Income Taxes - Changes in Unrecognized Tax Benefit (Including Interest and Penalties) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Beginning Balance	$ 14,139	$ 12,683	$ 5,711
Additions for tax positions for current year	3,712	4,171	3,141
Additions for tax positions for prior years	889	1,454	4,132
Reduction for tax positions for prior years	(1,408)	(2,108)	(224)
Lapse of the applicable statute of limitations	(2,395)	(521)	(77)
Reduction as a result of settlement	(1,159)	(1,540)
Ending Balance	13,778	14,139	12,683
Reconciliation of Unrecognized Tax Benefit
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Beginning Balance	12,689	11,505	5,269
Additions for tax positions for current year	3,712	4,171	3,141
Additions for tax positions for prior years	63	631	3,378
Reduction for tax positions for prior years	(884)	(1,865)	(223)
Lapse of the applicable statute of limitations	(1,826)	(435)	(60)
Reduction as a result of settlement	(1,142)	(1,318)
Ending Balance	12,612	12,689	11,505
Interest and Penalties
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Beginning Balance	1,450	1,178	442
Additions for tax positions for current year	0	0	0
Additions for tax positions for prior years	826	823	754
Reduction for tax positions for prior years	(524)	(243)	(1)
Lapse of the applicable statute of limitations	(569)	(86)	(17)
Reduction as a result of settlement	(17)	(222)
Ending Balance	$ 1,166	$ 1,450	$ 1,178