-Term Bond Mutual Funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value	18,961,000		7,985,000
Cost Basis	19,092,000	[1]	8,000,000	[1]
Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value	1,101,000		1,070,000
Cost Basis	1,101,000	[1]	1,070,000	[1]
Other Investment [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value	6,850,000		0
Cost Basis	6,850,000	[1]	0	[1]
Mutual Funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value	1,000,000
Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Loans and Leases Receivable, Gross, Consumer, Revolving, Other	$ 6,000,000

[1] The cost basis represents the actual amount paid less any permanent impairment of that asset.