Earnings Per Common Share

The computations of basic and diluted earnings per common share were as follows:



	Year Ended December 31,
(Dollars in thousands, except per share data)	2018		2017		2016
Basic Earnings Per Common Share:
Net income attributable to TCF Financial Corporation	$	304,358	$	268,637	$	212,124
Preferred stock dividends	11,588		19,904		19,388
Impact of preferred stock redemption⁽¹⁾	3,481		5,779		—
Net income available to common stockholders	289,289		242,954		192,736
Less: Earnings allocated to participating securities	42		42		49
Earnings allocated to common stock	$	289,247	$	242,912	$	192,687
Weighted-average common shares outstanding used in basic earnings per common share calculation	165,585,493		168,679,501		167,219,964
Basic earnings per common share	$	1.75	$	1.44	$	1.15

Diluted Earnings Per Common Share:
Earnings allocated to common stock	$	289,247	$	242,912	$	192,687
Weighted-average common shares outstanding used in basic earnings per common share calculation	165,585,493		168,679,501		167,219,964
Net dilutive effect of:
Non-participating restricted stock	600,884		353,610		505,162
Stock options	2,332		28,625		82,325
Warrants	372,996		27,508		—
Weighted-average common shares outstanding used in diluted earnings per common share calculation	166,561,705		169,089,244		167,807,451
Diluted earnings per common share	$	1.74	$	1.44	$	1.15


(1)	Amounts represent the deferred stock issuance costs originally recorded in preferred stock that were reclassified to retained earnings.

For 2018 and 2017, there were 878,366 and 750,623, respectively, outstanding shares related to non-participating restricted stock that were not included in the computation of diluted earnings per common share because they were anti-dilutive. For 2016, there were 4,707,629 outstanding shares related to warrants and non-participating restricted stock that were not included in the computation of diluted earnings per common share because they were anti-dilutive.