Leases - Lease Right Of Use Asset and Liability Error Correction (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Operating lease right-of-use assets, net	$ 32,739	$ 34,376	$ 35,371
Total assets	767,295	778,849	765,921	$ 739,394
Operating lease liabilities - Short-term	3,839	4,140	4,387
Total current liabilities	190,834	185,009	190,071	$ 177,964
Operating lease liabilities - Long-term	$ 30,248	31,337	31,869
Total liabilities		338,768	328,413
Amounts as reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Operating lease right-of-use assets, net		18,667	19,362
Total assets		763,140	749,912
Operating lease liabilities - Short-term		3,282	3,767
Total current liabilities		184,151	189,451
Operating lease liabilities - Long-term		15,559	15,815
Total liabilities		322,990	312,359
Headquarters' Operating Lease Right of Use Asset and Liability | Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Operating lease right-of-use assets, net		15,709	16,009
Total assets		15,709	16,009
Operating lease liabilities - Short-term		858	620
Total current liabilities		858	620
Operating lease liabilities - Long-term		15,778	16,054
Total liabilities		$ 15,778	$ 16,054