Note 21: Immaterial Error Corrections: Schedule of Error Corrections and Prior Period Adjustments (Details) - USD ($)	3 Months Ended												12 Months Ended
	Dec. 30, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jan. 31, 2014
Mortgage fee income													$ 186,416,311	$ 175,726,692	$ 129,138,941
Total revenues													307,208,416	284,564,240	227,378,617
Earnings before income taxes													20,740,363	21,224,805	12,922,896
Income tax expense													6,460,859	7,745,948	4,898,663
Net earnings													$ 14,279,504	$ 13,478,857	$ 8,024,233
Net earnings per Class A Equivalent common share (1)													$ 0.96	$ 0.93	$ 0.58
Net earnings per Class A equivalent common share - assuming dilution(1)													$ 0.94	$ 0.90	$ 0.56
Net unrealized gains on derivative instruments													$ 6,490	$ 10,628	$ 16,433
Other comprehensive gain (loss)													764,180	(760,715)	(49,415)
Accumulated other comprehensive income, net of taxes					$ (499,358)								264,822	(499,358)
Retained earnings					54,054,950								$ 63,029,627	54,054,950
Scenario, Previously Reported
Mortgage fee income														174,323,452	128,696,998
Total revenues	$ 74,147,490	$ 85,239,768	$ 81,739,601	$ 66,014,315	67,576,067	$ 75,494,686	$ 76,040,615	$ 64,049,632	$ 60,745,876	$ 61,725,792	$ 59,411,730	$ 45,053,276		283,161,000	226,936,674
Earnings before income taxes														19,821,565	12,480,953
Income tax expense	$ 233,548	$ 2,520,279	$ 2,623,575	$ 1,057,233	$ 779,716	$ 2,904,615	$ 2,379,673	$ 1,134,681	$ 1,896,814	$ 1,239,318	$ 1,563,034	$ 27,139		(7,198,685)	(4,726,305)
Net earnings														$ 12,622,880	$ 7,754,648
Net earnings per Class A Equivalent common share (1)	$ 0.12	$ 0.36	$ 0.36	$ 0.12	$ 0.14	$ 0.34	$ 0.27	$ 0.13	$ 0.20	$ 0.15	$ 0.19	$ 0.01		$ 0.87	$ 0.56
Net earnings per Class A equivalent common share - assuming dilution(1)	$ 0.12	$ 0.31	$ 0.35	$ 0.12	$ 0.13	$ 0.32	$ 0.26	$ 0.13	$ 0.20	$ 0.15	$ 0.18	$ 0.01		$ 0.84	$ 0.54
Net unrealized gains on derivative instruments														$ 866,605	$ 286,018
Other comprehensive gain (loss)														95,262	220,170
Accumulated other comprehensive income, net of taxes					$ 1,533,828				$ 1,438,566					1,533,828	1,438,566	$ 1,218,396
Retained earnings					52,021,764				44,101,252					52,021,764	44,101,252	39,666,587
Scenario, Adjustment
Mortgage fee income														1,403,240	441,943
Total revenues														1,403,240	441,943
Earnings before income taxes														1,403,240	441,943
Income tax expense														(547,263)	(172,358)
Net earnings														$ 855,977	$ 269,585
Net earnings per Class A Equivalent common share (1)														$ 0.06	$ 0.02
Net earnings per Class A equivalent common share - assuming dilution(1)														$ 0.06	$ 0.02
Net unrealized gains on derivative instruments														$ (855,977)	$ (269,585)
Other comprehensive gain (loss)														(855,977)	(269,585)
Accumulated other comprehensive income, net of taxes					(2,033,186)				(1,177,209)					(2,033,186)	(1,177,209)	(907,624)
Retained earnings					2,033,186				1,177,209					2,033,186	1,177,209	907,624
Restatement Adjustment
Mortgage fee income														175,726,692	129,138,941
Total revenues		$ 84,393,427	$ 81,312,192	$ 67,355,307	66,671,215	$ 74,062,877	$ 77,292,625	$ 66,537,523	60,662,683	$ 61,012,516	$ 60,200,879	$ 45,502,539		284,564,240	227,378,617
Earnings before income taxes														21,224,805	12,922,896
Income tax expense		$ 2,190,206	$ 2,456,885	$ 1,580,220	$ 426,823	$ 2,346,210	$ 2,867,957	$ 2,104,958	$ 1,864,368	$ 961,140	$ 1,870,803	$ 202,352		(7,745,948)	(4,898,663)
Net earnings														$ 13,478,857	$ 8,024,233
Net earnings per Class A Equivalent common share (1)		$ 0.32	$ 0.35	$ 0.18	$ 0.10	$ 0.28	$ 0.32	$ 0.24	$ 0.20	$ 0.12	$ 0.22	$ 0.03		$ 0.93	$ 0.58
Net earnings per Class A equivalent common share - assuming dilution(1)		$ 0.31	$ 0.34	$ 0.17	$ 0.10	$ 0.26	$ 0.31	$ 0.23	$ 0.19	$ 0.12	$ 0.22	$ 0.03		$ 0.90	$ 0.56
Net unrealized gains on derivative instruments														$ 10,628	$ 16,433
Other comprehensive gain (loss)														(760,715)	(49,415)
Accumulated other comprehensive income, net of taxes					$ (499,358)				$ 261,357					(499,358)	261,357	310,772
Retained earnings					$ 54,054,950				$ 45,278,461					$ 54,054,950	$ 45,278,461	$ 40,574,211