Statement of Owner's Equity Statement of Owner's Equity (USD $) In Thousands	Total	Owner's capital	Retained earnings	Accumulated other comprehensive income (loss)
Balance at beginning of period at Dec. 31, 2010		$ 1,046,862	$ 242,396	$ 338
Capital contributions from parent	5,100	5,100
Net income	152,813		152,813
Cash distributions to parent	(127,000)		(127,000)
Reclassification of unrecognized gain into earnings	(62)			(62)
Balance at end of period at Dec. 31, 2011	1,320,447	1,051,962	268,209	276
Capital contributions from parent	8,630	8,630
Net income	136,723		136,723
Cash distributions to parent	(137,500)		(137,500)
Reclassification of unrecognized gain into earnings	(62)			(62)
Balance at end of period at Dec. 31, 2012	1,328,238	1,060,592	267,432	214
Capital contributions from parent	13,300	13,300
Net income	172,987		172,987
Cash distributions to parent	(91,000)		(91,000)
Reclassification of unrecognized gain into earnings	(62)			(62)
Balance at end of period at Dec. 31, 2013	$ 1,423,463	$ 1,073,892	$ 349,419	$ 152