Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]

0001344596 (http://www.sec.gov/CIK)

Income Tax Disclosure [Abstract]	Period [Axis]
	2016-01-01 - 2016-12-31
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	Income tax expense consists of:   Years Ended December 31,   2016   2015   2014   (in thousands) Current:           Federal $ 10,262   $ 11,322   $ (10,569 ) State and local 642   3,587   3,100 Foreign 494   738   174 Total current 11,398   15,647   (7,295 ) Deferred           Federal 26,955   56,431   63,577 State and local 3,148   5,221   8,804 Foreign 36   (8 )   (12 ) Total deferred 30,139   61,644   72,369 Total income tax expense $ 41,537   $ 77,291   $ 65,074
Summary of Federal statutory income tax rate attributable to earnings (loss) from operations	The reconciliation of income taxes computed at the United States federal statutory tax rate to income tax expense is:    Years Ended December 31,   2016   2015   2014   (in thousands) Computed income tax expense $ 39,970   $ 73,760   $ 57,612 State and local tax expense 2,221   4,207   6,709 Permanent differences, including domestic production activities deduction (623 )   (724 )   523 Adjustments for uncertain tax positions 110   204   206 Other, net (141 )   (156 )   24 Total income tax expense $ 41,537   $ 77,291   $ 65,074
Summary of deferred tax assets and liabilities	The net deferred tax asset (liability) is classified as non-current in the consolidated balance sheets as follows:    December 31,   2016   2015   (in thousands) Deferred tax assets $ 18,843   $ 14,076 Deferred tax liability (271,786 )   (236,414 ) Deferred tax liability, net (252,943 )   (222,338 )   Years Ended December 31,   2016   2015   2014   (in thousands) Computed income tax expense $ 39,970   $ 73,760   $ 57,612 State and local tax expense 2,221   4,207   6,709 Permanent differences, including domestic production activities deduction (623 )   (724 )   523 Adjustments for uncertain tax positions 110   204   206 Other, net (141 )   (156 )   24 Total income tax expense $ 41,537   $ 77,291   $ 65,074 The tax effects of temporary differences that have given rise to deferred tax assets and liabilities are presented below:
Summary of changes in the balance of unrecognized tax benefits	The aggregate changes in the balance of unrecognized tax benefits were as follows:    Years Ended December 31,   2016   2015   2014   (in thousands) Beginning balance $ 1,684   $ 1,422   $ 1,142 Increases in tax positions for prior years 253   30   91 Increases in tax positions for current year 86   298   189 Settlements and decreases in tax positions —   (66 )   — Ending balance $ 2,023   $ 1,684   $ 1,422