Other Expense

12 Months Ended

Dec. 31, 2013

Other Expense [Abstract]

Other Expense

NOTE N.    Other Expense

The following table provides the components of the Company's other expense during the years ended December 31, 2013, 2012 and 2011:

	Year Ended December 31,
	2013		2012		2011
	(in thousands)
Impairment of inventory and other property and equipment (a)	$	61,812	$	5,719	$	3,126
Transportation commitment charge (b)	39,121		38,830		23,841
Other	16,386		17,940		11,884
Above market and idle drilling and well service equipment charges (c)	9,771		33,124		20,163
Contingency and environmental accrual adjustments	9,277		478		4,057
Terminated drilling rig contract charges (d)	1,019		15,747		—
Premier Silica acquisition costs	—		2,337		—
Total other expense	$	137,386	$	114,175	$	63,071

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(a) Represents charges of $36.3 million to reduce excess materials and supplies inventories to their market value and a charge of $25.5 million to reduce the carrying value of Sendero to its estimated fair value. See Notes C and D for additional information on the fair value of Sendero and material and supplies inventory, respectively.

(b) Primarily represents firm transportation payments on excess pipeline capacity commitments.

(c) Primarily represents expenses attributable to the portion of Pioneer's contracted drilling rig rates that were above market rates and idle drilling rig and fracture stimulation fleet fees, neither of which were chargeable to joint operations.

(d) Primarily represents charges to terminate rig contracts that were not required to meet planned drilling activities.