Consolidated Statement of Shareholders' Equity - USD ($) $ in Thousands	Total	Retained Earnings	Common Stock	Accumulated Other Comprehensive Loss	Treasury Stock	ASB Financial Corp. Common Stock	FIRST PRESTONSBURG BANCSHARES INC. [Member] Common Stock	Restricted Shares	Restricted Shares Common Stock	Restricted Shares Treasury Stock	New Accounting Pronouncement, Early Adoption, Effect [Member] Retained Earnings
Common stockholders' equity	$ 435,261	$ 110,294	$ 344,404	$ (1,554)	$ (17,883)
Income tax expense	18,732
Income tax expense | Adjustments for New Accounting Pronouncement [Member]	900
Cumulative Effect on Retained Earnings, Net of Tax	3,700
Net income	38,471	38,471
Common shares issued under compensation plan for Board of Directors	295		88		207
Stock-based compensation					0
Common shares issued under employee stock purchase plan	365		109		256
Common shares issued under dividend reinvestment plan	525		525
Stock Issued During Period, Value, Treasury Stock Reissued	500				500			$ 0	$ (1,455)	$ 1,455
Other comprehensive income, net of tax	(2,737)
Repurchase of common shares in connection with employee incentive and director compensation plans	508				508
Stock Issued During Period, Value, Stock Options Exercised	0		(6)		6
Dividends, Common Stock, Cash	15,327	15,327
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(955)										$ 924
Other comprehensive income, net of tax	(3,661)			(3,661)
Share-based compensation expense	1,747		1,747
Deferred Revenue | Adjustments for New Accounting Pronouncement [Member]	4,700
Common stockholders' equity	458,592	134,362	345,412	(5,215)	(15,967)
Income tax expense	8,686
Income tax expense | Adjustments for New Accounting Pronouncement [Member]	700
Cumulative Effect on Retained Earnings, Net of Tax | Adjustments for New Accounting Pronouncement [Member]	3,700
Net income	46,255	46,255
Common shares issued under compensation plan for Board of Directors	298		104		194
Issuance of common shares related to acquisition of ASB	40,898					$ 40,898
Common shares issued under employee stock purchase plan	393		123		270
Common shares issued under dividend reinvestment plan	668		668
Stock Issued During Period, Value, Treasury Stock Reissued	46				46			0	(2,748)	2,748
Other comprehensive income, net of tax	(2,698)
Amounts reclassified out of retained earnings, net of tax, per ASU 2014-09 (c) | Accounting Standards Update 2014-09 [Member]		(3,713)
Repurchase of common shares in connection with employee incentive and director compensation plans	1,380				1,380
Stock Issued During Period, Value, Stock Options Exercised	0		(2)		2
Dividends, Common Stock, Cash	21,578	21,578
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(3,024)										$ 5,020
Other comprehensive income, net of tax	(7,718)			(7,718)
Other comprehensive income, net of tax	5,020
Other comprehensive income, net of tax | Adjustments for New Accounting Pronouncement [Member]	5,000
Share-based compensation expense	2,359		2,359
Common stockholders' equity	520,140	160,346	386,814	(12,933)	(14,087)
Income tax expense	11,663
Income tax expense | Adjustments for New Accounting Pronouncement [Member]	700
Net income	53,695	53,695
Common shares issued under compensation plan for Board of Directors	313		78		235
Issuance of common shares related to acquisition of ASB	32,437						$ 32,437
Common shares issued under employee stock purchase plan	423		112		311
Common shares issued under dividend reinvestment plan	904		904
Stock Issued During Period, Value, Treasury Stock Reissued	53				53			$ 0	$ (2,931)	$ 2,931
Other comprehensive income, net of tax	11,508			11,508
Repurchase of common shares in connection with employee incentive and director compensation plans	845				845
Dividends, Common Stock, Cash	26,892	26,892
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	11,638
Other comprehensive income, net of tax	11,508
Other comprehensive income, net of tax	0
Purchase of treasury stock					(805)
Share-based compensation expense	3,462		3,462
Deferred Revenue	5,190
Common stockholders' equity	$ 594,393	$ 187,149	$ 420,876	$ (1,425)	$ (12,207)