Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Measurements

Schedule of assets measured at fair value using the market value approach on a recurring basis

	Fair Value Measurements at Reporting Date Using
($ in 000’s) Description	Assets/(Liabilities) at Fair Value			Quoted Prices in  Active Markets for  Identical Liabilities (Level 1)			Significant Other  Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	March 31, 2013
Derivative assets	$	1,156		$	1,156
Derivative liabilities	$	(5,212	)	$	(5,212	)	$	—	$	—
	December 31, 2012
Derivative assets	$	287		$	287		$	—	$	—
Derivative liabilities	$	(7,222	)	$	(7,222	)	$	—	$	—