Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Components of Income Tax (Expense) Benefit

Table 14.1: Components of Income Tax Expense
	For the Year Ended December 31,
	2017			2016		2015
	(in thousands)
Current income tax expense	$	19,980		$	16,323	$	5,929
Deferred tax (benefit)/expense	(3,414		)	6,504		3,407
Income tax expense	$	16,566		$	22,827	$	9,336

Components of Income (Loss) before Income Taxes by Country

Table 14.2: Components of Income before Provision for Income Taxes by Country
	For the Year Ended December 31,
	2017		2016			2015
	(in thousands)
United States	$	75,940	$	67,128		$	27,090
Canada	474		(277		)	(1,018		)
Income before provision for income taxes	$	76,414	$	66,851		$	26,072

Taxes Computed at U.S. Statutory Federal Income Tax Rate

Table 14.3: Reconciliation of Tax Expense at Statutory Tax Rate to Actual Tax Expense
	For the Year Ended December 31,
	2017			2016			2015
	(in thousands)
Tax expense at statutory rate	$	26,745		$	23,398		$	9,124
Increase/(decrease) due to:
U.S./Canadian tax rate differential	(94		)	21			(18		)
U.S. state taxes net of federal benefit	1,339			1,045			401
Non-deductible (benefit)/expense	(104		)	144			166
Domestic production activities deduction	(1,870		)	(1,719		)	(356		)
Tax credits	—			(12		)	(147		)
Change in valuation allowance	(60		)	27			272
Tax Cuts and Jobs Act of 2017	(9,168		)	—			—
Other	(222		)	(77		)	(106		)
Income tax expense	$	16,566		$	22,827		$	9,336
Statutory tax rate	35.00		%	35.00		%	35.00		%
Effective tax rate	21.68		%	34.15		%	35.81		%

Significant Components of Deferred Tax Assets and Deferred Tax Liabilities

Table 14.4: Components of Deferred Tax Assets and Liabilities
	As of December 31,
	2017			2016
	(in thousands)
Deferred tax assets:
Reserves and other liabilities	$	916		$	3,220
Tax loss carryforwards	313			661
Acquisition costs and intangibles	531			498
Equity investment	883			1,503
Deferred compensation	760			877
Inventory	536			1,432
State depreciation	201			95
Other	141			83
Valuation allowance	(507		)	(693		)
Total deferred tax assets	$	3,774		$	7,676
Deferred tax liabilities:
Prepaids	$	402		$	543
Acquisition costs and intangibles	2,214			1,074
Depreciation, amortization and other	15,909			24,012
Unrealized gains on hedges	355			788
Total deferred tax liabilities	18,880			26,417
Net deferred tax liability	$	15,106		$	18,741