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Income Taxes | 12 Months Ended
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Dec. 31, 2013
Income Taxes |
Income Taxes | 9. Income Taxes The income tax provision consisted of the following for the years ended December 31:
(in thousands) |  | 2013 |  | 2012 |  | 2011 |
--- | --- | --- | --- | --- | --- | --- | ---
Current |  |  |  |  |  |  |  |  |  |
Federal |  | $ | 16,812 |  | $ | 14,856 |  | $ | 10,047 |
State |  |  | 2,920 |  |  | 2,885 |  |  | 2,038 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  |  | 19,732 |  |  | 17,741 |  |  | 12,085 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Deferred |  |  |  |  |  |  |  |  |  |
Federal |  |  | 218 |  |  | 2,396 |  |  | (1,039 | )
State |  |  | 163 |  |  | 291 |  |  | (287 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  |  | 381 |  |  | 2,687 |  |  | (1,326 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Income tax expense |  | $ | 20,113 |  | $ | 20,428 |  | $ | 10,759 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
The differences between the U.S. federal statutory tax rate and the Company's effective tax rate for continuing operations were as follows for the years ended December 31:
|  | 2013 |  | 2012 |  | 2011 |
--- | --- | --- | --- | --- | --- | --- | ---
U.S federal statutory rate |  |  | 35.0 | % |  | 35.0 | % |  | 35.0 | %
State income taxes, net of U.S. federal income tax expense |  |  | 3.5 |  |  | 3.8 |  |  | 4.5 |
Provision to return adjustments, net |  |  | (0.3 | ) |  | (0.2 | ) |  | (0.3 | )
Deferred tax adjustments, net |  |  | — |  |  | — |  |  | (0.1 | )
Domestic production/manufacturing deduction |  |  | (2.0 | ) |  | (2.0 | ) |  | (2.7 | )
Non-deductible meals and entertainment |  |  | 0.4 |  |  | 0.4 |  |  | 0.7 |
Research and development credit |  |  | — |  |  | (0.1 | ) |  | (0.1 | )
Other, net |  |  | 0.1 |  |  | 0.5 |  |  | — |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  |  | 36.7 | % |  | 37.4 | % |  | 37.0 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
The net deferred tax assets and (liabilities) arising from temporary differences was as follows at December 31:
(in thousands) |  | 2013 |  | 2012 |
--- | --- | --- | --- | --- | ---
Deferred income tax assets: |  |  |  |  |  |  |
Self insurance reserves |  | $ | 8,643 |  | $ | 9,439 |
Contract loss reserves |  |  | 435 |  |  | 49 |
Stock-based awards |  |  | 4,245 |  |  | 5,099 |
Bonus |  |  | 2,884 |  |  | 1,931 |
Other |  |  | 2,588 |  |  | 1,322 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total deferred income tax assets |  |  | 18,795 |  |  | 17,840 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Deferred income tax liabilities: |  |  |  |  |  |  |
Property and equipment—tax over book depreciation |  |  | (24,037 | ) |  | (22,572 | )
Intangible assets—tax over book amortization |  |  | (3,927 | ) |  | (4,056 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total deferred income tax liabilities |  |  | (27,964 | ) |  | (26,628 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net deferred income taxes |  | $ | (9,169 | ) | $ | (8,788 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
The balance sheet classification of deferred income taxes is as follows:
(in thousands) |  | 2013 |  | 2012 |
--- | --- | --- | --- | --- | ---
Current deferred income tax assets |  | $ | 14,550 |  | $ | 12,742 |
Non-current deferred income tax liabilities |  |  | (23,719 | ) |  | (21,530 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  | $ | (9,169 | ) | $ | (8,788 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
The Company is subject to taxation in various jurisdictions. The Company's federal tax returns for 2009 and 2010 are currently under examination by the Internal Revenue Service. The Company remains subject to examination by U.S. federal authorities for the remaining open tax years (2011 and 2012) and by various state authorities for the years 2009 through 2012. The Company has recorded a liability for unrecognized tax benefits related to tax positions taken on its various income tax returns. If recognized, the entire amount of unrecognized tax benefits would favorably impact the effective tax rate that is reported in future periods. The Company anticipates that total unrecognized tax benefits will be reduced within the next 12 months due to the lapses in the applicable statutes of limitations, as well as pending federal tax settlements for the two years under examination. The adjustment related to these items is estimated at approximately $0.3 million. The following is a reconciliation of the beginning and ending liabilities for unrecognized tax benefits at December 31:
(in thousands) |  | 2013 |  | 2012 |
--- | --- | --- | --- | --- | ---
Balance at beginning of period |  | $ | 655 |  | $ | 567 |
Gross increases in current period tax positions |  |  | 132 |  |  | 186 |
Gross increases in prior period tax positions |  |  | 55 |  |  | 134 |
Gross decreases in prior period tax positions |  |  | (185 | ) |  | (232 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at end of period |  |  | 657 |  |  | 655 |
Accrued interest and penalties at end of period |  |  | 189 |  |  | 185 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total liability for unrecognized tax benefits |  | $ | 846 |  | $ | 840 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
The liability for unrecognized tax benefits, including accrued interest and penalties, were included in other liabilities in the accompanying consolidated balance sheets. The amount of interest and penalties charged or credited to income tax expense as a result of the unrecognized tax benefits was $0.0, $0.2 and $0.1 million for the year ended December 31, 2013, 2012 and 2011, respectively.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
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