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 increase in additional paid in capital (APIC) resulting from a tax benefit associated with share-based compensation plan other than an employee stock ownership plan (ESOP). Includes, but is not limited to, excess tax benefit.

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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, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury.

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Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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Number of share options (or share units) exercised during the current period.

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Value of stock (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of stock value of such awards forfeited. Stock issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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Value of stock issued as a result of the exercise of stock options.

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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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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Total	Preferred Stock	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Common Stock Held in Treasury
Balance at beginning of period (value) at Dec. 31, 2011	$ 315,372	$ 0	$ 383	$ 147,649	$ 333,523	$ (13,463)	$ (152,720)
Balance at beginning of period (shares) at Dec. 31, 2011		0	38,291				8,200
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under share-based compensation (shares)			31
Shares issued under share-based compensation (value)	0		0
Exercise of stock options and warrants (shares)			474
Exercise of stock options and warrants (value)	4,296		5	4,291
Income tax benefit from exercise of stock options and warrants (value)	5,841			5,841
Share-based compensation expense (value)	1,300			1,300
Net income	80,359us-gaap_NetIncomeLoss				80,359
Currency translation adjustment, net of tax expense or benefit	6,523					6,523
Repurchases of treasury stock (shares)							1,500
Repurchases of treasury stock (value)	(61,275)						(61,275)
Balance at end of period (value) at Dec. 31, 2012	352,416	0	388	159,081	413,882	(6,940)	(213,995)
Balance at end of period (shares) at Dec. 31, 2012		0	38,796				9,700
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under share-based compensation (shares)			8
Shares issued under share-based compensation (value)	0		0
Exercise of stock options and warrants (shares)			573
Exercise of stock options and warrants (value)	9,242		6	9,236
Income tax benefit from exercise of stock options and warrants (value)	7,805			7,805
Share-based compensation expense (value)	553			553
Net income	83,846us-gaap_NetIncomeLoss				83,846
Currency translation adjustment, net of tax expense or benefit	(811)					(811)
Repurchases of treasury stock (shares)							729
Repurchases of treasury stock (value)	(38,692)						(38,692)
Balance at end of period (value) at Dec. 31, 2013	414,359	0	394	176,675	497,728	(7,751)	(252,687)
Balance at end of period (shares) at Dec. 31, 2013		0	39,377				10,429
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under share-based compensation (shares)			37
Shares issued under share-based compensation (value)	0		0
Exercise of stock options and warrants (shares)			294
Exercise of stock options and warrants (value)	5,270		3	5,267
Income tax benefit from exercise of stock options and warrants (value)	4,141			4,141
Share-based compensation expense (value)	1,979			1,979
Net income	85,166us-gaap_NetIncomeLoss				85,166
Currency translation adjustment, net of tax expense or benefit	(18,417)					(18,417)
Repurchases of treasury stock (shares)							771
Repurchases of treasury stock (value)	(43,947)						(43,947)
Balance at end of period (value) at Dec. 31, 2014	$ 448,551	$ 0	$ 397	$ 188,062	$ 582,894	$ (26,168)	$ (296,634)
Balance at end of period (shares) at Dec. 31, 2014		0	39,708				11,200