Fair Value Measurements Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2015

Fair Value Disclosures [Abstract]

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

Assets and liabilities measured at fair value on a recurring basis are summarized below (in thousands):

			Estimated fair value measurements
	Carrying value		Quoted prices in active markets (Level 1)		Significant other observable inputs (Level 2)		Significant other unobservable inputs (Level 3)
September 30, 2015:
Assets - cash equivalents	$	269,317	$	269,317	$	—	$	—
Other assets	13,977		13,977		—		—
December 31, 2014:
Assets - cash equivalents	$	314,570	$	314,570	$	—	$	—
Other assets	16,304		16,304		—		—