Receivables (Narrative) (Details) - USD ($) $ in Thousands				12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Nov. 02, 2012	Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Land Note for sale of real estate of disposal group			$ 101,000
Prinicipal payment received	$ 33,667	$ 67,333		$ 33,667	$ 67,333
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest rate on Land Note			1.50%
Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest rate on Land Note			1.00%