Condensed Consolidated Statements of Stockholder's Equity (USD $) In Thousands, unless otherwise specified	Total	Common stock	Additional paid-in capital	Accumulated other comprehensive income (loss)	Retained earnings
Balances at Dec. 31, 2011	$ 1,914,073	$ 7,032	$ 768,247	$ 469,982	$ 668,812
Increase (Decrease) in Stockholder's Equity
Net income	49,923				49,923
Other comprehensive income (loss), net of income taxes	15,863			15,863
Dividends	(51,600)				(51,600)
Capital contribution - stock-based compensation	521		521
Balances at Mar. 31, 2012	1,928,780	7,032	768,768	485,845	667,135
Balances at Dec. 31, 2012	2,136,297	7,032	771,041	635,699	722,525
Increase (Decrease) in Stockholder's Equity
Net income	66,835				66,835
Other comprehensive income (loss), net of income taxes	(17,195)			(17,195)
Dividends	(44,435)				(44,435)
Capital contribution - stock-based compensation	608		608
Income tax benefit on stock options exercised	32		32
Balances at Mar. 31, 2013	$ 2,142,142	$ 7,032	$ 771,681	$ 618,504	$ 744,925

This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation".

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-Name Statement of Financial Accounting Standard (FAS)

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

Tax benefit associated with any equity-based compensation plan other than an employee stock ownership plan (ESOP). The tax benefit results from the deduction by the entity on its tax return for an award of stock that exceeds the cumulative compensation cost for common stock or preferred stock recognized for financial reporting. Includes any resulting tax benefit that exceeds the previously recognized deferred tax asset (excess tax benefits).

+ References+ Details

- Definition

Net of tax amount of other comprehensive income (loss) attributable to the parent entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

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+ Details

- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

+ References+ Details