Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2014

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	AFS Investments			Interest Rate Swaps			Total
Fair value at December 31, 2012	$	59,145		$	(7,968	)	$	51,177
Investment accretion included in interest income	2,556			—			2,556
Unrealized losses included in interest expense	—			(36		)	(36		)
Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	—			1,258			1,258
Unrealized (losses) gains included in equity and partners’ capital	(4,440		)	1,423			(3,017		)
Fair value at September 30, 2013	$	57,261		$	(5,323	)	$	51,938
Fair value at December 31, 2013	$	58,408		$	(4,604	)	$	53,804
Investment accretion included in interest income	2,833			—			2,833
Unrealized losses included in interest expense	—			(36		)	(36		)
Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	—			1,265			1,265
Unrealized losses included in equity and partners’ capital	(618		)	(1,488		)	(2,106		)
Fair value at September 30, 2014	$	60,623		$	(4,863	)	$	55,760