CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020 USD ($) Lease	Sep. 30, 2021 USD ($) shares	Sep. 30, 2020 USD ($) Lease shares
Supplemental disclosures of non-cash investing and financing activities
Common stock issued through the dividend reinvestment plan (in shares) | shares		2,223	1,967
Common stock issued through the dividend reinvestment plan		$ 423	$ 339
Number of shares withheld to satisfy employees' tax withholding and other liabilities (in shares) | shares		75,542	73,103
Shares withheld to satisfy employees' tax withholding and other liabilities, value		$ 13,409	$ 14,752
Stock issued during period, shares, share-based compensation, forfeited (in shares) | shares		3,077
Stock issued during period, value, share-based compensation, forfeited		$ 595	1,187
Dividends declared but not paid		224,760
Change in redemption value of redeemable noncontrolling interest	$ 62
Increase (Decrease) in Derivative Assets		3,399	1,413
Cash flow hedge losses reclassified to earnings	2,367	12,138	$ 6,617
Operating Lease, Right-of-Use Asset		126,699
Total lease liabilities		154,790
Interest Expense
Supplemental disclosures of non-cash investing and financing activities
Cash flow hedge losses reclassified to earnings		6,874
Gain (Loss) on Extinguishment of Debt
Supplemental disclosures of non-cash investing and financing activities
Cash flow hedge losses reclassified to earnings		$ 5,264
Restricted Stock and Restricted Stock Converted From Performance Shares
Supplemental disclosures of non-cash investing and financing activities
Equity instruments granted (in shares) | shares		153,379	165,426
Performance Shares
Supplemental disclosures of non-cash investing and financing activities
Equity instruments granted (in shares) | shares		138,033
Converted to restricted stock (in shares) | shares		56,545
Restricted stock
Supplemental disclosures of non-cash investing and financing activities
Equity instruments granted (in shares) | shares		96,834	69,109
Fair value of shares issued		$ 17,187	$ 15,285
Stock issued during period, shares, share-based compensation, forfeited (in shares) | shares		3,077	7,421
Restricted Stock Converted From Performance Shares
Supplemental disclosures of non-cash investing and financing activities
Equity instruments granted (in shares) | shares		0	96,317
Common stock
Supplemental disclosures of non-cash investing and financing activities
Dividends declared but not paid	223,391	$ 223,380	$ 223,391
Accumulated earnings less dividends
Supplemental disclosures of non-cash investing and financing activities
Change in redemption value of redeemable noncontrolling interest	62	$ (789)	387
Accounting Standards Update 2016-02
Supplemental disclosures of non-cash investing and financing activities
Operating Lease, Right-of-Use Asset	46,875		46,875
Total lease liabilities	$ 46,875		$ 46,875
New Office Leases
Supplemental disclosures of non-cash investing and financing activities
Number of new office leases | Lease	2		2