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Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2014

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]



	June 30, 2014				December 31, 2013
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
4.875% Senior Notes due 2021	$	497,701	$	548,605	$	497,525	$	524,434
4.625% Senior Notes due 2021	$	299,624	$	324,387	$	299,598	$	310,141
3.800% Senior Notes due 2022	$	299,059	$	306,063	$	299,011	$	290,453
3.850% Senior Notes due 2023	$	299,978	$	306,593	$	299,976	$	289,362

- Definition

Tabular disclosure of liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset.

+ References+ Details