Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

Amounts used in the determination of basic and diluted earnings per share for the years ended December 31, 2018, 2017 and 2016, are shown in the table below:

(Dollars and number of shares in thousands, except per share data)	2018			2017			2016
Net income attributable to Heartland	$	116,998		$	75,272		$	80,349
Preferred dividends	(39		)	(58		)	(292		)
Interest expense on convertible preferred debt	—			12			51
Net income available to common stockholders	$	116,959		$	75,226		$	80,108
Weighted average common shares outstanding for basic earnings per share	33,012			28,168			24,573
Assumed incremental common shares issued upon vesting of restricted stock units	201			258			300
Weighted average common shares for diluted earnings per share	33,213			28,426			24,873
Earnings per common share — basic	$	3.54		$	2.67		$	3.26
Earnings per common share — diluted	$	3.52		$	2.65		$	3.22