Below is a summary of PCI loans by category at March 31, 2019 which includes preliminary fair value adjustments related to the Trinity acquisition and December 31, 2018:



	March 31, 2019			December 31, 2018
(in thousands)	Weighted- Average Risk Rating¹	Recorded Investment PCI Loans		Weighted- Average Risk Rating¹	Recorded Investment PCI Loans
Commercial and industrial	4.75	$	17,613	6.09	$	2,159
Real estate:
Commercial - investor owned	6.68	42,948		7.19	23,939
Commercial - owner occupied	6.81	35,026		7.39	9,669
Construction and land development	6.16	10,481		6.03	4,548
Residential	6.20	16,171		6.40	6,082
Total real estate loans		122,239			46,397
Consumer and other	3.58	264		2.18	4
Total		$	122,503		$	46,401
¹Risk ratings are based on the borrower’s contractual obligation, which is not reflective of the purchase discount.

The aging of the recorded investment in past due PCI loans by portfolio class and category at March 31, 2019 and December 31, 2018, is shown below:



	March 31, 2019
(in thousands)	30-89 Days Past Due		90 or More Days Past Due		Total Past Due		Current		Total
Commercial and industrial	$	945	$	—	$	945	$	16,668	$	17,613
Real estate:
Commercial - investor owned	1,580		1,868		3,448		39,500		42,948
Commercial - owner occupied	751		6,358		7,109		27,917		35,026
Construction and land development	152		258		410		10,071		10,481
Residential	1,648		849		2,497		13,674		16,171
Consumer and other	—		—		—		264		264
Total	$	5,076	$	9,333	$	14,409	$	108,094	$	122,503



	December 31, 2018
(in thousands)	30-89 Days Past Due		90 or More Days Past Due		Total Past Due		Current		Total
Commercial and industrial	$	—	$	—	$	—	$	2,159	$	2,159
Real estate:
Commercial - investor owned	416		88		504		23,435		23,939
Commercial - owner occupied	591		6,279		6,870		2,799		9,669
Construction and land development	—		—		—		4,548		4,548
Residential	146		37		183		5,899		6,082
Consumer and other	—		—		—		4		4
Total	$	1,153	$	6,404	$	7,557	$	38,844	$	46,401

The following table is a roll forward of PCI loans, net of the allowance for loan losses, for the three months ended March 31, 2019 and 2018.



(in thousands)	Contractual Cashflows			Non-accretable Difference			Accretable Yield			Carrying Amount
Balance December 31, 2018	$	73,157		$	15,299		$	12,638		$	45,220
Acquisitions	120,713			11,531			28,520			80,662
Principal reductions and interest payments	(10,033		)	—			—			(10,033		)
Accretion of loan discount	—			—			(1,603		)	1,603
Changes in contractual and expected cash flows due to remeasurement	4,081			(6		)	94			3,993
Reductions due to disposals	(120		)	(28		)	—			(92		)
Balance March 31, 2019	$	187,798		$	26,796		$	39,649		$	121,353

Balance December 31, 2017	$	112,710		$	29,005		$	13,962		$	69,743
Principal reductions and interest payments	(12,142		)	—			—			(12,142		)
Accretion of loan discount	—			—			(1,755		)	1,755
Changes in contractual and expected cash flows due to remeasurement	2,863			—			—			2,863
Balance March 31, 2018	$	103,431		$	29,005		$	12,207		$	62,219

The accretable yield is recognized in interest income over the estimated life of the acquired loans using the effective yield method. Outstanding customer balances on PCI loans were $151.1 million and $64.7 million as of March 31, 2019, and December 31, 2018, respectively.