Basis of Presentation and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Summary of Table Reconciling Basic and Diluted Net Income Per Share

The following table reconciles basic and diluted net income per share for the years ended December 31.

(dollars and shares in thousands, except per share data)	Years Ended December 31,
	2017		2016		2015
Basic Earnings Per Share
Net income	$	95,725	$	134,264	$	116,716
Weighted average common shares outstanding		137,821		127,705		115,726
Basic Net Income Per Share	$	0.69	$	1.05	$	1.01
Diluted Earnings Per Share
Net income	$	95,725	$	134,264	$	116,716
Weighted average common shares outstanding		137,821		127,705		115,726
Effect of dilutive securities:
Restricted stock (1)		599		543		440
Stock options (2)		93		53		89
Weighted average shares outstanding		138,513		128,301		116,255
Diluted Earnings Per Share	$	0.69	$	1.05	$	1.00

(1) 8 thousand shares and 3 thousand shares of restricted stock at December 31, 2017 and 2016, respectively, were not included in the computation of net income per diluted share because the effect would be antidilutive. There were no shares of restricted stock excluded at December 31, 2015 because the effect would be antidilutive.

(2) Options to purchase 0.1 million shares, 0.5 million shares, and 0.7 million shares outstanding at December 31, 2017, 2016, and 2015, respectively, were not included in the computation of net income per diluted share because the exercise price of these options was greater than the average market price of the common shares and, therefore, the effect would be antidilutive.

Summary of Supplemental Cash Flow Information

The following table summarizes the supplemental cash flow information for the years ended December 31:

	Years Ended December 31,
(dollars in thousands)	2017		2016		2015
Cash payments:
Interest	$	56,682	$	43,698	$	32,712
Income taxes (net of refunds)		4,326		23,636		14,824
Noncash Investing and Financing Activities:
Transfer of premises and equipment to assets held for sale		16,617		4,620		9,070

Summary of Common Shares Issued and Resultant Value of Total Shareholders' Equity

The following table summarizes the common shares issued and resultant value of total shareholders’ equity associated with acquisitions for the years ended December 31:

(dollars and shares in thousands)	Shares of Common Stock		Total Shareholders’ Equity
2017
Acquisition of Anchor (MN)		16,527	$	300,828
2016
Acquisition of Anchor (WI)		20,415	$	273,565
2015
Acquisition of Founders		3,402	$	50,626