Student Loans - Aging for Loans (Details) $ in Thousands	Jun. 30, 2019 USD ($) borrower	Dec. 31, 2018 USD ($) borrower	Jun. 30, 2018 USD ($)
Amount
Current Loans	$ 562,310	$ 578,418
Past due loans	11,111	9,515
Total Loans	573,421	587,933	$ 573,996
31 - 60 days
Amount
Past due loans	1,499	162
61 - 90 days
Amount
Past due loans	$ 446	$ 139
Student loan | Repayment and Forbearance
Number of Borrowers
Number of borrowers, current | borrower	201	248
Number of borrowers | borrower	217	255
Amount
Current Loans	$ 18,066	$ 22,534
Total Loans	$ 19,081	$ 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	$ 303	$ 130
Student loan | Repayment and Forbearance | 61 - 90 days
Number of Borrowers
Number of borrowers, past due | borrower	5	4
Amount
Past due loans	$ 371	$ 140
Student loan | Repayment and Forbearance | 91 - 120 days
Number of Borrowers
Number of borrowers, past due | borrower	4	1
Amount
Past due loans	$ 281	$ 58
Student loan | Repayment and Forbearance | 121 - 180 days
Number of Borrowers
Number of borrowers, past due | borrower	1	0
Amount
Past due loans	$ 60	$ 0