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Consolidated Statements of Stockholders' Equity (USD $) In Thousands | Total | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member]
--- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2011 | $ 52,879 | $ 934 | $ 28,150 | $ 23,795
Sale of common stock | 47,250 | 315 | 46,935 |
Underwriting discount and offering expense | (7,469) |  | (7,469) |
Reclassification of temporary equity | 12,000 |  | 12,000 |
Stock option expense | 542 |  | 542 |
Net income | 25,367 |  |  | 25,367
Ending Balance at Dec. 31, 2012 | 130,569 | 1,249 | 80,158 | 49,162
Proceeds from exercise of stock options | 944 | 9 | 935 |
Stock option expense | 358 |  | 358 |
Net income | 13,584 |  |  | 13,584
Ending Balance at Jun. 30, 2013 | $ 145,455 | $ 1,258 | $ 81,451 | $ 62,746

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- Definition Amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with issuing stock. Includes, but is not limited to, legal and accounting fees and direct costs associated with stock issues under a shelf registration. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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