

	GPT Contracts⁽¹⁾		Drilling Rig Contracts⁽²⁾		Operating Leases ⁽³⁾		Purchase Obligations⁽⁴⁾

	(In thousands)
2014	$	86,628	$	4,240	$	3,912	$	3,071
2015	85,043		—		3,994		220
2016	81,803		—		4,123		—
2017	78,326		—		4,070		—
2018	65,860		—		4,043		—
Thereafter	140,624		—		12,996		—
Total	$	538,284	$	4,240	$	33,138	$	3,291

⁽¹⁾

Under contracts with various third parties, we are obligated to provide minimum daily natural gas volume for gathering, processing, fractionation and transportation, as determined on a monthly basis, or pay for any deficiencies at a specified reservation fee rate. Our gathering and transportation contracts with CMLP have no minimum volume requirement and, therefore, are not reported in the above amounts.


⁽²⁾	We lease drilling rigs from third parties for use in our development and exploration programs. The outstanding drilling rig contract requires payment of a specified day rate of $20,000 for the entire lease term regardless of our utilization of the drilling rigs.


⁽³⁾	We lease office buildings and other property under operating leases. Rent expense for operating leases with terms exceeding one month was $3.6 million in 2013, $4.2 million in 2012 and $4.8 million in 2011. Minimum payments have not been reduced by minimum sublease rentals of $2.2 million due in the future under noncancelable subleases.


⁽⁴⁾	At December 31, 2013, we were under contract to purchase goods and services for use in field and gas plant operations.