Income Taxes - (Tables)

12 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Summarized Statement of Components of Income Tax Provision

The income tax provision for the years ended December 31, 2018, 2017 and 2016, is comprised of the following components:

	For the Year Ended December 31, 2018
	Federal			State			Total
Current expense	$	9,136		$	2,426		$	11,562
Tax credits/true-up	(5,841		)	(175		)	(6,016		)
Change in deferred expense/(benefit)	3,730			(32		)	3,698
Total tax expense	$	7,025		$	2,219		$	9,244

	For the Year Ended December 31, 2017
	Federal			State			Total
Current expense	$	5,677		$	1,662		$	7,339
Tax credits/true-up	(5,573		)	(383		)	(5,956		)
Change in deferred expense	1,700			542			2,242
Total tax expense	$	1,804		$	1,821		$	3,625

	For the Year Ended December 31, 2016
	Federal			State			Total
Current expense	$	14,627		$	2,368		$	16,995
Tax credits/true-up	(312		)	—			(312		)
Change in deferred benefit	(369		)	(467		)	(836		)
Total tax expense	$	13,946		$	1,901		$	15,847

Schedule of Reconciliation of Statutory Income Tax Provisions to the Effective Income Tax Provisions

A reconciliation of the statutory income tax provisions to the effective income tax provisions for the periods indicated is as follows:

	For the Year Ended December 31,
	2018					2017					2016
Expected tax at statutory rate	$	95,828		21.0	%	$	186,274		35.0	%	$	144,708		35.0	%
Non-taxable REIT income	(83,022		)	(18.2	)%	(170,811		)	(32.1	)%	(131,112		)	(31.7	)%
State and local tax expense - net of federal benefit	2,385			0.5	%	2,306			0.4	%	2,399			0.6	%
Change in valuation allowance	(1,052		)	(0.2	)%	159			—	%	(845		)	(0.2	)%
Tax credits/true-up	(6,016		)	(1.3	)%	(5,956		)	(1.1	)%	(312		)	(0.1	)%
Remeasurement of deferred balances	—			—	%	(8,460		)	(1.6	)%	—			—	%
Miscellaneous	1,121			0.2	%	113			—	%	1,009			0.2	%
Total provision	$	9,244		2.0	%	$	3,625		0.6	%	$	15,847		3.8	%

Schedule of Major Sources of Temporary Differences Stated at their Deferred Tax Effects

The major sources of temporary differences stated at their deferred tax effects are as follows:

	December 31, 2018			December 31, 2017
Deferred tax liabilities:
Fixed assets	$	(20,907	)	$	(15,271	)
Other	(96		)	(108		)
State deferred taxes	(3,076		)	(2,822		)
Total deferred tax liabilities	(24,079		)	(18,201		)
Deferred tax assets:
Captive insurance subsidiary	324			252
Accrued liabilities	1,772			873
Stock compensation	1,604			1,287
Solar credit	—			43
Other	53			57
SmartStop TRS	219			219
State deferred taxes	7,196			7,802
Total deferred tax assets	11,168			10,533
Valuation allowance	(3,872		)	(4,924		)
Net deferred income tax liabilities	$	(16,783	)	$	(12,592	)