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Income Taxes Disclosure - Income Taxes from Continuing Operations (Tables)
12 Months Ended
Dec. 31, 2014
Income Tax Disclosure [Abstract]  
Schedule of Income before Income Tax, Domestic and Foreign
The components of income from continuing operations before income taxes were as follows:
 
Year Ended December 31,
Dollars in thousands
2014
 
2013
 
2012
U.S. operations
$
188,473

 
$
259,057

 
$
263,730

Foreign operations
2,368

 
3,341

 
2,784

Total income from continuing operations before income taxes
$
190,841

 
$
262,398

 
$
266,514

Schedule of Components of Income Tax Expense (Benefit)
The components of income tax expense from continuing operations were as follows:
 
Year Ended December 31,
Dollars in thousands
2014
 
2013
 
2012
Current:
 
 
 
 
 
U.S. Federal
$
69,117

 
$
38,876

 
$

State and local
12,294

 
10,104

 
4,142

Foreign
415

 
(424
)
 
7

Total current
81,826

 
48,556

 
4,149

Deferred:
 
 
 
 
 
U.S. Federal
(16,232
)
 
(3,642
)
 
87,715

State and local
427

 
(5,653
)
 
8,002

Foreign
143

 
449

 
345

Total deferred
(15,662
)
 
(8,846
)
 
96,062

Total income tax expense
$
66,164

 
$
39,710

 
$
100,211

Schedule of Effective Income Tax Rate Reconciliation
Rate Reconciliation
The income tax expense differs from the amount that would result by applying the U.S. statutory rate to income before income taxes as follows:
 
Year Ended December 31,
 
2014
 
2013
 
2012
U.S Federal tax expense at statutory rates
35.0
 %
 
35.0
 %
 
35.0
 %
State income taxes, net of federal benefit
4.1

 
3.9

 
3.9

Federal and state credits
(1.1
)
 
(0.9
)
 
(0.8
)
Domestic production activities deduction
(3.6
)
 
(0.6
)
 

Recognition of outside basis differences
(1.1
)
 
(15.4
)
 

ecoATM option payments
1.4

 
0.7

 

Valuation allowance

 
2.3

 

Acquisition of ecoATM

 
(9.3
)
 

Other

 
(0.6
)
 
(0.5
)
Effective tax rate
34.7
 %
 
15.1
 %
 
37.6
 %
Summary of Income Tax Contingencies
The aggregate changes in the balance of unrecognized tax benefits were as follows:
Dollars in thousands
Year Ended December 31,
2014
 
2013
 
2012
Balance, beginning of the year
$
2,781

 
$
2,383

 
$
2,455

Additions based on tax positions related to the current year
1,836

 
824

 

Additions for tax positions related to prior years
806

 
18

 
251

Reductions for tax positions related to prior years

 
(257
)
 
(71
)
Reductions from lapse of applicable statute of limitations
(784
)
 
(49
)
 
(252
)
Settlements

 
(138
)
 

Balance, end of year
$
4,639

 
$
2,781

 
$
2,383

Schedule of Deferred Tax Assets and Liabilities
Significant components of our deferred tax assets and liabilities and the net increase (decrease) in the valuation allowance were as follows:
Dollars in thousands
December 31,
2014
 
2013
Deferred tax assets:
 
 
 
Income tax loss carryforwards
$
5,690

 
$
7,347

Capital loss carryforwards
5,930

 
5,917

Credit carryforwards
2,929

 
2,289

Accrued liabilities and allowances
22,652

 
14,929

Stock-based compensation
11,901

 
12,547

Intangible assets
17,166

 
17,252

Investment basis

 
3,968

Other
3,776

 
2,148

Gross deferred tax assets
70,044

 
66,397

Less: Valuation Allowance
(6,898
)
 
(6,898
)
Total deferred tax assets
63,146

 
59,499

Deferred tax liabilities:
 
 
 
Property and equipment
(68,417
)
 
(93,407
)
Product costs
(43,140
)
 
(40,757
)
Convertible debt interest

 
(552
)
Total deferred tax liabilities
(111,557
)
 
(134,716
)
Net deferred tax liabilities
$
(48,411
)
 
$
(75,217
)
Summary of Valuation Allowance
Change in Valuation Allowance 
Dollars in thousands
Year Ended December 31,
2014
 
2013
 
2012
Increase in valuation allowance
$

 
$
6,898

 
$

Summary of Operating Loss Carryforwards
Our deferred tax assets relating to income tax loss carryforwards and expiration periods are summarized as follows: 
Dollars in thousands
December 31, 2014
Federal
 
State
 
Foreign
Net operating loss carryforwards
$
257

 
$
36,457

 
$
16,448

Deferred tax assets related to net operating loss carryforwards
$
90

 
$
1,286

 
$
4,314

Years that net operating loss carryforwards will expire between
2029 to 2034

 
2019 and 2034

 
2033 and 2035

Summary of Tax Credit Carryforwards
The following table shows our U.S. state tax credits and related expiration periods. Based upon our projections for future taxable income, we believe it is more likely than not that we will realize the benefits of these credits prior to their expiration.
Dollars in thousands
December 31, 2014
Amount
 
Expiration
U.S state tax credits:
 
 
 
Illinois state tax credits
$
3,388

 
2016 to 2017
California U.S. state tax credits
1,118

 
Do not expire
Total U.S. state tax credits
$
4,506