Stockholders' (Deficit) Equity (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balances, beginning of period	$ (103,660)	$ 178,721
Net income	65,133	58,046
Other comprehensive income	26,302	48,793
Dividends paid	(34,567)	(36,010)
Issuance of common stock	(5,184)	(4,134)
Conversion to common stock	0	0
Stock-based compensation expense	5,638	6,303
Repurchase of common stock	0	(128,451)
Balances, end of period	(46,338)	123,268
Preferred stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balances, beginning of period	1	1
Conversion to common stock		0
Balances, end of period	1	1
Preference stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balances, beginning of period	483	505
Conversion to common stock	(5)	(13)
Balances, end of period	478	492
Common stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balances, beginning of period	323,338	323,338
Balances, end of period	323,338	323,338
Additional paid-in capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balances, beginning of period	148,125	161,280
Issuance of common stock	(27,098)	(21,555)
Conversion to common stock	(101)	(273)
Stock-based compensation expense	5,638	6,303
Balances, end of period	126,564	145,755
Retained earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balances, beginning of period	5,107,734	5,155,537
Net income	65,133	58,046
Dividends paid	(34,567)	(36,010)
Balances, end of period	5,138,300	5,177,573
Accumulated other comprehensive loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balances, beginning of period	(940,133)	(888,635)
Other comprehensive income	26,302	48,793
Balances, end of period	(913,831)	(839,842)
Treasury stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balances, beginning of period	(4,743,208)	(4,573,305)
Issuance of common stock	21,914	17,421
Conversion to common stock	106	286
Repurchase of common stock	0	(128,451)
Balances, end of period	$ (4,721,188)	$ (4,684,049)

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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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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The gross value of stock issued during the period upon the conversion of convertible securities.

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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.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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