Schedule III - Real Estate and Accumulated Depreciation and Amortization Under Direct Financing Leases (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Gross Amount at Which Carried at Close of Period, Land, Building, Improvements & Leasehold Interests	$ 4,686,844		$ 4,145,368	$ 3,531,845	$ 2,774,947
Real Estate and Accumulated Depreciation, Accumulated Depreciation and Amortization	418,136		333,778	270,621	222,921
Direct Financing Lease | CVS Lafayette, LA
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost to Company, Land	0
Real Estate and Accumulated Depreciation, Initial Cost to Company, Building, Improvements & Leasehold Interests	949
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Gross Amount at Which Carried at Close of Period, Land	0	[1],[2]
Direct Financing Lease | CVS Oklahoma City, OK1
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost to Company, Building, Improvements & Leasehold Interests	1,365
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Direct Financing Lease | CVS Oklahoma City, OK2
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost to Company, Building, Improvements & Leasehold Interests	1,419
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Direct Financing Lease | Denny's Stockton, CA
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost to Company, Land	940
Real Estate and Accumulated Depreciation, Initial Cost to Company, Building, Improvements & Leasehold Interests	509
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Direct Financing Lease | Food 4 Less Chula Vista, CA
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost to Company, Land	0
Real Estate and Accumulated Depreciation, Initial Cost to Company, Building, Improvements & Leasehold Interests	4,266
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Gross Amount at Which Carried at Close of Period, Land	0	[1],[2]
Direct Financing Lease | Jared Jewelers Phoenix, AZ
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Encumbrances	27	[3]
Real Estate and Accumulated Depreciation, Initial Cost to Company, Building, Improvements & Leasehold Interests	1,242
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Direct Financing Lease | Jared Jewelers Toledo, OH
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost to Company, Building, Improvements & Leasehold Interests	1,458
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Direct Financing Lease | Jared Jewelers Lewisville, TX
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Encumbrances	136	[3]
Real Estate and Accumulated Depreciation, Initial Cost to Company, Building, Improvements & Leasehold Interests	1,503
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Direct Financing Lease | Jared Jewelers Glendale, AZ
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost to Company, Building, Improvements & Leasehold Interests	1,599
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Direct Financing Lease | Jared Jewelers Oviedo, FL
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Encumbrances	263
Real Estate and Accumulated Depreciation, Initial Cost to Company, Building, Improvements & Leasehold Interests	1,500
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Direct Financing Lease | Kash n' Karry Valrico, FL
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost to Company, Land	1,235
Real Estate and Accumulated Depreciation, Initial Cost to Company, Building, Improvements & Leasehold Interests	3,255
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Direct Financing Lease | Rite Aid Kennett Square, PA
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost to Company, Building, Improvements & Leasehold Interests	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,984
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Direct Financing Lease | Rite Aid Arlington, VA
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost to Company, Building, Improvements & Leasehold Interests	3,201
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Direct Financing Lease | Sunshine Energy Altamont, KS
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost to Company, Land	124
Real Estate and Accumulated Depreciation, Initial Cost to Company, Building, Improvements & Leasehold Interests	142
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Direct Financing Lease | Real Estate Held for Investment Under Direct Financing Leases
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Encumbrances	426
Real Estate and Accumulated Depreciation, Initial Cost to Company, Land	2,299
Real Estate and Accumulated Depreciation, Initial Cost to Company, Building, Improvements & Leasehold Interests	22,408
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,984
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Gross Amount at Which Carried at Close of Period, Land	0	[1],[2]
Real Estate and Accumulated Depreciation, Gross Amount at Which Carried at Close of Period, Building, Improvements & Leasehold Interests	0	[1],[2]
Real Estate and Accumulated Depreciation, Gross Amount at Which Carried at Close of Period, Land, Building, Improvements & Leasehold Interests	0	[1],[2]
Real Estate and Accumulated Depreciation, Accumulated Depreciation and Amortization	$ 0

[1] As of December 31, 2013, the leases are treated as either operating or financing leases for federal income tax purposes. As of December 31, 2013, the aggregate cost of the properties owned by NNN that are under operating leases were $4,565,187 and financing leases were $2,703.

[2] Transactions in real estate and accumulated depreciation during 2013, 2012, and 2011 are summarized as follows: 2013 2012 2011Land, buildings, and leasehold interests: Balance at the beginning of year$4,145,368 $3,531,845 $2,774,947Acquisitions, completed construction and tenant improvements602,836 701,054 772,073Disposition of land, buildings, and leasehold interests(57,254) (77,219) (14,744)Provision for loss on impairment of real estate(4,106) (10,312) (431)Balance at the close of year$4,686,844 $4,145,368 $3,531,845Accumulated depreciation and amortization: Balance at the beginning of year$333,778 $270,621 $222,921Disposition of land, buildings, and leasehold interests(6,778) (6,980) (3,010)Depreciation and amortization expense91,136 70,137 50,710Balance at the close of year$418,136 $333,778 $270,621

[3] NNN owns only the building for this property, which is encumbered by a fixed rate mortgage and security agreement.