The following table reports quarterly results of operations (unaudited) for 2017, 2016 and 2015:

	2017
(dollars in thousands except per share data)	Fourth Quarter		Third Quarter		Second Quarter		First Quarter
Total interest income	$	86,526	$	82,370	$	79,344	$	75,794
Total interest expense	11,167		10,434		9,646		8,900
Net interest income	75,359		71,936		69,698		66,894
Provision for credit losses	4,087		1,921		1,566		1,397
Net interest income after provision for credit losses	71,272		70,015		68,132		65,497
Noninterest income	9,496		6,784		7,023		6,070
Noninterest expense	29,803		29,516		30,001		29,232
Income before income tax expense	50,965		47,283		45,154		42,335
Income tax expense	35,396		17,409		17,382		15,318
Net income	15,569		29,874		27,772		27,017
Net income available to common shareholders	$	15,569	$	29,874	$	27,772	$	27,017
Earnings per common share
Basic (1)	$	0.46	$	0.87	$	0.81	$	0.79
Diluted (1)	$	0.45	$	0.87	$	0.81	$	0.79

	2016
(dollars in thousands except per share data)	Fourth Quarter		Third Quarter		Second Quarter		First Quarter
Total interest income	$	75,795	$	72,431	$	69,772	$	67,807
Total interest expense	8,771		7,703		5,950		5,216
Net interest income	67,024		64,728		63,822		62,591
Provision for credit losses	2,112		2,288		3,888		3,043
Net interest income after provision for credit losses	64,912		62,440		59,934		59,548
Noninterest income	7,014		6,405		7,575		6,290
Noninterest expense	29,780		28,838		28,295		28,103
Income before income tax expense	42,146		40,007		39,214		37,735
Income tax expense	16,429		15,484		15,069		14,413
Net income	25,717		24,523		24,145		23,322
Net income available to common shareholders	$	25,717	$	24,523	$	24,145	$	23,322
Earnings per common share
Basic (1)	$	0.76	$	0.73	$	0.72	$	0.70
Diluted (1)	$	0.75	$	0.72	$	0.71	$	0.68

	2015
(dollars in thousands except per share data)	Fourth Quarter		Third Quarter		Second Quarter		First Quarter
Total interest income	$	67,311	$	63,981	$	62,423	$	59,465
Total interest expense	4,735		4,896		4,873		4,734
Net interest income	62,576		59,085		57,550		54,731
Provision for credit losses	4,595		3,262		3,471		3,310
Net interest income after provision for credit losses	57,981		55,823		54,079		51,421
Noninterest income	6,492		6,099		6,233		7,804
Noninterest expense	28,640		27,405		26,598		28,073
Income before income tax expense	35,833		34,517		33,714		31,152
Income tax expense	13,485		13,054		12,776		11,734
Net income	22,348		21,463		20,938		19,418
Preferred stock dividends and discount accretion	62		180		179		180
Net income available to common shareholders	$	22,286	$	21,283	$	20,759	$	19,238
Earnings per common share
Basic (1)	$	0.67	$	0.64	$	0.62	$	0.62
Diluted (1)	$	0.65	$	0.63	$	0.61	$	0.61

(1) Earnings per common share are calculated on a quarterly basis and may not be additive to the year to date amount.