Long Term Investments (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended		9 Months Ended	12 Months Ended
	Dec. 31, 2014 partnerships	Dec. 31, 2013	Sep. 30, 2014	Dec. 31, 2012
Schedule of Equity Method Investments [Line Items]
Percentage of invested funds invested in partnerships not accounted for on equity method (greater than 5%)	5.00%	5.00%
Partnerships accounted for on equity method	1
Contributions	$ 12,000	$ 5,000
Investment Partnership One [Member]
Schedule of Equity Method Investments [Line Items]
Contributions			2,000
Investment Partnership Two [Member]
Schedule of Equity Method Investments [Line Items]
Contributions			5,000
Existing Investment Partnership [Member]
Schedule of Equity Method Investments [Line Items]
Contributions	5,000
Limited Partnership [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from limited partnership investments	$ 549	$ 769		$ 207