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Stockholders' Equity (Details 2) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended | 12 Months Ended | 88 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Dec. 31, 2013 | Jun. 30, 2014 | Mar. 29, 2007
Reconciliation of the number of shares outstanding with the number of shares used in computing basic and diluted earnings per share |  |  |  |  |  |  |
Common shares outstanding, end of period | 37,748,000 | 37,257,000 | 37,748,000 | 37,257,000 |  |  |
Effect of using weighted average common shares outstanding | (42,000) | (67,000) | (104,000) | (129,000) |  |  |
Shares used in computing earnings per share - basic | 37,706,000 | 37,190,000 | 37,644,000 | 37,128,000 |  |  |
Effect of shares issuable under stock option plans based on the treasury stock method | 144,000 | 121,000 | 165,000 | 107,000 |  |  |
Effect of contingently issuable restricted shares | 30,000 | 54,000 | 105,000 | 114,000 |  |  |
Shares used in computing earnings per share - diluted | 37,880,000 | 37,365,000 | 37,914,000 | 37,349,000 |  |  |
Number of shares of unvested contingently issuable restricted stock outstanding |  | 100,000 |  | 100,000 |  |  |
Share Repurchase Program |  |  |  |  |  |  |
Number of shares of outstanding common stock authorized to be acquired under a stock repurchase program | 6,600,000 |  | 6,600,000 |  |  | 6,600,000 | 1,000,000
Minimum number of shares of common stock repurchased |  |  | 100,000 |  |  | 6,000,000 |
Share repurchased |  |  | $ 505 |  | $ 1,832 |  |
Average price (in dollars per share) |  |  | $ 16.29 |  |  | $ 11.03 |

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- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of contingently issuable shares. Contingently issuable shares are those shares that are issuable for little or no cash contingent on certain conditions being met. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 55 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e2626-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 48 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e2538-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Contingently Issuable Shares -URI http://asc.fasb.org/extlink&oid=6508586 + Details
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