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Basis of Presentation (Tables) | 9 Months Ended
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Sep. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Reconciliation of basic earnings per share ("EPS") to diluted EPS | The following is a reconciliation of basic earnings per common share to diluted earnings per share:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(in thousands, except per share amounts) | 2014 |  | 2013 |  | 2014 |  | 2013
Net income available to common stockholders | $ | 20,614 |  |  | $ | 20,006 |  |  | $ | 53,151 |  |  | $ | 43,303 |
Basic weighted-average shares outstanding | 49,010 |  |  | 48,377 |  |  | 48,972 |  |  | 48,482 |
Dilutive effect of potential common stock equivalents — stock options and restricted stock units | 217 |  |  | 174 |  |  | 200 |  |  | 121 |
Diluted weighted-average shares outstanding | 49,227 |  |  | 48,551 |  |  | 49,172 |  |  | 48,603 |
Earnings per common share: |  |  |  |  |  |  |  |  |  |  |
Basic | $ | 0.42 |  |  | $ | 0.41 |  |  | $ | 1.09 |  |  | $ | 0.89 |
Diluted | $ | 0.42 |  |  | $ | 0.41 |  |  | $ | 1.08 |  |  | $ | 0.89 |
Potentially dilutive securities excluded from earnings per diluted share because their effect is anti-dilutive | — |  |  | — |  |  | — |  |  | — |
Stock option and restricted stock unit activity of the entity | The following table represents the Company’s stock option and restricted stock unit activity for the three and nine months ended September 30, 2014 and 2013:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(in thousands) | 2014 |  | 2013 |  | 2014 |  | 2013
Stock-based compensation expense recognized in operating expenses | $ | 3,041 |  |  | $ | 2,959 |  |  | $ | 8,781 |  |  | $ | 8,644 |
Less: Tax benefit of stock-based compensation expense in provision for income taxes | 1,075 |  |  | 1,087 |  |  | 3,142 |  |  | 3,031 |
Stock-based compensation expense, net of tax | $ | 1,966 |  |  | $ | 1,872 |  |  | $ | 5,639 |  |  | $ | 5,613 |
Fair value of shares vested | $ | 3,098 |  |  | $ | 3,007 |  |  | $ | 8,789 |  |  | $ | 8,656 |
Proceeds to the Company from the exercise of stock-based compensation | $ | 1,551 |  |  | $ | 4,557 |  |  | $ | 4,178 |  |  | $ | 5,333 |
Tax effect from the exercise of stock-based compensation, including shortfall tax benefits | $ | (89 | ) |  | $ | (337 | ) |  | $ | (275 | ) |  | $ | (2,187 | )
| At September 30,
(in thousands) | 2014 |  | 2013
Stock-based compensation cost capitalized in inventory | $ | 525 |  |  | $ | 426 |
Summary of financial instruments | The balances of the Company’s primary financial instruments were as follows:
| At September 30, |  | At December 31
(in thousands) | 2014 |  | 2013 |  | 2013
Financial instruments | $ | 98,568 |  |  | $ | 87,381 |  |  | $ | 117,571 |
Schedule of effective tax rates and income tax expense | The following table presents the Company’s effective tax rates and income tax expense for the three and nine months ended September 30, 2014 and 2013:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(in thousands, except percentages) | 2014 |  | 2013 |  | 2014 |  | 2013
Effective tax rate | 36.0 | % |  | 35.2 | % |  | 36.7 | % |  | 37.8 | %
Provision for income taxes | $ | 11,577 |  |  | $ | 10,870 |  |  | $ | 30,849 |  |  | $ | 26,304 |

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring and/or nonrecurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + 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 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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