Regulatory Matters (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
Regulatory Matters [Abstract]
Undivided profits			$ 2,100
Request for approval to transfer capital from bank to parent entity	$ 18,000	$ 18,500
Components of regulatory capital [Abstract]
Total shareholders' equity			246,923	$ 251,092	$ 254,375	$ 250,371
Add (deduct) [Abstract]
Accumulated other comprehensive (income) loss for regulatory purposes			(3,283)	(6,036)
Intangible assets			(2,106)	(2,280)
Consolidated [Member]
Total capital to risk-weighted assets [Abstract]
Total risk-based capital			275,163	278,170
Minimum for Adequately Capitalized Institutions, Amount			$ 137,844	$ 133,668
Actual, Ratio			15.97%	16.65%
Minimum for Adequately Capitalized Institutions, Ratio			8.00%	8.00%
Tier 1 capital to risk-weighted assets [Abstract]
Actual, Amount			$ 253,484	$ 257,050
Minimum for Adequately Capitalized Institutions, Amount			$ 103,383	$ 100,251
Actual, Ratio			14.71%	15.38%
Minimum for Adequately Capitalized Institutions, Ratio			6.00%	6.00%
Common equity tier 1 capital to risk-weighted assets [Abstract]
Actual, Amount			$ 228,648	$ 239,271
Minimum for Adequately Capitalized Institutions, Amount			$ 77,537	$ 75,188
Actual, Ratio			13.27%	14.32%
Minimum for Adequately Capitalized Institutions, Ratio			4.50%	4.50%
Tier 1 capital to average assets [Abstract]
Tier 1 capital			$ 253,484	$ 257,050
Minimum for Adequately Capitalized Institutions, Amount			$ 96,803	$ 94,217
Actual, Ratio			10.47%	10.91%
Minimum for Adequately Capitalized Institutions, Ratio			4.00%	4.00%
Components of regulatory capital [Abstract]
Total shareholders' equity			$ 246,923	$ 251,092
Add (deduct) [Abstract]
Accumulated other comprehensive (income) loss for regulatory purposes			(2,515)	238
Intangible assets			(1,264)	(912)
Disallowed deferred tax assets			(14,496)	(11,147)
Common equity tier 1 capital			228,648	239,271
Qualifying trust preferred securities			34,500	34,500
Disallowed deferred tax assets			(9,664)	(16,721)
Tier 1 capital			253,484	257,050
Allowance for loan losses and allowance for unfunded lending commitments limited to 1.25% of total risk-weighted assets			21,679	21,120
Total risk-based capital			275,163	278,170
Independent Bank [Member]
Total capital to risk-weighted assets [Abstract]
Total risk-based capital			260,344	261,894
Minimum for Adequately Capitalized Institutions, Amount			137,712	133,514
Minimum for Well Capitalized Institutions, Amount			$ 172,140	$ 166,893
Actual, Ratio			15.12%	15.69%
Minimum for Adequately Capitalized Institutions, Ratio			8.00%	8.00%
Minimum for Well-Capitalized Institutions, Ratio			10.00%	10.00%
Tier 1 capital to risk-weighted assets [Abstract]
Actual, Amount			$ 238,734	$ 240,867
Minimum for Adequately Capitalized Institutions, Amount			103,284	100,136
Minimum for Well-Capitalized Institutions, Amount			$ 137,712	$ 133,514
Actual, Ratio			13.87%	14.43%
Minimum for Adequately Capitalized Institutions, Ratio			6.00%	6.00%
Minimum for Well Capitalized Institutions, Ratio			8.00%	8.00%
Common equity tier 1 capital to risk-weighted assets [Abstract]
Actual, Amount			$ 238,734	$ 240,867
Minimum for Adequately Capitalized Institutions, Amount			77,463	75,102
Minimum for Well-Capitalized Institutions, Amount			$ 111,891	$ 108,480
Actual, Ratio			13.87%	14.43%
Minimum for Adequately Capitalized Institutions, Ratio			4.50%	4.50%
Minimum for Well Capitalized Institutions, Ratio			6.50%	6.50%
Tier 1 capital to average assets [Abstract]
Tier 1 capital			$ 238,734	$ 240,867
Minimum for Adequately Capitalized Institutions, Amount			96,737	94,145
Minimum for Well-Capitalized Institutions, Amount			$ 120,921	$ 117,682
Actual, Ratio			9.87%	10.23%
Minimum for Adequately Capitalized Institutions, Ratio			4.00%	4.00%
Minimum for Well-Capitalized Institutions, Ratio			5.00%	5.00%
Components of regulatory capital [Abstract]
Total shareholders' equity			$ 256,850	$ 259,947
Add (deduct) [Abstract]
Accumulated other comprehensive (income) loss for regulatory purposes			(2,514)	238
Intangible assets			(1,264)	(912)
Disallowed deferred tax assets			(14,338)	(18,406)
Common equity tier 1 capital			238,734	240,867
Qualifying trust preferred securities			0	0
Disallowed deferred tax assets			0	0
Tier 1 capital			238,734	240,867
Allowance for loan losses and allowance for unfunded lending commitments limited to 1.25% of total risk-weighted assets			21,610	21,027
Total risk-based capital			$ 260,344	$ 261,894