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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2016
Income Tax Disclosure [Abstract]  
Income before income taxes by geographic area
Income/(loss) before income taxes by geographic area was as follows:
 
 
Year Ended December 31,
 
 
2016
 
2015
 
2014
 
 
(In thousands)
Domestic
 
$
222,178

 
$
231,798

 
$
174,964

Foreign
 
5,193

 
(49,627
)
 
(10,564
)
Total income before income taxes
 
$
227,371

 
$
182,171

 
$
164,400

Federal, state and foreign income taxes
Federal, state and foreign income tax provisions/(benefits) were as follows:
 
 
Year Ended December 31,
 
 
2016
 
2015
 
2014
 
 
(In thousands)
Federal:
 
 
 
 
 
 
Current
 
$
57,321

 
$
66,973

 
$
49,590

Deferred
 
18,704

 
15,528

 
22,549

State:
 
 
 
 
 
 
Current
 
4,636

 
5,165

 
4,849

Deferred
 
1,878

 
1,768

 
727

Foreign:
 
 
 
 
 
 
Current
 
4,187

 
4,150

 
4,638

Deferred
 
(6,420
)
 
(5,412
)
 
(10,957
)
Provision for income taxes
 
$
80,306

 
$
88,172

 
$
71,396

Difference between the income tax computation by the company and the statutory body
Actual income tax expense differed from income tax expense computed by applying the U.S. federal statutory corporate tax rate of 35% to income before income taxes in 2016, 2015 and 2014 as follows:
 
 
Year Ended December 31,
 
 
2016
 
2015
 
2014
 
 
(In thousands)
Provision at the U.S. federal statutory rate
 
$
79,580

 
$
63,760

 
$
57,540

Increase (decrease) resulting from:
 
 
 
 
 
 
State income tax, net of benefit for federal deduction
 
4,230

 
4,448

 
5,267

Foreign income tax rate differential
 
(2,799
)
 
(2,002
)
 
(3,188
)
Employment credits
 
(821
)
 
(407
)
 
(481
)
Changes in valuation allowances
 
749

 
14,667

 
9,507

Non-deductible goodwill
 
34

 
4,651

 

Deductible goodwill
 

 

 
(10,209
)
Stock-based compensation
 
368

 
386

 
245

Convertible debt redemption
 

 

 
9,727

Other
 
(1,035
)
 
2,669

 
2,988

Provision for income taxes
 
$
80,306

 
$
88,172


$
71,396

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
The tax effects of these temporary differences representing deferred tax assets/liabilities resulted principally from the following:
 
 
December 31,
 
 
2016
 
2015
 
 
(In thousands)
Deferred tax assets:
 
 
 
 
Loss reserves and accruals
 
$
59,884

 
$
53,747

Interest rate swaps
 
5,598

 
11,671

Goodwill and intangible franchise rights
 
5,907

 
7,621

U.S. state net operating loss (“NOL”) carryforwards
 
16,848

 
17,413

Depreciation expense
 
775

 

Foreign NOL carryforwards
 
34,946

 
20,408

Deferred tax assets
 
123,958

 
110,860

Valuation allowance on deferred tax assets
 
(53,946
)
 
(46,547
)
Net deferred tax assets
 
$
70,012

 
$
64,313

Deferred tax liabilities:
 
 
 
 
Goodwill and intangible franchise rights
 
$
(160,439
)
 
$
(143,509
)
Depreciation expense
 
(64,465
)
 
(53,619
)
Deferred gain on bond redemption
 
(1,023
)
 
(1,535
)
Other
 
(3,317
)
 
(1,060
)
Deferred tax liabilities
 
(229,244
)
 
(199,723
)
Net deferred tax liability
 
$
(159,232
)
 
$
(135,410
)