2.2.0.7 false Subsequent Events 0212 - Disclosure - Subsequent Events true false false false 1 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ 2 Subsequent Events [Abstract] 0 adtn_SubsequentEventsAbstract adtn false na duration Subsequent Events Abstract false false false false false true false false false false false false 1 false false false false 0 0 false false false xbrli:stringItemType string Subsequent Events Abstract false 3 SUBSEQUENT EVENTS 1 us-gaap_ScheduleOfSubsequentEventsTextBlock us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0   <div style="font-family: 'Times New Roman',Times,serif; margin-left: 0in; "> <div align="justify" style="font-size: 10pt; margin-top: 10pt"><b>12. SUBSEQUENT EVENTS</b> </div> <div align="justify" style="font-size: 10pt; margin-top: 10pt">On July 13, 2010, we announced that our Board of Directors declared a quarterly cash dividend of $0.09 per common share to be paid to stockholders of record at the close of business on July 29, 2010. The payment date will be August 12, 2010. The quarterly dividend payment will be approximately $5.6 million. In July 2003, our Board of Directors elected to begin declaring quarterly dividends on our common stock considering the favorable tax treatment of dividends and adequate levels of Company liquidity. </div> </div>  <!-- Begin Block Tagged Note false false false us-types:textBlockItemType textblock Describes disclosed significant events or transactions that occurred after the balance sheet date, but before the issuance of the financial statements. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, losses resulting from fire or flood, losses on receivables, significant realized and unrealized gains and losses that result from changes in quoted market prices of securities, declines in market prices of inventory, changes in authorized or issued debt (SEC), significant foreign exchange rate changes, substantial loans to insiders or affiliates, significant long-term investments, and substantial dividends not in the ordinary course of business. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 11 false 1 2 false UnKnown UnKnown UnKnown false true