Subsequent Events	3 Months Ended
Mar. 31, 2013
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events: NNN reviewed its subsequent events and transactions that have occurred after March 31, 2013, the date of the condensed consolidated balance sheet. In April 2013, NNN closed on its public offering of $350,000,000 principal amount of 3.300% senior unsecured notes due April 15, 2023 (“2023 Notes”). The public offering price was 99.259% of the principal amount for a yield of 3.388%. The 2023 Notes are senior unsecured obligations of the Company and are registered under the Company's existing shelf registration statement filed with the Securities and Exchange Commission. NNN used a portion of the net proceeds from this offering to repay NNN's outstanding indebtedness under its Credit Facility and NNN intends to use the remainder of the net proceeds to fund future property acquisitions and for general corporate purposes. Additionally, in connection with this note issuance, NNN terminated the forward starting swaps with a aggregate notional amount of $240,000,000 that were hedging the risk of changes in forecasted interest payments on a forecasted issuance of long-term debt. When terminated, the fair value of the forward starting swaps, designated as cash flow hedges, was a liability of $3,156,000, of which $3,141,000 was deferred in other comprehensive income. The amount reported in accumulated other comprehensive income will be reclassified to interest expense as interest payments are made on the 2023 Notes. In March 2013, the market price condition on NNN's 5.125% convertible senior notes due 2028 ("2028 Notes") was satisfied, and the 2028 Notes became convertible during the quarter beginning April 1, 2013. As of May 1, 2013, the 2028 Notes are convertible at a rate of 39.536 shares of NNN's common stock per $1,000 principal amount of 2028 Notes. Through May 2, 2013, approximately $91,000 principal amount of 2028 Notes had been surrendered for conversion, and approximately $222,944,000 principal amount of 2028 Notes remained outstanding. There were no other reportable subsequent events or transactions.

Subsequent Events:

NNN reviewed its subsequent events and transactions that have occurred after March 31, 2013, the date of the condensed consolidated balance sheet.

In April 2013, NNN closed on its public offering of $350,000,000 principal amount of 3.300% senior unsecured notes due April 15, 2023 (“2023 Notes”). The public offering price was 99.259% of the principal amount for a yield of 3.388%. The 2023 Notes are senior unsecured obligations of the Company and are registered under the Company's existing shelf registration statement filed with the Securities and Exchange Commission. NNN used a portion of the net proceeds from this offering to repay NNN's outstanding indebtedness under its Credit Facility and NNN intends to use the remainder of the net proceeds to fund future property acquisitions and for general corporate purposes. Additionally, in connection with this note issuance, NNN terminated the forward starting swaps with a aggregate notional amount of $240,000,000 that were hedging the risk of changes in forecasted interest payments on a forecasted issuance of long-term debt. When terminated, the fair value of the forward starting swaps, designated as cash flow hedges, was a liability of $3,156,000, of which $3,141,000 was deferred in other comprehensive income. The amount reported in accumulated other comprehensive income will be reclassified to interest expense as interest payments are made on the 2023 Notes.

In March 2013, the market price condition on NNN's 5.125% convertible senior notes due 2028 ("2028 Notes") was satisfied, and the 2028 Notes became convertible during the quarter beginning April 1, 2013. As of May 1, 2013, the 2028 Notes are convertible at a rate of 39.536 shares of NNN's common stock per $1,000 principal amount of 2028 Notes. Through May 2, 2013, approximately $91,000 principal amount of 2028 Notes had been surrendered for conversion, and approximately $222,944,000 principal amount of 2028 Notes remained outstanding. There were no other reportable subsequent events or transactions.