Summary of Quarterly Statements of Income (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2015

Selected Quarterly Financial Information [Abstract]

Schedule of Quarterly Financial Information

The following quarterly information is unaudited. However, in the opinion of management, the information reflects all adjustments that are necessary for the fair presentation of the results of operations for the periods presented.

	2015
	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Total
	(In thousands, except per share data)
Interest income	$	62,630	$	69,679	$	78,851	$	80,629	$	291,789
Interest expense	3,450		3,944		5,234		5,153		17,781
Net interest income	59,180		65,735		73,617		75,476		274,008
Provision for loan losses	1,500		1,500		1,500		2,000		6,500
Noninterest income	19,275		20,674		20,215		20,052		80,216
Operating expenses	51,020		56,785		58,265		57,824		223,894
Income before income taxes	25,935		28,124		34,067		35,704		123,830
Federal income tax expense	8,100		9,100		9,600		10,200		37,000
Net income	$	17,835	$	19,024	$	24,467	$	25,504	$	86,830
Net income per common share:
Basic	$	0.54	$	0.54	$	0.64	$	0.67	$	2.41
Diluted	0.54		0.54		0.64		0.66		2.39
Cash dividends declared per common share	0.24		0.24		0.26		0.26		1.00

	2014
	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Total
	(In thousands, except per share data)
Interest income	$	53,645	$	55,180	$	56,629	$	61,807	$	227,261
Interest expense	3,866		3,720		3,561		3,563		14,710
Net interest income	49,779		51,460		53,068		58,244		212,551
Provision for loan losses	1,600		1,500		1,500		1,500		6,100
Noninterest income	13,716		15,801		15,351		18,227		63,095
Operating expenses	42,182		42,425		42,702		52,616		179,925
Income before income taxes	19,713		23,336		24,217		22,355		89,621
Federal income tax expense	5,900		7,100		7,450		7,050		27,500
Net income	$	13,813	$	16,236	$	16,767	$	15,305	$	62,121
Net income per common share:
Basic	$	0.46	$	0.54	$	0.51	$	0.47	$	1.98
Diluted	0.46		0.54		0.51		0.46		1.97
Cash dividends declared per common share	0.23		0.23		0.24		0.24		0.94