Schedule II [Disclosure] - Notes to Condensed Financial Statements (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Cash dividends paid to parent by wholly owned subsidiaries	$ 14,816,379		$ 17,330,948	$ 7,630,835
Investors Title Insurance Company, net
Condensed Financial Statements, Captions [Line Items]
Cash dividends paid (received) to (from) Parent Company	13,236,379	[1]	15,838,248	7,134,823
Cash dividends paid to parent by wholly owned subsidiaries	14,330,164		16,048,255	7,251,493
Dividend received from parent company	1,093,785		210,007	116,670
Investors Title Exchange Corporation
Condensed Financial Statements, Captions [Line Items]
Cash dividends paid to parent by wholly owned subsidiaries	300,000		100,000	245,000
Investors Title Accommodation Corporation
Condensed Financial Statements, Captions [Line Items]
Cash dividends paid to parent by wholly owned subsidiaries	80,000		45,000	12,000
Investors Capital Management Company
Condensed Financial Statements, Captions [Line Items]
Cash dividends paid to parent by wholly owned subsidiaries	0		0	9,012
Investors Trust Company
Condensed Financial Statements, Captions [Line Items]
Cash dividends paid to parent by wholly owned subsidiaries	200,000		750,000	0
Investors Title Commercial Agency, LLC
Condensed Financial Statements, Captions [Line Items]
Cash dividends paid to parent by wholly owned subsidiaries	150,000		125,000	230,000
National Investors Holdings [Member]
Condensed Financial Statements, Captions [Line Items]
Cash dividends paid to parent by wholly owned subsidiaries	$ 850,000		$ 472,700	$ 0

[1] Total dividends of $14,330,164, $16,048,255 and $7,251,493 paid to the Parent Company in 2017, 2016 and 2015, respectively, netted with dividends of $1,093,785, $210,007 and $116,670 received from the Parent Company in 2017, 2016 and 2015, respectively.