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".

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 35
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415241&loc=d3e4534-113899

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 20
-Section 55
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=6576910&loc=d3e11149-113907

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph 64
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A91
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 20
-Section 55
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=6576910&loc=d3e11178-113907

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph 39
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY AND COMPREHENSIVE INCOME (USD $) In Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Comprehensive Income
Balance at Dec. 31, 2009	$ 326,398	$ 362	$ 248,937	$ 79,772	$ (858)	$ (1,815)
Balance (in shares) at Dec. 31, 2009		36,238			(56)
Comprehensive income:
Net income	6,250			6,250			6,250
Foreign currency translation adjustment	(419)					(419)	(419)
Total comprehensive income	5,831			6,250		(419)	5,831
Tax benefit from share-based compensation	21		21
Common stock issued under share-based compensation plans	674	5	(189)		858
Common stock issued under share-based compensation plans (in shares)		494			56
Share repurchases (Note 9)	(1,655)				(1,655)
Share repurchases (Note 9) (in shares)					(125)
Dividends declared (Note 9)	(1,345)			(1,345)
Conversion of convertible notes	27,168	24	27,144
Conversion of convertible notes (in shares)		2,328
Share-based compensation	3,827		3,827
Balance at Jun. 30, 2010	360,919	391	279,740	84,677	(1,655)	(2,234)
Balance (in shares) at Jun. 30, 2010		39,060			(125)
Balance at Dec. 31, 2010	328,523	391	281,119	91,069	(42,085)	(1,971)
Balance (in shares) at Dec. 31, 2010		39,063			(3,295)
Comprehensive income:
Net income	5,855			5,855			5,855
Foreign currency translation adjustment	437					437	437
Total comprehensive income	6,292			5,855		437	6,292
Tax benefit from share-based compensation	320		320
Common stock issued under share-based compensation plans	2,279	4	(1,590)		3,865
Common stock issued under share-based compensation plans (in shares)		431			299
Common stock repurchased under share-based compensation plans	(900)				(900)
Common stock repurchased under share-based compensation plans (in shares)					(66)
Share repurchases (Note 9)	(9,958)				(9,958)
Share repurchases (Note 9) (in shares)					(745)
Dividends declared (Note 9)	(3,718)			(3,718)
Share-based compensation	3,517		3,517
Balance at Jun. 30, 2011	$ 326,355	$ 395	$ 283,366	$ 93,206	$ (49,078)	$ (1,534)
Balance (in shares) at Jun. 30, 2011		39,494			(3,807)