Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2012

Fair Value Measurements [Abstract]

Schedule of summarized assets and liabilities measured at fair value on recurring basis

The following table summarizes the assets and liabilities measured at fair value on a recurring basis at December 31, 2012 and 201 (in thousands):

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value Measurements
December 31, 2012:
Assets:
Derivatives	$	—	$	—	$	—	$	—
Liabilities:
Derivatives	$	—	$	1,525	$	—	$	1,525
Contingent liabilities		—		—		28,067		28,067
	$	—	$	1,525	$	28,067	$	29,592

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value Measurements
December 31, 2011:
Assets:
Derivatives	$	—	$	—	$	—	$	—
Liabilities:
Derivatives	$	—	$	9,597	$	—	$	9,597
Contingent liability		—		—		22,600		22,600
	$	—	$	9,597	$	22,600	$	32,197