Student Loans - Aging for Loans (Details) $ in Thousands	Mar. 31, 2019 USD ($) borrower	Dec. 31, 2018 USD ($) borrower	Mar. 31, 2018 USD ($)
Amount
Current Loans	$ 570,278	$ 578,418
Past due loans	9,622	9,515
Total Loans	579,900	587,933	$ 595,882
31 - 60 days
Amount
Past due loans	561	162
61 - 90 days
Amount
Past due loans	102	139
91 - 120 days
Amount
Past due loans	$ 8,959	$ 9,214
Student loan | Repayment and Forbearance
Number of Borrowers
Number of borrowers, current | borrower	224	248
Number of borrowers | borrower	233	255
Amount
Current Loans	$ 19,043	$ 22,534
Total Loans	$ 19,840	$ 22,862
Student loan | Repayment and Forbearance | 31 - 60 days
Number of Borrowers
Number of borrowers, past due | borrower	6	2
Amount
Past due loans	$ 561	$ 130
Student loan | Repayment and Forbearance | 61 - 90 days
Number of Borrowers
Number of borrowers, past due | borrower	2	4
Amount
Past due loans	$ 102	$ 140
Student loan | Repayment and Forbearance | 91 - 120 days
Number of Borrowers
Number of borrowers, past due | borrower	1	1
Amount
Past due loans	$ 134	$ 58